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Soybean root nodules on soybean growth and have a great impact. Soybean nodulation by certain effects of rhizosphere bacteria. The major influencing factors, including chitinase, siderophore. In this study, using biochemical methods, isolated laboratory strains of rhizosphere bacteria chitinase enzyme qualitative determination and the production of siderophore qualitative determination, and reference to the relevant experimental data, combined with the existing research to a preliminary inquiry rhizosphere effect of bacteria on soybean nodulation. In the experiment, a total of 87 strains were determined, was found a total of 18 strains produced chitinase, sp15, sp25, sp33 更多：https://www.bmcx.com/ ,sp34, sp37, sp47-1 production of chitinase strong; a total of 34 strains capable of producing siderophore, sp11-2, sp15, sp24-2, sp27, sp29-sp29-sp40 sp54, sp60-1 production of siderophore. According to the experimental results initial screening of efficiently, a large production of chitinase, siderophore strains.

Soybean on the growth of soybean root nodules have a lot of influence. Soybean nodulation ability of bacteria in rhizosphere of some impact. Influencing factors include its chitinase, rail carriers. This research mainly use biochemical methods, the laboratory isolated strain of rhizosphere bacteria producing chitinase enzyme determination of qualitative and qualitative determination of siderophore production, and in the light of relevant experimental data, combined with existing relevant research, preliminary research on bacteria in rhizosphere of soybean nodulation ability of effects. In the experiment, a total of 87 determination of strains of bacteria, experimental science can chitinase producing strain of a total of 18, SP15, SP25, SP33,SP34, SP37 更多：https://www.bmcx.com/ , SP47-1 ability of producing chitinase; strain of siderophores produced a total of 34, SP11-2, SP15, SP24-2, SP27, SP29-2, SP29-3, SP40, SP54, SP60-1 iron carrier capability is strong. Elected under experimental results of preliminary screening efficiently, a large number of strains producing chitinase, rail carriers.

Soybean root for soybean growth have great influence on the role. And soybean nodular ability will be affected by the rhizosphere bacteria certain effect. The main influence factors including chitinase, iron carrier and so on. This research mainly using chemical method,The isolated strains of laboratory root interstate in bacteria chitinase quantitative determination and iron carrier in quantitative determination, and by referring to the relevant experimental data, based on the existing related research and preliminary inquiry to rhizosphere bacteria for soybean nodular ability influential role. In the study, of 87 strains of bacteria were determined,Experiments have found that can produce chitinase strains there were 18 strains, which SP15, SP25, SP33, SP34, SP37 更多：https://www.bmcx.com/ , SP47-1 production chitinase of strong ability; Ability to produce iron strains of carrier there were 34 strains, which SP11-2, SP15, SP24-2, SP27, SP29-2, SP29-3, SP40, SP54,SP60-1 iron carrier in relatively strong capacity. According to the result of the experiment were preliminary can efficiently, produce more chitinase, iron carrier strains.

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