黑龙江省水直播田杂草药剂系统防控技术

Prevention and Control Technology of Herbicide to Weeds of Water Direct Seeding Rice in Heilongjiang Province

本文应用"二封一补"的策略完成黑龙江省水直播田杂草的药剂系统防控试验,结果表明,在16个有效处理中,处理5(25%噁草酮EC+25%丙炔噁草酮OD+10%吡嘧磺隆WP,50%丙草胺EC+33%嗪吡嘧磺隆WG,5%五氟磺草胺OD+30%氰氟草酯OD)防控效果最好,对总杂草的株数相对防效和鲜质量相对防效均为100%,产量也最高,达到7.77 t/hm^(2);处理6(25%噁草酮EC+25%丙炔噁草酮OD+10%吡嘧磺隆WP,50%丙草胺EC+33%嗪吡嘧磺隆WG,5%五氟磺草胺OD+48%灭草松AS)防控效果次之,对总杂草的株相对防效和鲜质量相对防效分别为99.92%和99.74%,产量也较高,达到7.65 t/hm^(2)。此外,从首次出苗率、分蘖动态、株高动态、千粒重和结实率等指标来看,各处理间差别很小,无药害问题。

The test of herbicide system control to weeds of water direct seeding rice was carried out in Heilongjiang province.The main results indicated as follow:among the 16 treatments,the treatment 5(25%oxadiazon EC+25%oxadiargyl OD+10%pyrazosulfuron WP,50%pretilachlor EC+33%metazosulfuron WG,5%penoxsulam OD+30%cyhalofop-butyl OD)had the best control effects with 100%relative control effects on weed number and weed fresh weight,and the highest yield reaching 7.77 t/hm^(2).The control effects of treatment 6(25%oxadiazon EC+25%oxadiargyl OD+10%pyrazosulfuron WP,50%pretilachlor EC+33%metazosulfuron WG,5%penoxsulam OD+48%bentazon AS)was the second,the relative control effects of weed number and weed fresh weight were 99.92%and 99.74%,respectively,and the rice yield was the second,reaching 7.65 t/hm^(2).In addition,judging from the results of first emergence rate,tiller dynamics,plant height,1000-grain weight and seed setting rate,the differences between all treatments are small and there were no herbicide damage problem.