@inproceedings{MirckBoehmKanzleretal., author = {Mirck, Jaconette and B{\"o}hm, Christian and Kanzler, Michael and Freese, Dirk}, title = {Blattstreumengen in Geh{\"o}lzstreifen und angrenzenden Ackerbreichen innerhalb eines Agroforstsystems}, series = {Multifunktionale Agrarlandschaften - Pflanzenbaulicher Anspruch, Biodiversit{\"a}t, {\"O}kosystemdienstleistungen, 58. Jahrestagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V., 22. bis 24. September 2015, Braunschweig}, booktitle = {Multifunktionale Agrarlandschaften - Pflanzenbaulicher Anspruch, Biodiversit{\"a}t, {\"O}kosystemdienstleistungen, 58. Jahrestagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V., 22. bis 24. September 2015, Braunschweig}, editor = {Kage, Henning and Sieling, K. and Francke-Weltmann, L.}, publisher = {Halm}, address = {G{\"o}ttingen}, pages = {219 -- 220}, language = {de} } @inproceedings{KanzlerBoehmMircketal., author = {Kanzler, Michael and B{\"o}hm, Christian and Mirck, Jaconette and Freese, Dirk}, title = {Variabilit{\"a}t des Mikroklimas im Einflussbereich der geh{\"o}lzstreifen eines Agroforstsystems}, series = {Multifunktionale Agrarlandschaften - Pflanzenbaulicher Anspruch, Biodiversit{\"a}t, {\"O}kosystemdienstleistungen, 58. Jahrestagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V., 22. bis 24. September 2015, Braunschweig}, booktitle = {Multifunktionale Agrarlandschaften - Pflanzenbaulicher Anspruch, Biodiversit{\"a}t, {\"O}kosystemdienstleistungen, 58. Jahrestagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V., 22. bis 24. September 2015, Braunschweig}, editor = {Kage, Henning and Sieling, K. and Francke-Weltmann, L.}, publisher = {Halm}, address = {G{\"o}ttingen}, pages = {77 -- 78}, language = {de} } @inproceedings{BoehmKanzlerMircketal., author = {B{\"o}hm, Christian and Kanzler, Michael and Mirck, Jaconette and Freese, Dirk}, title = {Effekte agroforstlicher Wirtschaftsweisen auf die Grundwasserqualit{\"a}t von Ackerstandorten}, series = {Multifunktionale Agrarlandschaften - Pflanzenbaulicher Anspruch, Biodiversit{\"a}t, {\"O}kosystemdienstleistungen, 58. Jahrestagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V., 22. bis 24. September 2015, Braunschweig}, booktitle = {Multifunktionale Agrarlandschaften - Pflanzenbaulicher Anspruch, Biodiversit{\"a}t, {\"O}kosystemdienstleistungen, 58. Jahrestagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V., 22. bis 24. September 2015, Braunschweig}, editor = {Kage, Henning and Sieling, K. and Francke-Weltmann, L.}, publisher = {Halm}, address = {G{\"o}ttingen}, pages = {83 -- 84}, language = {de} } @inproceedings{BoehmQuinkensteinFreese, author = {B{\"o}hm, Christian and Quinkenstein, Ansgar and Freese, Dirk}, title = {Agrarholzproduktion und Agroforstsysteme - Chancen und Risiken f{\"u}r den Gew{\"a}sserschutz}, series = {Wirkung und Folgen der Nutzung von Biomasse zur Biogasgewinnung auf B{\"o}den und Gew{\"a}sser, 12. - 13. Oktober in Suderburg}, booktitle = {Wirkung und Folgen der Nutzung von Biomasse zur Biogasgewinnung auf B{\"o}den und Gew{\"a}sser, 12. - 13. Oktober in Suderburg}, pages = {145 -- 158}, language = {de} } @inproceedings{BoehmQuinkensteinFreeseetal., author = {B{\"o}hm, Christian and Quinkenstein, Ansgar and Freese, Dirk and H{\"u}ttl, Reinhard F.}, title = {Short rotation woody biomass production as option for the restoration of post-mining areas in Lower Lusatia, Germany}, series = {Book of Abstracts, XVIIth World Congress of the International Commission of Agricultural and Biosystems Engineering, Qu{\´e}bec City, Canada, June 13-17, 2010}, booktitle = {Book of Abstracts, XVIIth World Congress of the International Commission of Agricultural and Biosystems Engineering, Qu{\´e}bec City, Canada, June 13-17, 2010}, editor = {Savoie, Philippe and Villeneuve, Joey and Morisette, Ren{\´e}}, publisher = {CSBE}, address = {Winnipeg}, isbn = {978-2-9811062-1-6}, pages = {S. 247}, language = {en} } @inproceedings{QuinkensteinBoehmFreeseetal., author = {Quinkenstein, Ansgar and B{\"o}hm, Christian and Freese, Dirk and H{\"u}ttl, Reinhard F.