N2 fixation and growth of legumes as affected by sulphur fertilization |
| |
Authors: | H W Scherer A Lange |
| |
Institution: | (1) Institute of Agricultural Chemistry, University of Bonn, Meckenheimer Allee 176, D-53115 Bonn, Germany |
| |
Abstract: | The influence of three sulphur application rates in combination with two nitrogen application rates on N2 fixation and growth of different legumes was investigated. N was applied as N-labelled 15NH4
15NO3. The 15N isotope dilution technique was used to estimate N2 fixation. At both N increments dry matter yield was highest with high S supply. Independently of the N supply, the high S application rate resulted in a significantly higher N accumulation, which was mainly caused by a higher N2 fixation rate. With the grain legumes the weight of nodules was increased by the high S application rate. The higher number of nodules per pot with optimum S supply was the result of a better root growth. Rates of acetylene reduction correlated significantly with S supply. |
| |
Keywords: | Sulphur Legumes N2 fixation Rhizobia Nitrogenase Nodulation Acetylene reduction assay 15N dilution technique |
本文献已被 SpringerLink 等数据库收录! |