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Economics of herbicide programs for weed control in conventional, glufosinate, and dicamba/glyphosate‐resistant soybean across Nebraska
Agronomy Journal ( IF 2.1 ) Pub Date : 2020-08-25 , DOI: 10.1002/agj2.20427
Adam Striegel 1 , Kent M. Eskridge 2 , Nevin C. Lawrence 3 , Stevan Z. Knezevic 1 , Greg R. Kruger 1 , Christopher A. Proctor 1 , Gary L. Hein 4 , Amit J. Jhala 1
Affiliation  

Despite widespread adoption of dicamba/glyphosate‐resistant (DGR) soybean [Glycine max (L.) Merr.] in Nebraska and across the United States in recent years, economic information comparing herbicide programs with glufosinate‐resistant (GLU‐R) and conventional soybean is not available. The objectives of this study were to evaluate weed control efficacy, crop safety, gross profit margin, and benefit/cost ratios of herbicide programs with multiple sites of action in DGR, GLU‐R, and conventional soybean. Field experiments were conducted in 2018 and 2019 at three irrigated and two rain‐fed locations across Nebraska, for a total of 10 site‐years. Herbicides applied pre‐emergence (PRE) that included herbicides with three sites of action provided 85–99% control of common lambsquarters (Chenopodium album L.), Palmer amaranth (Amaranthus palmeri S. Watson), velvetleaf (Abutilon theophrasti Medik.), and a mixture of foxtail (Seteria spp.) and Poaceae species. Pre‐emergence herbicides evaluated in this study provided 72–96% weed biomass reduction and 61‒79% weed density reductions compared with the nontreated control. Herbicides applied post‐emergence (POST; dicamba plus glyphosate, glyphosate, glufosinate, and acetochlor plus clethodim plus lactofen) provided 93–99% control of all weed species 28 d after POST (DAPOST). Herbicides applied POST provided 89–98% weed biomass reduction and 86–96% density reduction at 28 DAPOST. For individual site‐years, yield was often similar for PRE followed by POST herbicide programs in herbicide‐resistant (HR) and conventional soybean. Gross profit margins and benefit/cost ratios were higher in HR soybean than in conventional soybean, although price premiums for conventional soybean can help compensate for increased herbicide costs.

中文翻译:

内布拉斯加州范围内常规,草铵膦和抗麦草畏/草甘膦的大豆除草剂项目的经济控制

尽管 近年来在内布拉斯加州和美国各地广泛使用抗麦草畏/草甘膦(DGR)的大豆[ Glycine max(L.)Merr。],但将除草剂方案与抗草铵膦(GLU-R)和常规除草剂方案进行比较的经济信息大豆不可用。这项研究的目的是评估在DGR,GLU-R和常规大豆中具有多个作用位点的除草剂计划的除草效果,作物安全性,毛利润率和收益/成本比。分别在2018年和2019年在内布拉斯加州的三个灌溉地点和两个雨水灌溉地点进行了实地试验,总共进行了10个工作年。除草剂使用了出苗前(PRE),其中包括具有三个作用位点的除草剂,可控制普通小羊8585-99%(藜科相册)L。),Palmer amaranth(Amaranthus palmeri S.Watson),velvetleafAbutilon theophrasti Medik。)以及狐尾(Seteria spp。)和禾本科的混合物种类。与未经处理的对照相比,本研究中评估的出苗前除草剂可减少72–96%的杂草生物量,减少61%至79%的杂草密度。出苗后(除草剂)施用除草剂(POST;麦草畏加草甘膦,草甘膦,草铵膦,乙草胺加草甘菊酯加乳粉)对所有杂草物种进行了POST(DAPOST)后28 d的控制,占93-99%。POST施用的除草剂在28 DAPOST时可减少89-98%的杂草生物量和86-96%的密度。对于单个站点年,在抗除草剂(HR)和常规大豆中,PRE和POST的除草剂计划的产量通常相似。尽管传统大豆的价格溢价可以帮助弥补除草剂成本的上涨,但热轧大豆的毛利率和收益/成本比要高于传统大豆。
更新日期:2020-08-25
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