不同除草剂用量的田间防效及对玉米安全性影响

Field control efficacy of different herbicide dosages and their effects on maize safety

为筛选玉米田高效安全的除草剂使用剂量及助剂增效效应,提高玉米生产效率。在黑龙江省佳木斯市选取乙草胺(81.5%乳油)、莠去津(38%悬浮剂)及2种除草剂助剂,每种除草剂组合设低、高2个浓度,每种助剂设低、中、高3种浓度,开展了田间土壤喷施对玉米田间杂草的防效及对玉米安全性和产量的影响试验。结果表明,苗前除草对所有田间杂草均具有防除效果,降低除草剂用量田间杂草防除率也降低,通过添加助剂能够提高杂草防除率。总的来看,有效成分1 472 g·hm^(-2)乙草胺+11 482 g·hm^(-2)莠去津+225 mL·hm^(-2)助剂2号的防除效果最优。

In order to screen the efficient and safe herbicide dosage and synergistic effect of additives in maize field,and improve maize production efficiency,the effect of field soil spraying on weed control in maize fields and its impact on safety and yield of maize was investigated,in Jiamusi City,acetochlor(81.5% emulsifiable concentrate),atrazine(38% suspension) and two herbicide additives were selected,and each herbicide combination was set with two concentrations of low and high,and each additive was set with three concentrations of low,medium and high.The results showed that pre-emergence weeding had a control effect on all field weeds,and the weed control rate in the field was also reduced with the reduction of herbicide dosage,and the weed control rate could be increased by adding additives.In general,1 472 g·hm~(-2) acetochlor +11 482 g·hm~(-2) atrazine +225 mL·hm~(-2) additives 2 had the best control effect.