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[目的]细菌Enterobacter sp.可高效降解土壤中残留的莠去津,为明确其施用效果和环境安全性,对不同处理的大豆生长、药害指标和根围微生物进行了调查和比较。[方法]试验设3组处理,分别为莠去津+细菌处理、莠去津处理和空白对照,观察各处理中的幼苗生长情况和药害指标、成熟期植株生理和药害指标、成熟期根围微生物的数量和活度。[结果]在莠去津+细菌处理中,大豆各时期的生长指标均与空白对照接近,且无明显药害,显著优于莠去津单独处理。根围微生物调查结果也表明,添加细菌处理的微生物数量与活度显著高于对照和莠去津处理。[结论]试验菌株能有效缓解莠去津对大豆的伤害,并能促进根围微生物的数量和活性,环境安全性较高。
[Objective] Enterobacter sp. Was used to efficiently decompose the atrazine residue in the soil. In order to clarify its application effect and environmental safety, the growth, phytotoxicity index and rhizosphere microorganisms of different treatments were investigated and compared. [Method] The experiment was divided into 3 groups: atrazine + bacterial treatment, atrazine treatment and blank control. The seedling growth and injury index, the physiological and phytotoxicity index of mature plant, maturity stage Root circumference of the number and activity of microorganisms. [Result] In the atrazine + bacteria treatment, the growth indexes of soybean in all stages were close to the blank control without significant phytotoxicity, which was significantly better than that of atrazine alone. According to the results of the survey on the microorganisms in the rhizosphere, the quantity and activity of microorganisms added with bacteria were significantly higher than those of the control and atrazine. [Conclusion] The test strain can effectively alleviate the harm of atrazine to soybean and promote the quantity and activity of microorganisms in the rhizosphere, which has high environmental safety.