}, title = {Short rotation coppice with Robinia pseudoacacia L. - A land use option for carbon sequestration on reclaimed mine sites}, series = {Book of Abstracts, XVIIth World Congress of the International Commission of Agricultural and Biosystems Engineering, Qu{\´e}bec City, Canada, June 13-17, 2010}, booktitle = {Book of Abstracts, XVIIth World Congress of the International Commission of Agricultural and Biosystems Engineering, Qu{\´e}bec City, Canada, June 13-17, 2010}, editor = {Savoie, Philippe and Villeneuve, Joey and Morisette, Ren{\´e}}, publisher = {CSBE}, address = {Winnipeg}, isbn = {978-2-9811062-1-6}, pages = {S. 327}, language = {en} } @inproceedings{FreeseBoehmQuinkensteinetal., author = {Freese, Dirk and B{\"o}hm, Christian and Quinkenstein, Ansgar and H{\"u}ttl, Reinhard F.}, title = {The contribution of agroforestry systems to ecosystem services}, series = {Book of Abstracts, XVIIth World Congress of the International Commission of Agricultural and Biosystems Engineering, Qu{\´e}bec City, Canada, June 13-17, 2010}, booktitle = {Book of Abstracts, XVIIth World Congress of the International Commission of Agricultural and Biosystems Engineering, Qu{\´e}bec City, Canada, June 13-17, 2010}, editor = {Savoie, Philippe and Villeneuve, Joey and Morisette, Ren{\´e}}, publisher = {CSBE}, address = {Winnipeg}, isbn = {978-2-9811062-1-6}, pages = {S. 378}, language = {en} } @inproceedings{MosqueraLosadaLamersdorfDuprazetal., author = {Mosquera-Losada, Mar{\´i}a Rosa and Lamersdorf, N. P. and Dupraz, Christian and Rigueiro-Rodr{\´i}guez, A. and Moreno, G. and Burgess, Paul J. and Freese, Dirk and Pantera, Anastasia and Papanastasis, V. and Amaral, P. J. and Palma, J. and Rosatti, A. and Mezzalira, G. and Watte, J. and Briggs, S.}, title = {Presenting the European Agroforestry Federation}, series = {Conference Proceedings, 13th North American Agroforestry Conference, 19-21 Juni 2013 in Charlottetown, Kanada}, booktitle = {Conference Proceedings, 13th North American Agroforestry Conference, 19-21 Juni 2013 in Charlottetown, Kanada}, editor = {Poppy, Laura and Kort, John and Schroeder, Bill and Pollock, Tricia and Soolanayakanahally, Raju}, address = {Charlottetown, Prince Edwards Island, Canada}, pages = {69 -- 70}, abstract = {The European Agroforestry Federation (EURAF) was founded in Paris in December 2011 by almost 250 people coming from 17 European countries. EURAF aims at promoting the adoption of all agroforestry practices across Europe (new and traditional).}, language = {en} } @inproceedings{QuinkensteinBoehmFreeseetal., author = {Quinkenstein, Ansgar and B{\"o}hm, Christian and Freese, Dirk and H{\"u}ttl, Reinhard F.}, title = {Agroforestry systems for the production of woody biomass in marginal regions in Northeast Germany}, series = {Proceedings of the International Workshop on Agroforestry - Ecological Benefits of Agroforestry, 15-17 June 2011, Cottbus, Germany}, booktitle = {Proceedings of the International Workshop on Agroforestry - Ecological Benefits of Agroforestry, 15-17 June 2011, Cottbus, Germany}, editor = {Freese, Dirk and Pittruff, N. and Quinkenstein, Ansgar and B{\"o}hm, Christian}, pages = {S. 13}, language = {en} } @inproceedings{QuinkensteinBoehmFreese, author = {Quinkenstein, Ansgar and B{\"o}hm, Christian and Freese, Dirk}, title = {Blattstreu-Umsatz in Robinien-Kurzumtriebsplantagen auf Lausitzer Tagebau-Rekultivierungsfl{\"a}chen}, series = {B{\"o}den verstehen, B{\"o}den nutzen, B{\"o}den fit machen, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, 3. - 9. September 2011}, booktitle = {B{\"o}den verstehen, B{\"o}den nutzen, B{\"o}den fit machen, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, 3. - 9. September 2011}, language = {de} } @inproceedings{BoehmQuinkensteinFreese, author = {B{\"o}hm, Christian and Quinkenstein, Ansgar and Freese, Dirk}, title = {Effekte der Agraholzproduktion auf den Kohlenstoff- und N{\"a}hrstoffhaushalt des Bodens im Bereich der Lausitzer Bergbaufolgelandschaft}, series = {B{\"o}den verstehen, B{\"o}den nutzen, B{\"o}den fit machen, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, 3. - 9. September 2011}, booktitle = {B{\"o}den verstehen, B{\"o}den nutzen, B{\"o}den fit machen, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, 3. - 9. September 2011}, language = {de} } @inproceedings{BoehmKanzlerFreese, author = {B{\"o}hm, Christian and Kanzler, Michael and Freese, Dirk}, title = {Fast growing tree species in alley cropping systems and their influence on microclimate in Germany}, series = {Conference Proceedings, 13th North American Agroforestry Conference, 19-21 Juni 2013 in Charlottetown, Kanada}, booktitle = {Conference Proceedings, 13th North American Agroforestry Conference, 19-21 Juni 2013 in Charlottetown, Kanada}, editor = {Poppy, Laura and Kort, John and Schroeder, Bill and Pollock, Tricia and Soolanayakanahally, Raju}, address = {Charlottetown, Prince Edwards Island, Canada}, pages = {97 -- 104}, language = {en} } @inproceedings{MantovaniFreeseVesteetal., author = {Mantovani, Dario and Freese, Dirk and Veste, Maik and H{\"u}ttl, Reinhard F.