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通过对土壤脲酶受杀虫双影响的研究．结果表明,杀虫双对不同生态区土壤脲酶活性具有明显的抑制作用,随杀虫双浓度的增加,酶活性持续减小、计算得到了土壤酶活性的生态剂量ＥＤ５０值,获得了北方(?)土和南方红壤污染的;临界浓度为４８９和２４６ｇ/ｋｇ;Ｌａｎｇｍｕｉｒ模型可较好表征酶活性与尿素浓度间的定量关系;土壤脲酶活性和最大表观酶活性均可表征土壤受杀虫双污染程度的大小。
Through the double effect on soil urease by insecticides. The results showed that the insecticidal double effect on soil urease activity was significantly inhibited in different ecological zones. With the increase of insecticidal double concentration, the enzyme activity continued to decrease, and the ecological dose ED50 value of soil enzyme activity was calculated. ) Soil and southern red soil; the critical concentrations were 489 and 246g / kg; Langmuir model could characterize the quantitative relationship between enzyme activity and urea concentration; soil urease activity and maximum enzyme activity could be characterized by soil biocide The degree of pollution.