@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{Boehm, author = {B{\"o}hm, Christian}, title = {Erzeugung von Energieholz in Energiew{\"a}ldern und Agroforstsystemen}, series = {Innovationen f{\"u}r Klimaschutz und wirtschaftliche Entwicklung, 2. Rostocker Bioenergieforum, 29. und 30. Oktober 2008 an der Universit{\"a}t Rostock}, booktitle = {Innovationen f{\"u}r Klimaschutz und wirtschaftliche Entwicklung, 2. Rostocker Bioenergieforum, 29. und 30. Oktober 2008 an der Universit{\"a}t Rostock}, editor = {Nelles, Michael}, publisher = {Universit{\"a}t Rostock}, address = {Rostock}, isbn = {978-3-86009-044-2}, pages = {109 -- 118}, language = {de} } @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{GruenewaldBoehmBaerwolffetal., author = {Gr{\"u}newald, Holger and B{\"o}hm, Christian and B{\"a}rwolff, Manuela and W{\"o}llecke, Jens and Quinkenstein, Ansgar and Hoffmann, J{\"o}rg}, title = {{\"O}kologische Aspekte von Agroforstsystemen}, series = {2. Symposium Energiepflanzen 2009, 17./18. November 2009, Berlin}, booktitle = {2. Symposium Energiepflanzen 2009, 17./18. November 2009, Berlin}, publisher = {FNR}, address = {G{\"u}lzow}, isbn = {978-3-942147-01-9}, pages = {233 -- 263}, language = {de} } @techreport{KanzlerBoehm, author = {Kanzler, Michael and B{\"o}hm, Christian}, title = {Nachhaltige Erzeugung von Energieholz in Agroforstsystemen (AgroForstEnergie II), Teilvorhaben 2: Bodenschutz und Bodenfruchtbarkeit, Wasserhaushalt und Mikroklima}, publisher = {Brandenburgische Techn. Univ. [u.a.]}, address = {Cottbus-Senftenberg}, pages = {156}, language = {de} } @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{KanzlerBoehmQuinkenstein, author = {Kanzler, Michael and B{\"o}hm, Christian and Quinkenstein, Ansgar}, title = {Alley Cropping - A promising multifunctional form of land use for reclaimed lignite mining sites in 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 = {55 -- 57}, abstract = {Since the 1920s, more than 80.000 ha of land have been affected by lignite opencast mining activities in the Lusatia region (Eastern Germany), resulting in the evolution of large post-mining landscapes with substrates poor in humus and nutrients. As a consequence, the current conventional crop production on these post-mining areas is restricted. Against this background, the increasing demand for woody biomass for bioenergy, and thus the cultivation of fast growing trees for woody biomass production, could represent a promising option to enhance the productivity of land reclaimed from mining. Accordingly, considerable research has been carried out over the last two decades on reclamation technology, in addition to attempts to improve the soil quality through the use of different fast growing tree species in the Lusatia lignite region. Through such studies, it has been shown that it is possible to cultivate a sustainable supply of bioenergy wood through the use of black locust (Robinia pseudoacacia L.) trees, even under the unfavourable growth conditions of the marginal post mining areas. Since this knowledge is mainly based on studies of monocultural plantations (SRC), in 2007 a short rotation alley cropping system (SRACS) was established in the reclaimed lignite mining site "Welzow-S{\"u}d" with the purpose of obtaining fresh insight. The present paper evaluates the positive impacts of agroforestry land-use in terms of soil fertility, agricultural crop production, and soil protection against wind erosion based on the results of several years of examination made in this degraded area.}, 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} } @inproceedings{LeueEllerbrockGerkeetal., author = {Leue, M. and Ellerbrock, Ruth H. and Gerke, Horst H. and B{\"o}hm, Christian}, title = {In-situ characterization of organic matter composition at aggregate surfaces using DRIFT spectroscopy}, series = {EGU General Assembly 2008, Wien}, booktitle = {EGU General Assembly 2008, Wien}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, 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} } @misc{MajauraSutterluettiBoehm, author = {Majaura, Marie and Sutterl{\"u}tti, Rahel and B{\"o}hm, Christian}, title = {Tree strips reduce atmospheric evaporative demand and influence crop water use efficiency in crop alleys of a temperate alley cropping system}, series = {Agricultural water management}, volume = {328}, journal = {Agricultural water management}, publisher = {Elsevier BV}, address = {Amsterdam}, issn = {0378-3774}, doi = {10.1016/j.agwat.2026.110297}, pages = {1 -- 14}, abstract = {Agroforestry is widely recognized as a promising strategy for climate change adaptation and mitigation, partly because trees modify the microclimate and can thereby stabilize crop yields under increasing climatic variability and fluctuating water availability. However, how these microclimatic modifications influence precipitation partitioning, atmospheric evaporative demand (AED) and crop water-use efficiency (WUE) has received comparatively little research attention, particularly in temperate alley cropping systems (ACS). In this study, we analysed spatial patterns of precipitation (measured at gauge height), reference evapotranspiration (ET0) and WUE at varying distances from tree strips in a temperate ACS and an open field (OF) reference across three crops and two growing seasons. Higher precipitation amounts were frequently recorded in the ACS, particularly near tree strips, while values within the crop alley were often lowest at the centre position. ET0 was consistently lower in the ACS than in the OF and showed distinct spatial variability within the alley. WUE patterns depended strongly on the calculation approach: evapotranspiration-based WUE was generally higher at mid-alley positions than in the OF, whereas precipitation-based WUE showed comparable values between systems. Notably, these differences in evapotranspiration-based WUE occurred despite similar grain yields and were primarily driven by reduced AED rather than higher yields. Overall, our results show that tree-induced microclimatic buffering reduces AED within crop alleys and that resulting differences in WUE strongly depend on the metric used.}, language = {en} }