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为明确臭氧对韭菜迟眼蕈蚊Bradysia odoriphaga的毒力及对韭菜和土壤环境安全性的影响采用室内生测法测定了臭氧对3龄幼虫、蛹和成虫的毒力,并测定了臭氧水对韭菜种子的影响及对土壤环境的安全性。结果显示,臭氧对韭菜迟眼蕈蚊3龄幼虫和蛹均有较高的毒力,LC_(50)分别为3.79 mg/L和4.95 mg/L;对其成虫的毒力稍弱,LC_(50)为61.52 mg/m~3。臭氧水浓度为4.50 mg/L时对韭菜种子萌发和幼苗生长促进效果最显著,发芽率、根长和芽长较对照分别显著增加了22.29%、14.11%和4.75%。4.50 mg/L臭氧水处理土壤后,细菌、真菌和放线菌数量较对照分别显著下降了91.91%、85.71%和59.99%;土壤pH提高了2.07%,速效钾含量显著上升了313.19%,有效磷、氨态氮、有机质的含量分别下降了4.69%、18.75%、35.44%。表明臭氧对韭菜迟眼蕈蚊3种虫态均有杀伤作用,且对韭菜种子萌发和幼苗生长有良好的安全性,但对土壤环境有一定影响。
To clarify the effect of ozone on the virulence of Bradysia odoriphaga and the environmental safety of Chinese chive and soil, the toxicity of ozone to 3rd instar larvae, pupae and adults was determined by indoor method. Effects of Leek Seeds and Their Safety on Soil Environment. The results showed that ozone had higher virulence to 3rd instar larvae and pupae of Lentinula edodes, LC 50 (3.79 mg / L and 4.95 mg / L, respectively) 50) is 61.52 mg / m ~ 3. The effect of ozone water concentration of 4.50 mg / L on seed germination and seedling growth was the most significant, and the germination rate, root length and shoot length increased significantly by 22.29%, 14.11% and 4.75% respectively compared with the control. 4.50 mg / L ozone water treatment soil, the number of bacteria, fungi and actinomycetes significantly decreased by 91.91%, 85.71% and 59.99% compared with the control; soil pH increased 2.07%, available potassium increased significantly 313.19%, effective Phosphorus, ammonia nitrogen and organic matter decreased by 4.69%, 18.75% and 35.44% respectively. The results showed that ozone had killing effects on three kinds of larvae of Myzus persicae and its safety to seed germination and seedling growth of leek. However, it had a certain impact on soil environment.