TY - GEN A1 - Kanzler, Michael A1 - Böhm, Christian A1 - Quinkenstein, Ansgar A1 - Steinke, Christian A1 - Landgraf, Dirk T1 - Wuchsleistung der Robinie auf Lausitzer Rekultivierungsstandorten T2 - AFZ - der Wald Y1 - 2014 IS - 5 SP - 35 EP - 37 ER - TY - GEN A1 - Böhm, Christian A1 - Landgraf, Dirk A1 - Makeschin, Franz T1 - Effects of two contrasting agricultural land-use practices on nitrogen leaching in a sandy soil of Middle Germany T2 - Journal of Plant Nutrition and Soil Science Y1 - 2009 U6 - https://doi.org/10.1002/jpln.200700104 SN - 1522-2624 VL - 172 IS - 3 SP - 408 EP - 417 ER - TY - GEN A1 - Böhm, Christian A1 - Landgraf, Dirk A1 - Makeschin, Franz T1 - Changes in total and labile carbon and nitrogen contents in a sandy soil after the conversion of a succession fallow to cultivated land T2 - Journal of Plant Nutrition and Soil Science Y1 - 2010 SN - 1522-2624 VL - 173 IS - 1 SP - 46 EP - 54 ER - TY - GEN A1 - Carl, Christin A1 - Biber, Peter A1 - Veste, Maik A1 - Landgraf, Dirk A1 - Pretzsch, Hans T1 - Key drivers of competition and growth partitioning among Robinia pseudoacacia L. trees T2 - Forest Ecology and Management N2 - Competition for above- and below-ground resources depends on their availability and results in varied growth partitioning. This becomes clear as the supply and limitation of the main resources influence the slope of the size-growth relationship in stands. Nevertheless, growth partitioning among trees, especially among black locust (R. pseudoacacia) trees is not understood in sufficient detail. To scrutinize and estimate the mode of competition of R. pseudoacacia, this research analyzed 1333 trees in Germany in 10 study sites, consisting in total 27 sample plots, with similar climate but varying soil conditions. The stand age ranged from 2 to 32 years, with a diameter at breast height ranging from 0.6 to 29.1 cm. The main focus of the study was to evaluate the impact of nitrogen, phosphorus, and water supply on the competition mode of R. pseudoacacia by varying growth partitioning. We applied the size–growth relationship in a mixed-effects model with a random intercept and slope. Fixed effects were the basal area, phosphorus, water, the sunlight competition index, and the interactions between below- and above-ground resources. Site specific effects of the analyzed stands were quantified with the aid of the random effects. Depending on the supply and limitation of phosphorus and water, this study determined how the competition mode as well as the growth partitioning among R. pseudoacacia trees were influenced. Hence, if phosphorus and water availability increased, then the competition for above-ground resources (primarily sunlight) and the slope of the size–growth relationship increased. Large trees grew disproportionately more than smaller trees. If the available phosphorus and water decreased, then the competition for the below-ground resources increased and the slope of the size–growth relationship decreased – to be more flattened. Moreover, it was found that available nitrogen as a below-ground resource had no influence on the mode of competition. In summary, phosphorus was the most important nutrient and, together with water, was the main driver of growth partitioning among R. pseudoacacia trees. Y1 - 2018 U6 - https://doi.org/10.1016/j.foreco.2018.08.002 SN - 0378-1127 VL - 430 SP - 86 EP - 93 ER -