Genetic variation in acquisition, and utilization of phosphorus from iron-bound phosphorus in pigeonpea

摘要: Abstract In earlier experiments it was observed that pigeonpea is one of the few crop species can utilize fixed forms soil-P, particularly iron-bound P (Fe-P). The present investigation aimed at assessing genotypic variation in uptake from Fe-P pigeonpea. Fifteen germplasm lines comprised genotypes different maturity groups and three wild relatives were grown vermiculite supplied with 15 mg either as or Ca-P for 60 d. Significant genetic observed; also P-use efficiency varied substantially among genotypes. Dry matter production positively correlated both under treatments (r=0.78**; r=0.63*; n=15). There no significant relation between dry production. Wild related did not show higher than cultivated From Fe-P, only 36% Ca-P. best study took up an amount ...