抗除草剂油菜施用甲咪唑烟酸和阿特拉津对下茬作物水稻的影响

Effect of Imazapic Residues in Soil on Subsequently Planted Rice

2005—2006年抗除草剂油菜田施用除草剂甲咪唑烟酸和阿特拉津土壤残留对后茬水稻影响的田间小区试验结果表明,甲咪唑烟酸72、108ga.i./hm2(推荐用量范围)和高剂量144ga.i./hm2在油菜田施用后,推荐剂量范围内对后茬水稻的产量未造成显著影响,高剂量144ga.i./hm2对产量有显著影响,40%阿特拉津悬浮剂900、1200ga.i./hm2(推荐用量范围)和高剂量1800ga.i./hm2在油菜田施用后,推荐剂量范围内对后茬水稻的产量影响不显著,高剂量对水稻的产量有明显的影响。这一结果说明甲咪唑烟酸和阿特拉津在推荐剂量范围内在油菜田施用对后茬水稻的安全性。

The field trial on effect of residues of imazapic and atrizine herbicides in soil on subsequently planted rice were conducted during 2005-2006. The results showed that the effects of imazapic on rice yield reductions were not significant after the applying of imazapic 72 and 108 g a.i./ha,but the rice yield reduction were significant at the higher dosage of imazapic 144 g a.i./ha. The effects of atrizine on rice yield reductions were not significant after the applying of atrizine 900 and 12 00 g a.i./ha,the rice yield reduction were significant at the higher dosage of atrizine 1 800 g a.i./ha. This trial show that at the commended dosage of imazapic and atrizine,the subsequently rice could be planted safely.