}, title = {Modified wick lysimeters for critical water use efficiency evaluation and yield crop modelling}, series = {Bericht, 14. Lysimetertagung, am 3. und 4. Mai 2011 am LFZ Raumberg-Gumpenstein}, booktitle = {Bericht, 14. Lysimetertagung, am 3. und 4. Mai 2011 am LFZ Raumberg-Gumpenstein}, publisher = {LFZ Raumberg-Gumpenstein}, address = {Irdning}, isbn = {978-3-902559-61-6}, pages = {245 -- 248}, language = {en} } @misc{DimitrovaRepmannFreese, author = {Dimitrova, Tsvetelina and Repmann, Frank and Freese, Dirk}, title = {Degradation of ferrocyanide by natural isolated bacteria}, series = {Book of Abstracts / The 15th International Phytotechnology Conference, 1-5 Octorber 2018, Novi Sad}, journal = {Book of Abstracts / The 15th International Phytotechnology Conference, 1-5 Octorber 2018, Novi Sad}, editor = {Orlovic, Sasa}, publisher = {University of Novi Sad}, address = {Novi Sad}, isbn = {978-86-912323-9-9}, pages = {177}, language = {en} } @misc{MajauraBoehmFreese, author = {Majaura, Marie and B{\"o}hm, Christian and Freese, Dirk}, title = {The influence of trees on crop yields in temperate zone alley cropping systems : a review}, series = {Sustainability}, volume = {16}, journal = {Sustainability}, number = {8}, issn = {2071-1050}, doi = {10.3390/su16083301}, abstract = {Agroforestry is a multifunctional land use system that represents a promising approach to mitigate the environmental impact of agriculture while enhancing the resilience of agricultural systems and ensuring sustainable food production. However, the tree rows in agroforestry systems, particularly in alley cropping systems (ACS), can affect crop productivity on adjacent agricultural fields through various mechanisms. Hence, concerns about declining yields and reduced farm profitability persist and explain the reluctance of farmers to implement ACS on their land. In this review, we examine the available literature on the effects of temperate ACS on yields of various agricultural crops to evaluate if and to what extent crop yields in ACS are affected by tree presence. We identified that ACS crop yields often vary substantially across different species, geographical locations, weather conditions and ACS designs. Our analysis also revealed that several parameters are modified in ACS by the presence of tree rows affecting crop yields positively or negatively and that ACS design aspects play a crucial role in determining crop productivity.}, language = {en} } @inproceedings{MantovaniVesteFreese, author = {Mantovani, Dario and Veste, Maik and Freese, Dirk}, title = {Black locust (Robinia pseudoacacia L.) adaptability and plasticity to drought}, series = {2nd European Agroforestry Conference: Integrating Science and Policy to Promote Agroforestry in Practice, June 2014, Cottbus, Germany}, booktitle = {2nd European Agroforestry Conference: Integrating Science and Policy to Promote Agroforestry in Practice, June 2014, Cottbus, Germany}, editor = {Palma, Joao H. N.}, isbn = {978-972-97874-4-7}, pages = {264 -- 265}, abstract = {Robinia pseudoacacia L. is a pioneer tree species which grows under a wide range of edaphic and climatic conditions. It is native from North America and its original range is a climatic region classified as humid to sub-humid, with a mean annual precipitation of 1.020 to 1.830 mm. However, in Central Europe the species has proven to be relatively drought tolerant in comparison to other temperate deciduous tree species. In the State of Brandenburg (Germany) for instance, with a continental climate and annual precipitation below 600 mm, the species has been successfully cropped for wood production for more than 250 years. The tree notably grows also in post-mining recultivated sites where soil water availability is limited and in spring and summer drought can occur. The importance of the species has increased over the lasts decades, after the CO2 reduction policy spread across the world, just as did the need for further