摘要
为降低除草剂使用量,提高东北春大豆杂草防除效果,在常用土壤封闭处理剂和茎叶处理剂减量25%的基础上,分别添加3种喷雾助剂(有机硅类助剂施倍丰、表面活性剂类助剂激健、植物油类助剂速捷),比较杂草防除效果和大豆生物学性状、产量、收益等指标,探明3种助剂对除草剂减量的作用影响。结果表明:3种喷雾助剂对杂草总防效优异,鲜重防效、株防效均高达90%,添加3种喷雾助剂的减药处理与常规不减药处理比较没有显著差异。施倍丰对禾本科杂草、阔叶杂草的防效最好,对2类杂草的最高鲜重防效和最高株防效均达到90%以上;速捷对禾本科杂草的鲜重防效最高,达94.2%,但株防效最低,为86.7%,对阔叶类杂草的鲜重防效和株防效约为86%;激健对禾本科杂草防效与施倍丰相当,株防效和鲜重防效约为90%,激健对阔叶类杂草的鲜重防效和株防效比速捷略低,防效约85%。3种喷雾助剂对大豆株高、荚数、百粒重等生物学性状及产量、收益与常规不减药处理比较没有显著差异。激健对产量的影响最大,能增产4.47%,增效3.43%,其次是施倍丰,增产1.6%,增效2.12%,速捷没有增产增效作用。结果表明除草剂使用中添加喷雾助剂能达到减量增效的作用,本研究结果可以为推广除草剂减施技术提供方法参考。
In order to reduce the use of herbicide and improve weeds control effect of spring soybean in northeast China, on the basis of 25% reduction of commonly used soil treatment agent and stalk leaf treatment agent, 3 kinds of spray adjuvants(organosilicon adjuvant Shibeifeng, surfactants adjuvant Jijian, and plant oil adjuvants Sujie) were added respectively, the effect of three adjuvants on herbicide reduction was studied.The results showed that 3 kinds of spray adjuvants had excellent control effect on weeds, the control effect of fresh weight and plant was as high as 90%, there were no significant difference between 3 kinds of spray adjuvants and check. Shibeifeng had the best control effect on Gramineae weeds and broad-leaved weeds,and the highest fresh weight and plant control effects were above 90% for both types of weeds. The control effect of Sujie on fresh weight of gramineous weeds was the highest(94.2%), but the plant control effect was the lowest(86.7%), the control effect of Sujie on fresh weight and plant control of broad-leaved weeds was about 86%. The control effect of Jijian on gramineous weeds was similar to Shibeifeng, the control effect of Jijian on fresh weight and plant weight was about 90%, the control effect of Jijian on broad-leaved weeds was slightly lower than that of Shibeifeng, and the control effect was about 85%.There was no significant difference in the biological characters, yield and yield of soybean with plant height, pod number and 100-seed weight by 3 spray adjuvants Jijian had the greatest impact on the yield, increasing yield by 4.47% and efficiency by 3.43%, followed by Shibeifeng, increasing yield by 1.6% and efficiency by 2.12%,Sujie did not increase yield and efficiency.The addition of spray adjuvants in application of herbicides has the effect of reduction and synergism,the experiment provides a reference for popularizing the technology of reducing herbicides.
引文
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