【摘要】 1997～2001年,采用大田试验与室内生物测定相结合的方法,就麦秸覆盖与苗后除草剂减量施用相配合对免耕玉米田杂草的控制作用及机理进行了研究。结果表明:玉米播种后田间采用麦秸覆盖可在一定程度上控制杂草的发生。当麦秸覆盖量为4500～7500kg/hm2时,玉米田杂草密度比不覆盖的处理降低49 1%～96 1%,在这样的小区除草剂采用定向喷雾,即使苗后茎叶处理除草剂玉农乐和阿特拉津的用量比常规用药量减少1/4时,小区内除草效果仍可以达到91 8%～94 3%。更多还原

【Abstract】 Effect of wheat straw mulching on herbicide rate reduction in zero-til summer corn was studied from 1997-2001. Wheat straw mulching before corn emergence played a very important role in weed control in corn field. Weed density was reduced by 49.1%-96.1% in the wheat straw mulching plots of 4 500-7 500 (kg/ha comparing) with the unmulched treatments. The dosage of post-applying herbicide, nicosulfuron and (atrazine) with acetochlor, could be reduced by 25% in these mulched plots. Wheat straw also reduced corn yield if mulched with 7 500 kg/ha.更多还原