Effect of nitrogen levels andRhizobiumstrains on symbiotic N2fixation and grain yield ofPhaseolus vulgarisL. genotypes in normal and saline-sodic soils
✍ Scribed by Raman Rai
- Publisher
- Springer
- Year
- 1992
- Tongue
- English
- Weight
- 631 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0178-2762
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✦ Synopsis
40.0 mg N kg -1 in normal and saline-sodic soils, only two Phaseolus vulgaris genotypes (HUR 137 and VL 63) and two Rhizobium spp. strains (ND 1 and ND 2) produced maximum nodulation, nitrogenase activity, plant N contents, and grain yields in saline-sodic soil, with 12.5 mg N kg -~, compared with the other strains. However, interactions between strains (USDA 2689, USDA2674, and ND5) and genotypes (PDR14, HUR 15, and HUR 138) were significant and resulted in more nodulation, and greater plant N contents, nitrogenase activity, and grain yields in normal soils with 12.5 mg N kg-1 compared with salt-tolerant strains. Higher levels of N inhibited nodulation and nitrogenase activity without affecting grain yields. To achieve high crop yields from saline-sodic and normal soils in the plains area, simultaneous selection of favourably interacting symbionts is necessary for N economy, so that bean yields can be increased by the application of an active symbiotic system.