不同除草剂对大豆田杂草的防治效果研究

Different Herbicide to Corn Field the Prevention and Cure Result Research of the Miscellaneous Grass

农药市场混乱,鱼目混珠,除草效果参差不齐;本文针对大豆生产中利用的3种除草剂的除草效果进行研究,为大豆生产上选出除草效果较佳的除草剂。在辽宁省营口监狱大豆试验地用28%乙嗪悬乳剂、50%乙草胺乳油、50%嗪草酮可湿性粉剂3种除草剂以喷雾法施药,药后40d进行调查,调查杂草的种类和株数、鲜重,计算株防效和鲜重防效来研究除草剂的除草效果。结果表明28%乙嗪悬乳剂2625ml/hm2的株防效达93.3%,鲜重防效达96.1%,28%乙嗪悬乳剂2325ml/hm2的株防效为92.2%,鲜重防效为94.5%,而50%嗪草酮可湿性粉剂1125ml/hm2的鲜重防效为94.9%,略高于28%乙嗪悬乳剂2175ml/hm2,但株防效为90.7%,效果一般的是50%乙草胺乳油2250ml/hm2。28%乙嗪悬乳剂2325～2625ml/hm2和50%嗪草酮可湿性粉剂1125kg/hm2,在播后苗前使用一次即可控制整个生育期杂草危害。

The agrochemical market is confusion, fish eye passes as pearl, The weeding effect is irregular. This text conducts the research in view of the weeding effect in soybean production, trying to produce the best herbicide among 3 weed killers for the soybean production. In Liaoning Province Yingkou jail soybean experimental field, We atomizes the law with 3 weed killers including 28 % B experiment, 50 % B grass butters, 50 % grass to execute the medicine, after 40 days, investigate the category and stub number of the miscellaneous grass, fresh and heavy, compute stub to defend an effect with fresh and heavy defend an effect to study herbicide of in addition to grass result. The result express, 28 % B hang the milk 2 625 ml/hm2 of the stubs defend an effect to reach to 93.3 %, fresh and heavy defend an effect to reach to 96.1 %, 28 % B hang the milk 2 325 ml/hm2, 0.06 L/hm2 of the stubs defend the effect as 92.2 %, fresh and heavy defend the effect as 94.5 %, but 50 % grass s can the wet sex powder 1 125 ml/hm2 of fresh and heavy defend the effect as 94.9 %, slightly high hang the milk 2 175 ml/hm2 in 28 % B s 2, but the stub defend the effect as 90.7 %, the result is general is 50 % B grass butters 2 250 ml/hm2. 28 % B s hang the milk 2 325～2 625 ml/hm2 with 50 % grass scan the wet sex powder 1 125 kg/hm2, use once before the seedling and can immediately control after sow whole grow to expect miscellaneous grass bane.