摘要
采用室内试验方法研究了毒死蜱及其代谢产物对土壤过氧化氢酶活性的影响。结果表明,毒死蜱浓度不同对土壤过氧化氢酶活性影响也不同,浓度越高,影响越强烈。在毒死蜱浓度为10、40、80μg·g-1时,其影响过程为先抑制—再激活—最后恢复稳定,在试验初期低浓度表现激活作用,高浓度表现抑制,且浓度越高,抑制越强。随着时间的推移,各浓度均表现为激活作用,且最大激活作用随毒死蜱浓度的增加而增加。毒死蜱的水解产物对供试土壤过氧化氢酶活性的影响均大于毒死蜱原药,而光解产物对土壤过氧化氢酶活性的影响小于毒死蜱原药。随着光照时间的延长,毒死蜱光解产物对土壤过氧化氢酶活性的影响减弱,即对供试土壤生态环境影响减弱。
Influence of chlorpyrifos and its metabolites on catalase activity in soil was investigated. The results showed that activity of catalase was influenced by concentration of chlorpyrifos used, with a steadily stronger influence at higher concentration. At the dosages of 10,40,80 μg·g-1, the process of inhibition-stimulation-recover was displayed. The activity of catalase was strongly stimulated at the concentration of 80 μg·g-1. The effect of chlorpyrifos through hydrolysis on catalase activity in soil was more than that of chlorpyrifos. However, the effect of chlorpyrifos through photolysis on catalase activity in soil was less than that of chlorpyrifos. The effect decreased with the prolonging time of photolysis. It may be suggested that the photo-degradation of chlorpyrifos decrease the influence on ecological environment of soil.
出处
《农业环境保护》
CSCD
北大核心
2002年第6期553-555,共3页
Agro-Environmental Protection
基金
国家自然科学基金资助项目(29877010)
