International Journal of Soil Science and Agronomy ISSN: 1725-3497 Vol. 3 (1), pp. 079-086, October, 2016.  © Advanced Scholars Journals

Full length Research paper

Use of phosphorus from various sources by genotypes of indiscriminate soybean and cowpea in a low-phosphorus savanna soil

G. D. Nuwoko

Rubber Research Institute of Nigeria (RRIN), Iyanomo, Edo State, Nigeria,

E-mail: [email protected]

Accepted 20 September,2016

Abstract

The differential capacity of genotypes of soybean (Glycine max) and cowpea (Vigna unguiculata) to flourish under low-phosphorus (P) conditions by using P from sources with low solvency was evaluated in a nursery concentrate on with a low-P savanna soil gathered from an examination field in Fashola, south-western Nigeria. The P sources included (21 mg P kg-1 soil) were calcium phosphate (Ca-P), press phosphate (Fe-P), aluminum phosphate (Al-P), and triple superphosphate (TSP). Soil without P expansion served as a control. The soybean genotypes were TGm 1039, TGm 1196, TGm 1293, TGm 1360, TGm 1420, TGm 1511, and TGm 1540. The cowpea genotypes were Dan - ila, IT89KD-349, IT89KD-391, IT90K-59, and IT82D-716. Almost all the soybean genotypes altogether expanded their shoot dry matter yield (DMY) and collection of P from the different sources when contrasted and the control; the positioning for P obtaining was control

 Key words: P sources, cowpea, genotypes, soybean, savanna soil, aluminum phosphate, superphosphate.