sources for renewable energy. Therefore, due to its adaptability to water constraints, its fast growing and resprouting rate, together with the ability of nitrogen fixation, black locust could become a key species for short-rotation plantation on marginal land. Several studies have been already carried out to quantify the production and water use efficiency of the black locust. However, the effect of water scarcity on biomass production and the plant's response to drought stress has still to be examined. In ourinvestigation we aim to evaluate the growth performance and the ecophysiological response of black locust to water limitation. The study of the soil-plant-atmosphere system for the evaluation of the relation between water availability, atmospheric evaporative demand and plant water status is critical to identify the ecophysiological adaptation and growth response in relation to different edaphic and climatic conditions. Different irrigation regimes and cycles of drought were chosen, to test the plant's performance in a lysimeter experiment for the duration of two vegetation periods, under semi-controlled environmental conditions. The results obtained from studies were satisfactory. We assessed the drought tolerance and resilience of black locust, together with its water use efficiency. Both at whole-plant and leaf level the link between the soil water retention, plant water status and growth rate has been elucidated and the intertwined relation between primary production, transpiration, CO2 uptake and water limitation, together with the evaporative atmospheric demand, has been clarified.}, language = {en} } @inproceedings{QuinkensteinMatosFreeseetal., author = {Quinkenstein, Ansgar and Matos, Eduardo da Silva and Freese, Dirk and Jochheim, Hubert and Schneider, Bernd Uwe and H{\"u}ttl, Reinhard F.}, title = {Estimating the carbon sequestration potential of short rotation coppice on marginal sites: a model approach}, series = {Book of Abstracts, 2nd World Congress of Agroforestry, Agroforestry - The Future of Global Land Use}, booktitle = {Book of Abstracts, 2nd World Congress of Agroforestry, Agroforestry - The Future of Global Land Use}, publisher = {World Agroforestry Centre}, address = {Nairobi, Kenya}, isbn = {978-92-9059-255-6}, pages = {S. 164}, language = {en} } @inproceedings{BoehmWoelleckeElmeretal., author = {B{\"o}hm, Christian and W{\"o}llecke, Jens and Elmer, Michael and Quinkenstein, Ansgar and Freese, Dirk and H{\"u}ttl, Reinhard F.}, title = {Biodiversity in Agroforestry Systems}, series = {Book of Abstracts, 2nd World Congress of Agroforestry, Agroforestry - The Future of Global Land Use}, booktitle = {Book of Abstracts, 2nd World Congress of Agroforestry, Agroforestry - The Future of Global Land Use}, publisher = {World Agroforestry Centre}, address = {Nairobi, Kenya}, isbn = {978-92-9059-255-6}, pages = {S. 598}, language = {en} } @inproceedings{MantovaniVesteFreese, author = {Mantovani, Dario and Veste, Maik and Freese, Dirk}, title = {Biomass production in agro-­-systems: Is black locust (Robinia pseudoacacia L.) the right choice?}, series = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, booktitle = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, editor = {Jeltsch, Florian and Joshi, Jasmin}, pages = {28 -- 29}, abstract = {Currently, black locust (Robinia pseudoacacia L.) is an important tree species in Central and Eastern Europe for the production of biomass in short-rotation plantations. Being a ruderal species and relatively drought tolerant compared to other broad leaf trees, its use in agroforestry systems will increase. That is particularly true for marginal landscapes characterized by adverse edaphic conditions, where the soil water availability is limited and in summer drought can occur. Several studies have been carried out on the subject of the black locust primary production; however there are still open questions associated with its water consumption and the biomass production, in relation to the soil water availability. In order to investigate the soil-plant-atmosphere system interactions, in our studies the links between the growth rate, water use efficiency and the ecophysiological response have been examined in a two year lysimeter experiment. The two years old black locust plants were selected from a recultivated post-mining area (Welzow S{\"u}d, Lusatia, Brandenburg) and