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通过喷施杀虫剂氰戊·乐果,取样测试油桐幼苗生长情况,分析土壤理化性质的变化,探讨氰戊·乐果对油桐幼苗生长和土壤理化性质的影响效应,为油桐的害虫防治及管理提供科学依据.结果表明:对盆栽的油桐幼苗按照氰戊·乐果使用方法施用3个月后,土壤的pH、全磷和全钾含量均无明显影响,可显著提高土壤中的碱解氮、速效磷和速效钾含量,却使得土壤有机质和全氮含量明显降低,对油桐的生长影响不显著.可见,在一定的剂量范围内,氰戊·乐果可被广泛用作油桐的杀虫剂,其对土壤和植物生长影响不大,但长期施用,可导致土壤板结.
By spraying pesticide cypermethrin and dimethoate, the seedling growth of tung oil tree was sampled to analyze the changes of soil physical and chemical properties. The effect of cypermethrin on dimethoate seedling growth and soil physical and chemical properties was discussed. Pest control and management.Results showed that after three months application of potterytum seedlings in accordance with the use of cypermethrin dimethoate, the soil pH, total phosphorus and total potassium content had no significant effect, can significantly improve the soil However, the content of soil organic matter and total nitrogen decreased obviously and the effect on tung tree growth was insignificant.It can be seen that within a certain dose range, cypermethrin and dimethoate can be widely used Used as a tung oil insecticide, which has little effect on soil and plant growth, but long-term application can lead to soil compaction.