TY - GEN A1 - Böllmann, Jörg A1 - Elmer, Michael A1 - Wöllecke, Jens A1 - Raidl, Stefan A1 - Hüttl, Reinhard F. T1 - Defensive strategies of soil fungi to prevent grazing by Folsomia candida (Collembola) T2 - Pedobiologia Y1 - 2010 SN - 1873-1511 VL - 53 IS - 2 SP - 107 EP - 114 ER - TY - GEN A1 - Sut-Lohmann, Magdalena A1 - Repmann, Frank A1 - Raab, Thomas T1 - Stability of Prussian Blue in Soils of a Former Manufactured Gas Plant Site T2 - Soil and Sediment Contamination N2 - Soil contamination with iron-cyanide complexes is a common problem at former manufactured gas plant (MGP) sites. Dissolution of the cyanide, from Prussian Blue (ferric ferrocyanide), creates an environmental hazard, whereas the risk of groundwater contamination depends on the stability of dissolved iron–cyanide complexes. Lack of a standard leaching method to determine the water-soluble (plant-available) cyanide fraction generates potential limitations for implementing remediation strategies like phytoremediation. Applicability of neutral solution extraction to determine the water-soluble cyanide fraction and the stability of Prussian Blue in surface and near-surface soils of an MGP site in Cottbus, undersaturated and unsaturated water conditions, was studied in column leaching and batch extraction experiments. MGP soils used in the long-term tests varied according to the pH (5.0–7.7) and the total cyanide content (40–1718 mg kg−1). Column leaching, after four months of percolation, still yielded effluent concentrations exceeding the German drinking water limit (> 50 μg L−1) and the solubility of Prussian Blue reported in the literature (< 1 mg L−1) from both alkaline and acidic soils. Long-term (1344 h) extraction of MGP soils with distilled water was sufficient to dissolve 97% of the total cyanide from the slightly alkaline soils and up to 78% from the acidic soils. Both experiments revealed that dissolution of ferric ferrocyanide under circum-neutral pH and oxic water conditions is a function of time, where the released amount is dependent on the soil pH and total cyanide content. Unexpectedly high and continuous solubility of Prussian Blue, both in acidic and slightly alkaline MGP soils, implies the need to introduce an additional cyanide fraction (“readily soluble fraction”) to improve and specify cyanide leaching methods. Long-term extraction of cyanide-contaminated soil in neutral solution seems to be a promising approach to evaluate the potential hazard of groundwater pollution at the MGP sites. Y1 - 2014 U6 - https://doi.org/10.1080/15320383.2014.839626 SN - 1549-7887 VL - 23 IS - 5 SP - 504 EP - 522 ER - TY - CHAP A1 - Sut-Lohmann, Magdalena A1 - Boldt-Burisch, Katja A1 - Raab, Thomas T1 - Influence of Arbuscular Mycorrhizal Fungus (AMF) on degradation of iron-cyanide complexes T2 - European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015 KW - arbuscular mycorrhizal fungus Y1 - 2015 UR - http://meetingorganizer.copernicus.org/EGU2015/EGU2015-250.pdf N1 - EGU2015-250 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Boldt-Burisch, Katja A1 - Naeth, M. Anne A1 - Schneider, Bernd Uwe A1 - Hüttl, Reinhard F. T1 - Root growth, mycorrhization and physiological effects of plants growing on oil tailing sands T2 - European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015 Y1 - 2015 UR - http://meetingorganizer.copernicus.org/EGU2015/EGU2015-8991-1.pdf N1 - EGU2015-8991-1 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Sut-Lohmann, Magdalena A1 - Repmann, Frank A1 - Raab, Thomas T1 - Vertical movement of iron-cyanide complexes in soils of a former Manufactured Gas Plant site T2 - European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015 Y1 - 2015 UR - http://meetingorganizer.copernicus.org/EGU2015/EGU2015-9980.pdf N1 - EGU2015-9980 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Schaaf, Wolfgang T1 - An ecosystem approach to evaluate restoration measures in the lignite mining district of Lusatia/Germany T2 - European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015 KW - restoration measures KW - lingite