Title: Effect of combined inoculation of Azospirillum and Rhizobium on nodulation and N2-fixation of winged bean and soybean
Abstract: Different strains of winged bean and soybean Rhizobium were tested with several strains of Azospirillum for combined inoculation in winged bean and soybean under temperate and tropical conditions. Substantial increases in nodulation, N2-fixation, shoot dry matter production and N-gain due to the mixed inoculation were obtained in some combinations of these bacteria. The response to combined inoculation was mainly dependent upon the genotypes (strains) of these organisms. The influence of Rhizobium-genotype in expressing the associative effect was more decisive than that of Azospirillum. Cell-free extract of Azospirillum produced the same effect as that of the organism itself, while the culture supernatant also showed the same in some instances. The cell-free extract of Azospirillum strain KUL-X considerably reduced nodulation, N2-fixation and N-gain of the Rhizobium strain RRIM-56, which was not otherwise affected by mixed inoculation. The combination of Azospirillum strain KUL-Y and Rhizobium strain KUL-BH produced the highest values of nodulation, N2 - fixation and N-gain of all the Azospirillum—Rhizobium combinations in winged bean.
Publication Year: 1983
Publication Date: 1983-07-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 59
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