established in a 100 L wicked lysimeter, installed under a light transmissive roof to avoid uncontrolled water input. During the first vegetation period, the trees were maintained constantly under three different soil moisture regimes (well-watered, moderate, drought), in relation to the hydrostatic state of the lysimeters. For the second vegetation period instead, the plants were subjected to two different irrigation cycles (long term drought stress, short term drought stress), in relation of the drought stress and recovering time duration. The results were satisfactory. At whole plant level the water use efficiency, the growth rate under different soil moisture conditions and the morphological adaptation to drought condition were assessed. In addition, at leaf level we elucidated the relation between the soil moisture together with the atmospheric evaporative demand and the ecophysiological performance in terms of H2O and CO2 rate variation. From the results emerged that the black locust cultivar may have a positive or negative effect on the ecosystem function, depending on the water availability of the areas in object. The tree can tolerate periods of drought by reducing its transpiration rate, yet it is not to be considered a water saving trees species in a well watered condition.}, language = {en} } @inproceedings{HalkeGypserMantovanietal., author = {Halke, Christian and Gypser, Stella and Mantovani, Dario and Lebzien, Stefan and Freese, Dirk and Veste, Maik}, title = {Yield, transpiration and growth of the new bioenergy crop IGNISCUM Candy under different water regimes}, series = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, booktitle = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, editor = {Jeltsch, Florian and Joshi, Jasmin}, pages = {32 -- 33}, abstract = {There is a growing global need to produce more energy and reducing greenhouse gas emissions. One possible source of renewable energy in parts of Europe is the use of crop for bioenergy production. Currently, maize dominates the biogas production. For a diversified production of substrates alternative crops needs to be evaluated for their sustainable utilization and ecological integration into agro-systems. The new bioenergy plants IGNISCUM Candy and IGNISCUM Basic are cultivars of the Sakhalin Knotweed (Fallopia sachalinensis, Fam. Polygonaceae), which are characterized by a high annual biomass production. Information on the crop production of this species is rare. Hence, understanding plant response to the combinations of water and nutrients availability is crucial for the development of sustainable plant production. In greenhouse experiments we investigate the interrelations between nutrient supply, biomass production, and plant ecophysiology. For the determination of yield-transpiration relations at whole plant level we used a wick lysimeter system, which allows us to study plant growth under controlled water regimes and to calculate the plant transpiration. The irrigation is supplied by an automatic drip irrigation system and computer-controlled in relation to the volumetric soil water content. Four different water treatments associated to the SWC range from well-watered to drought stressed plants. The influence of plant sizes on plant water use was investigated under different nitrogen supply. The fertilizer applied is calcium ammonium nitrate (N) and the rates for the four treatments are 0, 50, 100, 150 kg N/ha at the beginning of the growing season. Plant transpiration is calculated on the basis of water input, storage and drainage in weekly intervals. The cumulative transpiration of the plants during the growing season is between 49 L (drought stressed) and 141 L (well-watered) per plant, respectively. We calculated a transpiration coefficient of 525 Liters per kg dry biomass.}, language = {en} } @inproceedings{BoehmKanzlerFreese, author = {B{\"o}hm, Christian and Kanzler, Michael and Freese, Dirk}, title = {Agroforstsysteme in S{\"u}dbrandenburg - Effekte auf Mikroklima und Wasserqualit{\"a}t}, series = {Nachhaltige Erzeugung von Nachwachsenden Rohstoffen, Tagung vom 04. bis 06. September 2013, Weihenstephan}, booktitle = {Nachhaltige Erzeugung von Nachwachsenden Rohstoffen, Tagung vom 04. bis 06. September 2013, Weihenstephan}, editor = {Pekrun, C. and Wachendorf, Magnus and Francke-Weltmann, L.