Growth, nutrient uptake and nodulation of two legumes in relation to rhizobium strain and soil acidity [Philippines]
1986
Migo, V.P.
Two legumes, mungbean and soybean and four rhizobium strains were tested for their performance at different levels of soil acidity. The response was evaluated on the basis of growth, nitrogen and phosphorus content and uptake and nodulation. For both legumes, growth, nodulation and nutrient uptake were higher at pH 5.9 than at pH 4.35. Between mungbean varieties, Pagasa 3 performed better than Pagasa 1 in terms of growth and nodulation. Inoculation with strain M6 effected more nodulation in Pagasa 1 than Pagasa 3 and Bvr 7 performed better with Pagasa 3 as the host plant. For soybean, varietal difference was exhibited in terms of growth and nutrient concentration and uptake. Clark 63 was better than TK-5. In the more acid soil, USDA 110 was significantly better than BGm5 in terms of nodulation. Increasing exchangeable aluminum in the soil reduced growth, nodulation and nutrient concentration and uptake for both legumes. Possible amelioration of aluminum toxicity by liming and phosphorus addition were studied. Growth and nodulation response to liming and phosphorus addition were attributed to reduction in exchangeable aluminum, increase in calcium and phosphorus supply and provision for a more favorable pH for rhizobial activity
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