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《Journal of Anhui Agricultural Sciences》 2010-22
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Research on the Composition in the Exudate from Root System of Continuous Cropping Soybean and Its Allelopathy

LIU Cheng et al (College of Agronomy,Northeast Agricultural University,Harbin,Helongjiang 150030)  
[Objective] The composition in the exudates from continuous cropping soybean root was identified and its allelopathy was studied.[Method] The component in the exudate of soybean root was identified with the method of GC-MS analysis.The physiological and biochemical mechanism including the morphological index,the cell membrane structure and its function,the activity of the protective enzymes etc in the soybean growth under the different concentrations of root exudates with itself toxic effect,which was simulated,was more systematically studied.[Results] cropping The components of the exudates from soybean root mainly included hydrocarbon,organic acid,alcohol,ester,ketone,phenol,formaldehyde,benzene,thiazole,amide and others.These components showed the promotion to content of chlorophyll in tested soybean while it was with low concentration and the inhibition,with high concentration.These components had the obvious inhibition to the soybean seed germination and its germination rate and the inhibition was strengthened with the concentration-increasing.The trend of the activity of SOD and POD,the content of MDA in tested soybean was continually rising with the concentration-increasing of exudates from soybean root and the allelopathic reached the significant level.[Conclusion] The theoretical basis for alleviation and even elimination of the barrier of repeated tillage was provided.
【Fund】: 黑龙江省自然科学基金重点项目(ZJN0701)
【CateGory Index】: S565.1
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