}, publisher = {Verlag Halm}, address = {G{\"o}ttingen}, pages = {180 -- 181}, abstract = {Der Agrarholzanbau stellt allgemein eine sehr extensive Form der landwirtschaftlichen Fl{\"a}chennutzung dar. So k{\"o}nnen beispielsweise die Winderosion oder der Stoffaustrag in das Grundwasser durch den Anbau von B{\"a}umen auf ackerbaulich genutzten Standorten deutlich reduziert werden. Durch die Kombination von B{\"a}umen und konventionellen Ackerfr{\"u}chten (Agroforstwirtschaft) k{\"o}nnen auch angrenzende Feldfruchtbereiche und somit der gesamte Ackerschlag von diesen positiven Effekten des Agrarholzanbaus profitieren. Im Rahmen dieser Studie wurde beispielhaft untersucht, ob und inwieweit der streifenf{\"o}rmige Anbau (Alley-Cropping) von im Kurzumtrieb bewirtschaftetem Agrarholz einerseits zu einer Verbesserung des Windschutzes und andererseits zu einer Erh{\"o}hung der Grundwasserqualit{\"a}t beitragen kann.}, language = {de} } @inproceedings{BoehmQuinkensteinFreeseetal., author = {B{\"o}hm, Christian and Quinkenstein, Ansgar and Freese, Dirk and H{\"u}ttl, Reinhard F.}, title = {Research in agroforestry at the Brandenburg University of Technology in Cottbus}, series = {Proceedings of the International Workshop on Agroforestry - Ecological Benefits of Agroforestry, 15-17 June 2011, Cottbus, Germany,}, booktitle = {Proceedings of the International Workshop on Agroforestry - Ecological Benefits of Agroforestry, 15-17 June 2011, Cottbus, Germany,}, editor = {Freese, Dirk and Pittruff, N. and Quinkenstein, Ansgar and B{\"o}hm, Christian}, pages = {S. 7}, language = {en} } @inproceedings{MedinskiFreeseBoehm, author = {Medinski, Tanya V. and Freese, Dirk and B{\"o}hm, Christian}, title = {Soil respiration in alley-cropping system composed of black locust and poplar trees, Germany}, series = {2nd European Agroforestry Conference: Integrating Science and Policy to Promote Agroforestry in Practice, June 2014, Cottbus, Germany}, booktitle = {2nd European Agroforestry Conference: Integrating Science and Policy to Promote Agroforestry in Practice, June 2014, Cottbus, Germany}, editor = {Palma, Joao H. N.}, isbn = {978-972-97874-4-7}, pages = {253 -- 254}, abstract = {Understanding of soil carbon dynamics after establishment of alley-cropping systems is crucial for mitigation of greenhouse gas CO2. This study investigates soil CO2 flux in an alley-cropping system composed of black locust (Robinia pseudoacacia L.) and poplar (Max 1) tree strips and adjacent to them crop strips (Lupinus/ Solarigol). Soil CO2 flux was measured monthly over the March - November 2012 period, using a LI-COR LI-8100A automated device. Simultaneously with CO2 flux measurements, soil and air temperature, soil moisture, microbial C and hot water-extractable carbon (HWC) were determined for soils collected nearby each measurement collar. Root biomass was measured to a depth of 15 cm. In all sampling areas, soil CO2 flux increased from May to July, showing a significant positive correlation with air and soil temperature, which can be a reflection of increase in photosynthetic activity over the warm summer months. The relationships between soil moisture and CO2 flux showed positive correlation only for the warm period (May - October), indicating enhancing role of soil moisture on microbial mineralization and root respiration. CO2 flux values varied between sampling areas at different vegetation periods, with significantly higher values in trees over the summer. This could be attributed to the higher photosynthetic activity and higher root density in trees coppices compared to crops. In autumn, after seeding catch crop mix Solarigol, CO2 flux was significantly higher in crops compared to trees, which could be related to soil tillage prior to seeding of crops, as well as to the higher photosynthetic activity of newly seeded crops at the period of rapid plant growth. Despite a seasonal variation in CO2 flux between sampling areas, aaverage CO2 flux values observed over March - November period did not differ significantly between sampling areas, showing 2.5, 3.2, and 2.9 μmol m-2 s-1 values for black locust, poplar and crops, respectively. A greater C loss with soil respiration under trees in summer period may be compensated by greater C assimilation and storage in woody biomass, and the greater respiration from crop strips after tillage in autumn.