在大豆上应用除草剂的残留效应和间隔
Milena Baretta Franceschetti1, Elias Silva de Medeiros1, Guilherme Pereira da Silva1
1Federal University of Grande Dourados, Dourados, Mato Grosso do Sul, Brazil.
概括
大豆植物毒性因除草剂的类型和种植前应用时间而异. 迪坎巴造成的损害最多,而fluroxypyr + clethodim是最安全的,在迪坎巴和imazapic + imazapyr中观察到产量减少.
科学领域:
- 农业科学 农业科学
- 农业学是一种农业学.
- 杂草科学 杂草科学
背景情况:
- 非选择性除草剂经常用于燃烧 *Conyza* spp. 在大豆种植之前.
- 坚持除草剂应用和大豆播种之间的植后间隔对于防止作物损伤至关重要.
研究的目的:
- 评估在播种前不同时间间隔应用在大豆上常见的出现后除草剂的植物毒性.
- 确定具有可接受作物安全性的除草剂,并确定 *Conyza* spp. 的最佳回植期. 控制,控制,控制,控制,控制,控制.
主要方法:
- 实地实验使用一个6x4+2的因数设计与四个复制品.
- 六种除草剂 (halauxifen + diclosulam,triclopyr,fluroxypyr + clethodim,atrazine + mesotrione,dicamba,imazapic + imazapyr) 在大豆播种 (DBS) 之前的0,15,30和45天使用.
- 在不同应用时间评估大豆植物毒性和产量.
主要成果:
- 迪坎巴对大豆产生了显著的植物毒性,在0 DBS时的70%到45 DBS时的6%不等.
- 阿特拉辛+梅索和伊马扎皮克+伊马扎皮尔在0 DBS时也表现出植物毒性 (分别为40%和10%).
- 迪坎巴和伊马扎皮克 + 伊马扎皮尔显著降低了大豆产量; 弗洛洛西皮尔 + 克莱索迪姆表现出较低的植物毒性.
结论:
- 选择除草剂和应用时间显著影响大豆的安全性和产量.
- 迪坎巴对大豆造成伤害的风险最高,无论种植后的时间间隔如何.
- 弗洛洛西皮尔 + 克莱索迪姆是评估的最安全的除草剂选择,即使在播种前立即应用时,也显示出最小的植物毒性.
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