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本研究结果表明,在土壤有机质含量2.25％～2.35％,土壤水分条件较好的情况下,不同浓度的赛克津除草剂进行土壤处理对大豆种子发芽和幼苗出土均无影响。施量高于0.25 kg/ha的各浓度处理对大豆幼苗均产生药害,药害程度随苗期的延长,用药浓度的增加而加重。开花期的株高和株重,各处理均低于对照。赛克津低浓度0.25 kg处理对大豆根瘤的共生固氮无不良影响;而0.5 kg以上浓度处理,对大豆根瘤的形成和株固氮总活性有较明显的抑制作用。成熟大豆植株的株高(除0.25 kg外),分枝数、荚数、株重及株粒重均低于对照,随用药浓度的增加而降低。赛克津除草剂对土壤中细菌,放线菌和霉菌在数量上有一定刺激作用。
The results of this study showed that soil organic matter content 2.25% ~ 2.35%, soil moisture conditions are good, different concentrations of metribuzin herbicide soil treatment on soybean seed germination and seedling unearthed had no effect. The application of higher than 0.25 kg / ha concentration of soybean seedlings have phytotoxicity, phytotoxicity with seedling extension, the increase of drug concentration and aggravate. The height and plant height at flowering stage were lower than those of the control. Saikunjin at a low concentration of 0.25 kg had no adverse effect on the symbiotic nitrogen fixation of soybean nodules, whereas the treatment at a concentration of 0.5 kg or more had a significant inhibitory effect on the formation of nodule and the total nitrogen fixation activity. Plant height (except 0.25 kg), number of branches, pods, plant weight and grain weight of mature soybean plants were lower than those of the control, and decreased with the increase of the drug concentration. Sikkim herbicide on the soil bacteria, actinomycetes and mold in a certain amount of stimulation.