}, language = {en} } @inproceedings{BoehmKanzlerFreese, author = {B{\"o}hm, Christian and Kanzler, Michael and Freese, Dirk}, title = {Impact of black locust hedgerows on wind velocity and wind erosion in Eastern Germany}, series = {2nd European Agroforestry Conference: Integrating Science and Policy to Promote Agroforestry in Practice, June 2014, Cottbus, Germany}, booktitle = {2nd European Agroforestry Conference: Integrating Science and Policy to Promote Agroforestry in Practice, June 2014, Cottbus, Germany}, editor = {Palma, Joao H. N.}, isbn = {978-972-97874-4-7}, pages = {267 -- 268}, abstract = {The production of energy wood on arable land increased in Germany during the last years. Black locust (Robinia pseudoacacia L.) is a suitable tree species in order to ensure substantial woody biomass yields on agricultural sites in eastern Germany. Arranged in hedge structures (alley cropping) positive effects on wind velocity and hence on soil erosion can be expected for the whole agricultural production area. Results of field measurements carried out in several alley cropping sites located in eastern Germany show that wind velocity can be reduced by more than 50 \%, even though tree hedgerows were not higher than four meters. Here, the reduction of wind speed was dependent on the distance to woody crops, the width of the crop alleys and the orientation of hedgerows. As a result of wind speeds reduction the potential of soil erosion by wind decreases considerably. The risk of wind erosion is even nearly negligible for 24 m wide or smaller crop alleys. The establishment of short rotation hedgerows could contribute to an enhanced protection against wind erosion and thus to an ecological and possible long-term economic appreciation of agricultural sites. Aside from erosion control, further advantages such as a lower evaporation rate, and thus a crop yield increase, may be connected to the establishment of such agroforestry systems. Against the background of the increasing demand for woody biomass for bioenergy, the cultivation of fast growing trees on agricultural sites can furthermore result in an additional incomefor farmers. This is a prerequisite for the spread of this kind of agroforestry in Germany, because a comparable large share of an unprotected field has to be planted with trees in order to ensure an efficient windbreak.}, language = {en} } @inproceedings{KanzlerBoehmFreese, author = {Kanzler, Michael and B{\"o}hm, Christian and Freese, Dirk}, title = {N{\"a}hrstoffgehalte und Ertr{\"a}ge von Kartoffeln in Abh{\"a}ngigkeit zur Entfernung vom Geh{\"o}lzstreifen in einem Agroforstsystem}, series = {Tagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V. mit der Max-Eyth-Gesellschaft Agrartechnik VDI-MEG, 16.-18. September 2014, Wien, Technik in der Pflanzenproduktion}, booktitle = {Tagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V. mit der Max-Eyth-Gesellschaft Agrartechnik VDI-MEG, 16.-18. September 2014, Wien, Technik in der Pflanzenproduktion}, editor = {Pekrun, C. and Wachendorf, Magnus and Francke-Weltmann, L.}, publisher = {Verlag Halm}, address = {G{\"o}ttingen}, pages = {264 -- 265}, abstract = {Die Agroforstwirtschaft, also die kombinierte Nutzung von B{\"a}umen und Feldfr{\"u}chten auf einer landwirtschaftlichen Fl{\"a}che, gewinnt vor dem Hintergrund der steigenden Holznachfrage sowie diverser {\"o}kologischer Vorteilswirkungen auch in Deutschland zunehmend an Bedeutung. Verglichen mit den bereits bekannten Umweltleistungen, wie etwa einer erh{\"o}hten Biodiversit{\"a}t sowie dem Schutz vor Winderosion, ist der potenzielle Einfluss der Geh{\"o}lzstreifen auf das Wachstum bzw. die N{\"a}hrstoffversorgung von angrenzenden Feldfr{\"u}chten in Agroforstsystemen noch weitestgehend ungekl{\"a}rt. Zur Quantifizierung dieser m{\"o}glichen Interaktion wurden im Jahr 2013 auf einem etwa 40 ha großen Agroforst-Versuchsstandort nahe der Stadt Forst (Lausitz) umfangreiche N{\"a}hrstoff- und Ertragsuntersuchungen durchgef{\"u}hrt.}, language = {de} } @inproceedings{BoehmKanzlerFreese, author = {B{\"o}hm, Christian and Kanzler, Michael and Freese, Dirk}, title = {Auswirkungen agroforstlicher Kurzumtriebswirtschaft auf das Bodenerosionspotential und den Kohlenstoffhaushalt sudbrandenburgischer Ackerstandorte}, series = {Tagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V. mit der Max-Eyth-Gesellschaft Agrartechnik VDI-MEG, 16.