摘要
2000年我国农用农药需求量23.31万t。农田农药年负荷量和单次用量分别是1.78kg/hm^2和471.6g/hm^2;高毒农药和水溶性农药的用量分别是7.109万t和12.01万t。农药总排毒系数和每公顷的排毒系数分别是2794.36×10~6t/hm^2和21.50t/hm^2,使用杀虫剂的平均LD_(50)为48mg/kg。低效、高毒和水溶性农药生产量和使用量大是我国农药品种结构不合理的主要标志,优化这种农药品种结构是非常必要的。
In the year 2000, 233. Ikt of pesticides was needed in the agriculture of China. The annuale pesticide load of fields and the rate of one time application were 1. 78 kg/hm2 and 471. 6g/hm2 respectively. The application amount of high toxicity and water soluble pesticides was 71. 09kt and 120. 1 kt respectively. The toxicity discharge capacities of pesticides in total and for one hectare were 2794. 36 x 106t/hm2 and 21. 50t/hm2 respectively. The average LDso of used insecticides was 48mg/kg. The large production and application amount of low effective, high toxicity and water soluble pesticides was main indicator of inrational structure of pesticide sorts in China. The improvement of this pesticide sort structure was very necessary.
出处
《上海交通大学学报（农业科学版）》
2002年第z1期1-5,共5页
Journal of Shanghai Jiaotong University(Agricultural Science)
关键词
农药
环境影响评价
污染负荷
排毒系数
水溶性农药
pesticide
environmental impact assessment
pollution load
toxicity discharge capacity
water soluble pesticide
