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491%～961%,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918%～943%。
关键词:
麦秸覆盖,
除草剂,
玉米田,
杂草控制
Abstract: Effect of wheat st raw mulching on herbicide rate reduction in zero-til summer corn was studiedfrom 1997-2001value Wheat straw mulching before corn emergence played a very important role in w eed control incorn fieldvalue Weed density was reduced by 49value1%-96value1% in the wheat st raw mulching plots of 4 500-7 500kg/ ha comparing with the unmulched treatment svalue The dosage of post-apply ing herbicide,nicosulfuron andat razine with acetochlor,could be reduced by 25% in these mulched plotsvalue Wheat st raw also reduced corn y ieldif mulched with 7 500 kg/ havalue
Key words:
Wheat straw,
Herbicide reduction,
Corn,
Weed cont rol
中图分类号:
LI Xiang-ju, WANG Gui-qi, LI Bing-hua, Blackshaw R E. Ef fect of Wheat Straw Mulching on Herbicide Reduction in Zero-till Summer Corn[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.3321/j.issn:1000-7091.2003.z1.028.