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玉米是我省的主要粮食作物之一。多在5～10月的雨季种植,杂草危害重。如果出苗和生长后期阴雨连绵,眙误人工中耕,杂草危害损失更大。近年推广杂交玉米,采取定向直播和袋苗移栽丰产栽培技术,玉米产量大幅度增长,不少田块亩产单季超吨粮。经济效益显著,化学除草也成了农户的迫切要求。本试验用乙草胺作芽前除草,用草甘膦加防护罩定向喷雾防除后期杂草,探索以化除代替人工中耕除草的可能性。一、材料与方法芽前除草选用江苏省昆山化工厂产50％乙草胺乳油,中后期除草选用南宁化工实验厂产
Corn is one of the main food crops in our province. More in the May-October rainy season planting, weeds harms. If the emergence and growth of late rainy season, mistakenly artificial cultivation, weeds greater harm. In recent years, the promotion of hybrid maize, direct sowing and bags of seedlings transplanting high yielding cultivation techniques, substantial increase in corn production, many plots yield single-season super-tonnage. Significant economic benefits, chemical weeding has become an urgent requirement of farmers. This experiment with acetochlor for pre-emergence weeding, glyphosate and protective guards directional spray to control late weeds, to explore in addition to replace the possibility of artificial cultivation weed. First, materials and methods Pre-emergence weeding selection of chemical plant in Kunshan, Jiangsu Province, 50% acetochlor EC, weeding in the late selection of Nanning Chemical Laboratory Plant