-18. September 2014, Wien, Technik in der Pflanzenproduktion}, booktitle = {Tagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V. mit der Max-Eyth-Gesellschaft Agrartechnik VDI-MEG, 16.-18. September 2014, Wien, Technik in der Pflanzenproduktion}, editor = {Pekrun, C. and Wachendorf, Magnus and Francke-Weltmann, L.}, publisher = {Verlag Halm}, address = {G{\"o}ttingen}, pages = {54 -- 55}, abstract = {ln der Region S{\"u}dbrandenburg herrschen ertragsschwache, sandige B{\"o}den vor, die von Natur aus ein geringes Wasserhalteverm{\"o}gen und ein hohes Degradationspotential durch Winderosion aufweisen. Zudem existiert hier ein vergleichsweise großer Fl{\"a}chenanteil an strukturarmen, großfl{\"a}chigen Bergbaufolgelandschaften, die sich zume1st durch eine geringe Standortsg{\"u}te auszeichnen. In diesem Beitrag werden Ergebnisse aus versChiedenen Studien vorgestellt, in denen untersucht wurde, ob und in welchem Ausmaß durch im Kurzumtrieb bewirtschaftete Agroforstsysteme die Anf{\"a}lligkeit dieser Ackerstandorte gegen{\"u}ber Winderosion gemindert und die im Boden bzw. Kippensubstrat vorhandene Menge an organischer Substanz erh{\"o}ht werden kann.}, language = {de} } @misc{MajauraFreese, author = {Majaura, Marie and Freese, Dirk}, title = {Nachhaltige Produktivit{\"a}t und Wasserverf{\"u}gbarkeit in Agroforstsystemen: der Einfluss von Geh{\"o}lzstreifen bei zwei Kulturen in den trockenen Sommern 2019 und 2020}, series = {Tagungsband 8. Forum Agroforstsysteme, 29.-30.September 2021, Bernburg (Saale)}, journal = {Tagungsband 8. Forum Agroforstsysteme, 29.-30.September 2021, Bernburg (Saale)}, editor = {G{\"o}bel, Leonie}, pages = {83 -- 87}, language = {de} } @misc{GypserFreese, author = {Gypser, Stella and Freese, Dirk}, title = {Mobilization of P from crystalline and amorphous Fe- and Al-hydroxides}, series = {EGU General Assembly 2020}, journal = {EGU General Assembly 2020}, doi = {10.5194/egusphere-egu2020-2871}, language = {en} } @misc{MajauraSutterluettiBoehmetal., author = {Majaura, Marie and Sutterl{\"u}tti, Rahel and B{\"o}hm, Christian and Freese, Dirk}, title = {High and dry : barley (Hordeum vulgare) yield benefits from tree presence in a temperate alley cropping system during a drought year}, series = {Agroforestry systems}, volume = {99}, journal = {Agroforestry systems}, number = {6}, publisher = {Springer Science and Business Media LLC}, address = {Dordrecht}, issn = {0167-4366}, doi = {10.1007/s10457-025-01267-9}, pages = {1 -- 20}, abstract = {Alley cropping systems (ACS) are promoted as sustainable, resilient and multifunctional land-use systems. However, concerns about yield reductions persist and whether these are driven by microclimate alterations or below-ground competition for water remains unclear. In this study, we measured wind speed, air temperature, and global radiation at seven positions within a 48 m wide crop alley of a short rotation ACS in Germany with summer barley (Hordeum vulgare) and poplar (Populus nigra × P. maximowiczii and P. trichocarpa Torrey \& A. Gray) and on a treeless reference field (OF) during a particularly dry and warm year. Additionally, gravimetric soil water content and crop yield were assessed with high spatial resolution. Our results show that tree strips influenced all measured parameters. Global radiation and air temperature patterns varied dynamically with shading, while night-time air temperatures were unexpectedly highest on the OF. Wind speeds were reduced by up to 98\% near tree strips and 81\% further away. Soil water content displayed a U-shaped pattern, with higher values near tree strips, a rare observation in ACS. Crop yields in the ACS were twice as high as in the OF, despite being lower near tree strips. Yields were strongly correlated with global radiation but not with air temperature, wind speed, or soil water content. These findings provide preliminary evidence that tree presence in ACS can, under certain conditions, contribute to increased crop yields. The results suggest that ACS provide potential benefits for sustainable land-use, but further multi-year and multi-site studies are needed to validate the observed yield patterns across different environments and years, particularly under varying climatic conditions. Further research should also explore the indirect effects of microclimate modifications on soil water dynamics, including evapotranspiration.}, language = {en} }