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首页> 外文期刊>Sociedade Brasileira da Ciencia das Plantas Daninhas >Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize
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Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize

机译：草甘膦除草剂与耐除草剂玉米间作在Urochloa brizantha处理中的应用

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The success of the intercropping among cultivated species depends on the adoption of practices that provide, in due course, greater competitive ability of a species over another. The objective of this study was to evaluate the use of glyphosate herbicide in the suppression of Brachiaria (signalgrass) intercropped with maize. The experiment was conducted in a randomized complete block design with four replications. The treatments were arranged in a 5 x 2 + 2 factorial arrangement, the first factor corresponding to the doses of glyphosate (48, 96, 144, 240, 480 g ha-1 of the acid equivalent (a.e)) and the second one to the vegetative stages of the signalgrass at the time of application (2 and 4 tillers). Two controls were added to the treatment list, comprising controls without herbicide application and hand removal of the signalgrass. The number of plants, tillers and dry matter of signalgrass was reduced with glyphosate. The increase of the glyphosate doses enhanced the injure to the forage plants, mainly when the compound was sprayed at the two-tiller vegetative stage. The dry matter of maize plants increased proportionally to the glyphosate dose. However, the height of the maize plants was not affected. The grain mass and productivity of maize grain increased with increasing dose of glyphosate. The maize yield was negatively influenced on the untreated control. Glyphosate at 96 and 144 g ha-1, when applied at 2 and 4 tiller stage, respectively, reduces the growth of signalgrass and does not affect the maize grain yield.
机译：栽培物种间作成功与否取决于在适当时候提供一种物种比另一种具有更大竞争能力的做法。这项研究的目的是评估草甘膦除草剂在玉米间作的臂Bra病（信号草）的抑制中的应用。实验是在随机完整区组设计中进行的，重复四次。处理方式按5 x 2 + 2阶乘排列，第一个因子对应于草甘膦的剂量（酸当量（ae）为48、96、144、240、480 g ha-1），第二个对应于施用时信号草的营养阶段（2和4分till）。将两个对照添加到治疗清单中，包括不使用除草剂和手动去除信号草的对照。草甘膦减少了信号草的植物，分till和干物质的数量。草甘膦剂量的增加增加了对草料植物的伤害，主要是在二分iller营养期喷洒该化合物时。玉米植物的干物质与草甘膦剂量成比例增加。但是，玉米植株的高度没有受到影响。随着草甘膦剂量的增加，玉米的籽粒质量和生产力增加。玉米产量对未处理的对照有负面影响。当分别在2和4分till期施用时，分别在96和144 g ha-1处的草甘膦会降低信号草的生长，并且不影响玉米的籽粒产量。

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