Obstacles of soybean continuous cropping Ⅲ.Mechanism of soybean yield increment by marine actinomyces MB-97

Abstract

Abstract: An isolate of marine actinomyces MB-97 identified as Streptomyces microflavus could successfully colonize in the rhizoshpere of soybean,and inhibit Penicillium purpurogenum, a soybean deleterious rhizospheric microorga-nisms. After applied MB-97, the ratio of bacteria/fungi in the rhizosphere of soybean was increased,and the soil became to be "Bacterial type" from "Fungal type". The populations of P. purpurogenum were apparently suppressed about 80%, and the harm of toxins in soil was weak. The soybean root rot caused by soilborne fungi such as Fusarium was decreased 50%, and MB-97 could stimulate the growth of soybean seedlings. In field study,the mean yield of soybean raised by 15.2%,implying that Streptomyces microflavus was an effective plant growth-promoting rhizobacteria on soybean.

CLC Number:

S565.1

HU Jiangchun, XUE Delin, WANG Shujin, He Bin, Wang Deming. Obstacles of soybean continuous cropping Ⅲ.Mechanism of soybean yield increment by marine actinomyces MB-97[J]. Chinese Journal of Applied Ecology, 2002, (9): 1095-1098.

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