水溶性农药稻田流失特性研究

Loss of water-resolvable pesticides from rice fields

通过大田试验和测坑试验,研究了水溶性农药的稻田流失特性及其影响因素,在此基础上得到了杀虫单和乐果的稻田流失量。结果表明:杀虫单的稻田排水流失量为208.0g·hm-2,渗漏流失量为222.0g·hm-2,总流失量为其稻季用量的14.3%;乐果的稻田排水流失量为238.5g·hm-2,渗漏流失量为160.8g·hm-2,总流失量为其稻季用量的13.4%。

Through fields-scale experiment and leaching-pond experiment,characteristics of the loss of water-resolvable pesticides from rice fields and their affecting factors were studied.In the experiment,the losses of monosaltap and dimethoate were estimated.The results show that the loss of monosultap by way of drainage and leakage was 208.0 and 222.0 (g·hm^(-2)),respectively,forming a total loss percentage of about 14.3%;while the loss of dimethoate via drainage and leakage was 238.5 and 160.8 g·hm^(-2),respectively,forming a total loss percentage of about 13.4% from the rice fields.