氰戊·乐果对油桐生长及其土壤理化性质的影响

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.

On Effects of Fenvalerate -Dimethoate on Tung Oil Tree Growth and Soil Physicochemical Properties

By means of spraying fenvalerate_dimethoate ,testing seeding grow th ,analyzing the changes of soil physical and chemical properties ,exploring the influences of fenvalerate_dimethoate on tung oil tree seedling grow th and soil physicochemical properties ,it can provide a scientific basis for the pest control and management of tung oil tree .Results show that ,according to the method of the fenvalerate_dimethoate three months ,it has no significant effects on soil pH ,the content of total P and total K in the soil ;it obvi_ously increases the contents of available nitrogen ,available phosphorus and available potassium but de_crease the contents of organic matter and total N ;it has no significant effects on the grow th of tung oil tree .It indicates that fenvalerate_dimethoate can be widely used as pesticide of tung oil tree and have no impact on the soil and grow th of plant in a certain range .But long_term application of fenvalerate_dime_thoate can lead to soil harden .