mining Y1 - 2015 UR - http://meetingorganizer.copernicus.org/EGU2015/EGU2015-8693.pdf N1 - EGU2015-8693 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Mantovani, Dario A1 - Veste, Maik A1 - Freese, Dirk ED - Jeltsch, Florian ED - Joshi, Jasmin T1 - Biomass production in agro-­‐systems: Is black locust (Robinia pseudoacacia L.) the right choice? T2 - GfÖ 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany N2 - 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 Süd, 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. Y1 - 2013 UR - http://www.gfoe-2013.de/download/130905_GFOe_2013_Abstracts.small.pdf SP - 28 EP - 29 ER - TY - CHAP A1 - Schaaf, Wolfgang A1 - Elmer, Michael A1 - Gerwin, Werner A1 - Fischer, Anton A1 - Zaplata, Markus Klemens A1 - Nenov, Rossen T1 - Feedbacks between structures and processes during initial ecosystem development in an artificial catchment T2 - European Geosciences Union, General Assembly 2013, Vienna, Austria, 07 – 12 April 2013 N2 - We studied the role of strutures and processes and their feedbacks during initial ecosystem development in the artificial catchment Chicken Creek. During the first seven years, considerable changes within the catchment were observed. Both internal and external factors could be identified as driving forces for the formation of structures and patterns in the artificial catchment. Initial structures formed by the construction process and initial substrate characteristics were decisive for the distribution and flow of water. External factors like episodic events triggered erosion and dissection during this initial phase, promoted by the low vegetation cover and the unconsolidated sandy substrate. The transformation of the initial geo-system into areas with evolving terrestrial or aquatic characteristics and from a very episodic to a more permanent stream network and discharge, together with the observed vegetation dynamics increased site diversity and heterogeneity with respect to water and nutrient availability and transformation processes compared to the more homogenous conditions at point zero. The processes and feedback mechanisms in the initial development of a new landscape may deviate in rates, intensity and dominance from those known from mature ecosystems. It is therefore crucial to understand these early phases of ecosystem development and to disentangle the increasingly complex interactions between the evolving terrestrial and aquatic, biotic and abiotic compartments of the system. Artificially created catchments could be a suitable tool to study these initial developments at the landscape scale under known, designed and defined boundary conditions. Y1 - 2013 UR - http://meetingorganizer.copernicus.org/EGU2013/EGU2013-6837.pdf N1 - EGU2013-6837 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - GEN A1 - Veste, Maik A1 - Böhm, Christian A1 - Quinkenstein, Ansgar A1 - Freese, Dirk T1 - Biologische Stickstoff-Fixierung der Robinie T2 - AFZ - der Wald N2 - Als Pionierbaumart besiedelt die Robinie (Robinia pseudoacacia) schnell offene Flächen und gilt im Vergleich zu anderen mitteleuropäischen Baumarten als relativ gut angepasst an trockene Standorte mit lockeren Böden. Sie gehört zu den wenigen Baumarten Mitteleuropas, die zur biologischen Stickstoff-Fixierung (BNF) befähigt sind. In dieser Studie soll der jährliche Eintrag von Stickstoff (N) aus der biologischen N-Fixierung der Robinie in Kurzumtriebsplantagen und Agroforstsystemen abgeschätzt werden. Y1 - 2013 IS - 2 SP - 40 EP - 42 ER - TY - CHAP A1 - Hüttl, Reinhard F. A1 - Flühler, Hannes A1 - Gerke, Horst H. A1 - Maurer, Thomas A1 - Schneider, Anna ED - Hüttl, Reinhard F. ED - Kögel-Knabner, Ingrid ED - Schulin, Rainer ED - Gerwin, Werner T1 - Project C5 – Development of a structure and process model T2 - Structures and processes of the initial ecosystem development phase in an artificial water catchment (Final report CRC/TR 38) Y1 - 2013 UR - http://opus.kobv.de/btu/volltexte/2013/2865/ SP - 101 EP - 110 PB - BTU, Forschungszentrum Landschaftsentwicklung und Bergbaulandschaften (FZLB) CY - Cottbus ER - TY - CHAP A1 - Hüttl, Reinhard F. A1 - Schulin, Rainer A1 - Schneider, Bernd Uwe A1 - Boldt-Burisch, Katja A1 - Felderer, Bernd ED - Hüttl, Reinhard F. ED - Kögel-Knabner, Ingrid ED - Schulin, Rainer ED - Gerwin, Werner T1 - Project B1 – Spatio-temporary development of root growth, decay and exudation in the initial phase of the ecosystem genesis T2 - Structures and processes of the initial ecosystem development phase in an artificial water catchment (Final report CRC/TR 38) Y1 - 2013 SP - 45 EP - 49 PB - BTU, Forschungszentrum Landschaftsentwicklung und Bergbaulandschaften (FZLB) CY - Cottbus ER - TY - CHAP A1 - Kögel-Knabner, Ingrid A1 - Bens, Oliver A1 - Hüttl, Reinhard F. A1 - Fischer, Thomas A1 - Dümig, Alexander A1 - Spröte, Roland ED - Hüttl, Reinhard F. ED - Kögel-Knabner, Ingrid ED - Schulin, Rainer ED - Gerwin, Werner T1 - Project A3 – Initial stages of humus development T2 - Structures and processes of the initial ecosystem development phase in an artificial water catchment (Final report CRC/TR 38) Y1 - 2013 SP - 25 EP - 35 PB - BTU Forschungszentrum Landschaftsentwicklung und Bergbaulandschaften (FZLB) CY - Cottbus ER - TY - CHAP A1 - Hüttl, Reinhard F. A1 - Kögel-Knabner, Ingrid A1 - Schulin, Rainer A1 - Gerwin, Werner ED - Hüttl, Reinhard F. ED - Kögel-Knabner, Ingrid ED - Schulin, Rainer ED - Gerwin, Werner T1 - Introduction T2 - Structures and processes of the initial ecosystem development phase in an artificial water catchment (Final report CRC/TR 38) Y1 - 2013 SP - 1 EP - 10 PB - BTU, Forschungszentrum Landschaftsentwicklung und Bergbaulandschaften (FZLB) CY - Cottbus ER - TY - CHAP A1 - Böhm, Christian A1 - Kanzler, Michael A1 - Freese, Dirk ED - Poppy, Laura ED - Kort, John ED - Schroeder, Bill ED - Pollock, Tricia ED - Soolanayakanahally, Raju T1 - Fast growing tree species in alley cropping systems and their influence on microclimate in Germany T2 - Conference Proceedings, 13th North American Agroforestry Conference, 19-21 Juni 2013 in Charlottetown, Kanada Y1 - 2013 SP - 97 EP - 104 CY - Charlottetown, Prince Edwards Island, Canada ER - TY - CHAP A1 - Böhm, Christian T1 - Effekte agroforstlicher Landnutzung auf Mikroklima, Bodenfruchtbarkeit und Wasserqualität T2 - Tagungsband zum 2. Internationalen Kongress Agrarholz 2013, am 19. und 20.02.2013 in Berlin, Deutschland Y1 - 2013 SN - 978-3-942147-12-5 SP - 398 EP - 412 PB - FNR CY - Gülzow ER - TY - THES A1 - Spröte, Roland T1 - Entwicklung von Benetzungshemmung auf sandigen Substraten unter dem Einfluss biologischer Bodenkru sten und höherer Vegetationsentwicklung N2 - Mit dieser Arbeit wurde der Einfluss von biologischen Bodenkrusten auf die Benetzungshemmung / Hydrophobizität auf sandigen, anthropogen geschütteten, rekultivierten Böden der Tagebaufolgelandschaft und auf sandigen, sich mehr oder weniger natürlich entwickelnden Böden in Flugsandarealen und Dünengebieten Südbrandenburgs untersucht. Gezeigt wurde, dass sich in der Bergbaufolgelandschaft auf dem sandigen anthropogen geschütteten Substrat andere Krustenarten auf der Substratoberfläche ansiedeln als auf der Substratoberfläche von Flugsandgebieten und Dünen. Der Effekt der Benetzungshemmung ist bei den Krustenarten der rekultivierten Bergbauflächen stärker ausgeprägt als bei den natürlichen Flugsandgebieten und Dünen, wo die Benetzungshemmung im Krustentstadium mit Einfluss von Moosen wieder zurückgeht. Gerade Flechten haben in Bergbaufolgelandschaften negativen Einfluss auf die Infiltration von Niederschlag. Auch die Bindungskräfte zwischen den Partikeln spielen bei der Betrachtung des Einflusses der Benetzungshemmung / Hydrophobizität eine Rolle, denn es zeigt sich bei Betrachtung der Korngrößenverteilung, dass das Substrat in den Rekultivierungsgebieten der Bergbaufolgelandschaft unsortiert ist und hohe Anteile an Feinmaterial (Schluff und Ton) aufweisen kann. Auf den Flugsandgebieten findet eine natürliche Sortierung der Partikel durch Wind und Wasser statt, wobei das Substrat meist locker lagernd vorkommt und lediglich im Lee von höheren Pflanzen zur Ruhe kommen