ANALYSIS OF THE BEHAVIOR OF Rhizobium INOCULUM USING MARKED STRAIN IN THE RHIZOSPHERE OF SOYBEANS
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概要
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The behavior of the inoculum, Rhizobium japonicum strain A-1016 str^+ used as a marker strain, in the rhizosphere of soybean (Glycine max, cv. Enrei) was examined and the effect of the inoculation in Andosols from Japan was evaluated using the acetylene reduction technique and by comparing the number of nodules formed by the inoculum strain under greenhouse conditions. The survival rate of the inoculum strain in the two soils was also studied in the laboratory. The results of this experiment indicated the beneficial effect of inoculation with r. japonicum A-1016 str^+ in Soil A (from paddy field) which is considered to contain a low population of native rhizobia able to nodulate soybean as reflected by the seed yield, level of accumulated nitrogen, acetylene reduction activities, and high recovery percentage of inoculated rhizobia. Also, a high survival rate of the inoculum strain was observed in this soil. On the other hand, the absence of the beneficial effect associated with the inoculation was demonstrated in Soil B (from upland field). The soil was considered to contain a high population of the native rhizobia to which the inoculum strain proved to be less competitive. Total recovery percentage of inoculated rhizobia ranged from 34 to 47% in the inoculated treatments. The low survival rate of the inoculum strain in this soil also accounted for the limitted inoculation effect.
- 社団法人日本土壌肥料学会の論文
著者
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Yoshida Tomio
Institute Of Applied Biochetnistry University Of Tsukuba
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Watanabe Y
Central Res. Inst. Electric Power Ind. Chiba Prefecture Jpn
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WATANABE Yoshitomo
Institute of Applied Biochemistry, University of Tsukuba
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Yoshida Tomio
Institute Of Applied Biochemistry University Of Tsukuba
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Yoshida Tomio
Institute Of Applied Biochemistry The University Of Tsukuba
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