Effect of soil moisture on biological nitrogen fixation in pot grown Phaseolus vulgaris L.
1994
Jamro G.H. | Posypanov G.S. | Posypanov V.N. | Kobzova T.P. | Koshken Y.E. | Buriro U.A.
The effect of soil moisture on nodulation, leghaemoglobin content and biological nitrogen fixation were studied at different ontogenetic stages of Phaseolus Cv. Motalskobelia grown in pots containing 6 kg of podzol soil at Moscow Agricultural Academy. The data illustrated that higher and lower moisture levels reduced nitrogen fixation (C2H2 reduction). Lower levels of moisture drastically decreased nodulation, leghaemoglobin content of nodules and N2 fixation than higher moisture levels of soil. Comparing the ontogenetic stages of crop it was observed that C2H2 reduction and leghaemoglobin content of nodules increased from budding till pod filling and there after decreased. It is concluded that symbiotic nitrogen fixation in Phaseolus (Field bean) is positively correlated with moisture level, which was higher at 16-20 percent moisture content of soil and among the ontogenetic stages it was maximum at pod filling.
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