kann. Dort übernehmen dann biologische Bodenkrusten und andere Mikroorganismen die Bindung und Festigung der Partikel z. B. durch extrazelluläre polymere Substanzen. Es wurde deutlich, dass die Akkumulation organischer Substanz bei Bewuchs mit Laubgehölzen in größerem Maße stattfindet als bei Bewuchs mit Nadelgehölzen. Jedoch weisen die Chlorophyll a-Gehalte auf mehr Biomasse durch biologische Bodenkrusten bei den Nadelgehölzen hin. Insgesamt ist festzuhalten, dass jeder untersuchte Standort separat für sich betrachtet werden muss und nicht von einer Chronosequenz im Sinne einer eindeutig zeitlichen Abfolge bei Betrachtung der Alter der Standorte ausgegangen werden kann. Lediglich die Standorte in der Bergbaufolgelandschaftfür sich sowie die Standorte in den relativ natürlich entwickelten Flugsand- und Dünengebieten können gemeinsam betrachtet werden. Wie gezeigt wurde, beeinflussen biologische Bodenkrusten gerade schon in der Initialphase der Bodenbildung den Wasserhaushalt durch Porenverschluss, durch hydrophob wirkende Exsudate, aber auch durch Rhizoide der Moose, insbesondere im brandenburgischen Übergangsklima vom maritimen zum kontinentalen Klima. Durch die Regulierung des Wasserhaushalts des Bodens durch die biologischen Bodenkrusten wird die Bodenentwicklung in bestimmte Richtungen gelenkt. Hierfür sind allerdings Langzeitbeobachtungen und eine möglichst gewissenhafte Auswahl an Chronosequenzen notwendig. Y1 - 2013 PB - BTU, LS Bodenschutz und Rekultivierung CY - Cottbus ER - TY - CHAP A1 - Halke, Christian A1 - Gypser, Stella A1 - Mantovani, Dario A1 - Lebzien, Stefan A1 - Freese, Dirk A1 - Veste, Maik ED - Jeltsch, Florian ED - Joshi, Jasmin T1 - Yield, transpiration and growth of the new bioenergy crop IGNISCUM Candy under different water regimes T2 - GfÖ 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany N2 - 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. Y1 - 2013 UR - http://www.gfoe-2013.de/download/130905_GFOe_2013_Abstracts.small.pdf SP - 32 EP - 33 ER - TY - CHAP A1 - Zaplata, Markus Klemens A1 - Kollmann, Johannes A1 - Ulrich, Werner A1 - Winter, Susanne A1 - Schaaf, Wolfgang A1 - Elmer, Michael A1 - Gerwin, Werner A1 - Fischer, Anton ED - Jeltsch, Florian ED - Joshi, Jasmin T1 - Cover balance or degree of autocorrelation? It is the same and integratively traces pattern formation during succession T2 - GfÖ 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany N2 - It is widely acknowledged that increasing complexity is a key attribute of ecosystem genesis. This is particularly true for primary succession on homogeneous substrates. However, a mechanistic understanding of spatial colonisation and pattern formation during primary succession has not been achieved yet. Thus, we studied this topic for 7 years within an experimental catchment (6 ha) established in the post-mining landscape of eastern Germany. Equidistant permanent plots (120 plots à 25m²) allowed for autocorrelation analyses, and thus tracing the spatial development of species cover performance. For each species tested, the “cover balance” first increased due to colonization, while decreasing in the course of succession. Drawing a benefit from these temporal trends, we suggested cover balance levels revealed by autocorrelation analyses to best indicate well-defined phases in primary succession at spatial entities. Hence, with the help of this spatial approach, terrestrial succession can be understood now much better at the most general level of the hierarchy provided by Pickett et al. (1987). In accordance with these authors, at subordinated levels of the causal hierarchy differential species performance might get collectively explained by contributing processes or conditions, such as ecophysiological traits, life history strategies, competition and allelopathy of the occurring plant species. Further research is needed to understand their relative contributions to the pattern formation. Y1 - 2013 UR - http://www.gfoe-2013.de/download/130905_GFOe_2013_Abstracts.small.pdf SP - 228 EP - 229 ER - TY - CHAP A1 - Risse-Buhl, Ute A1 - Hagedorn, Frank A1 - Dümig, Alexander A1 - Gessner, Mark O. A1 - Schaaf, Wolfgang A1 - Nii-Annang, Seth A1 - Gerull, Linda A1 - Mutz, Michael ED - Jeltsch, Florian ED - Joshi, Jasmin T1 - Dynamics, chemical properties and bioavailability of DOC in an early successional catchment T2 - GfÖ 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany N2 - The dynamics of dissolved organic carbon (DOC) have been intensively studied in mature ecosystems, but little is known about DOC dynamics and the significance of DOC as a substrate for microbial activity in early-successional catchments. We determined the concentration, chemical composition, radiocarbon age, and bioavailability of DOC along the hydrological flow path from soil solution to a downstream pond in a recently constructed catchment (Chicken Creek Catchment, Germany). Soil solution, upwelling ground water, subsurface water in an alluvial fan, and pond water all had high DOC concentrations (averaged 6.0 – 11.6 mg DOC L‐1), despite small carbon stocks in either vegetation or soil of the catchment. The mean 14C age of DOC in upwelling ground water was 2600 to 2800 years. Solid-state CPMAS 13C NMR revealed a higher proportion of aromatic compounds (32%) and a lower proportion of carbohydrates (33%) in upwelling ground water compared to pond water (18% and 45%, respectively). 14C age and 13C NMR spectra suggest that DOC was partly mobilized from charred organic matter inherent in the Quaternary substrate. In a 70-days incubation experiment, 20% of the total DOC was found to be bioavailable, irrespective of the water type. Origin of the microbial communities within the catchment (enriched from soil, stream sediment or pond water) had only marginal effects on overall DOC utilization. Overall, our data suggest that both recent and old DOC support microbial activity during early ecosystem succession, although a large fraction of the DOC is recalcitrant and eventually exported from the catchment once it has been mobilized. Y1 - 2013 SP - S. 377 PB - Gesellschaft für Ökologie CY - Berlin ER - TY - CHAP A1 - Mantovani, Dario A1 - Veste, Maik A1 - Boldt-Burisch, Katja A1 - Fritsch, Simone ED - Jeltsch, Florian ED - Joshi, Jasmin T1 - Black locust (Robinia pseudoacacia L.) root growth response to different irrigation regimes T2 - GfÖ 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany N2 - Robinia pseudoacacia L. is a pioneer tree species native from North America. Its original range is a climatic region classified as humid to sub-humid, with a mean annual precipitation of 1020 to 1830 mm. However, it grows under a wide range of edaphic and climatic conditions and the species has proven to be relatively drought tolerant. In central Europe, with a continental climate, the species has been successfully cropped for biomass production also on marginal land, even in post-­‐mining areas characterized by water limitation and harsh edaphic conditions. Due its drought tolerance, fast resprouting rate and its ability to live in symbiosis with Rhizobia and thus fix atmospheric nitrogen, black locust could become a key species for short-­‐rotation plantation on marginal land. Several studies have been already carried out to quantify the black locust above ground production and its water use efficiency. However, the relation between the black locust biomass allocation, root system development and plant water use has still to be examined. In our study we evaluated the drought stress effect on black locust below ground biomass production, root distribution, and the root and rhizobial association. Different irrigation regimes were chosen to test the plant’s performance in a lysimeter experiment, under semi-­‐controlled environmental conditions, for the duration of two vegetation periods. From the results obtained we determined the root biomass allocation under different irrigation regimes and identified the close relation between the soil water condition and the rhizobial association. Y1 - 2013 UR - http://www.gfoe-2013.de/download/130905_GFOe_2013_Abstracts.small.pdf SP - 33 EP - 34 ER -