【作者】 李香菊； 王贵启； 吕德滋；

【Author】 Li Xiangju;Wang Guiqi;Lu Dezi;R.E.Blachshaw;Institute of Food and Oil Crops,Hebei Academy of Agricultural and Forestry Sciences;Research Center,Agriculture and Agri-Food Canada;

【机构】 河北省农林科学院粮油作物研究所；

【摘要】 田间试验结果表明:小麦种植密度与杂草发生量关系密切。等行距种植时,小麦播种量由2.5kg/亩提高到12.5kg/亩,越年生、早春性及晚春性杂草发生数量分别降低0、70.3%和83.6%,越年生及早春性杂草鲜重降低81.1%;小麦三密一稀种植时杂草发生量稍多于相同密度下等行距种植的杂草发生量。小麦-玉米两熟农田,增加小麦播量至12.5kg/以上,后茬免耕种植玉米时可不用喷施灭生性除草剂农达,仅用40%乙阿合剂FL150ml/亩就能达理想除草效果,这在一定程度上节省了除草剂用量。更多还原

【Abstract】 Field experiment was conducted in 1997- 1998 on wheat seeding rate and row spacing in weed control.Density of bianual(flixweed and shepherdspure) early spring emerged(lambsquaters) and late spring emerged weeds(crabgrass,goose grass,redroot pigweed etc) decreased by 0,70.3%and83.6%respectively while fresh weight of bianual and early spring emerged weeds decreased by 81.1%as wheat seeding rate increased from 2.5 kg/mu to 12.5 kg/mu.More weeds emerged when wheat was planted in two narrow rows(row spacing 15cm) and one wide row(row spacing 30cm) than it planted in20 cm row spacing.Excellent weed control efficacy was achieved only by applying 150ml/mu 40%atrazine plus acetochlar in no tillage corn plots planted after 12.5 kg/mu wheat needing rate plots,while150ml/mu 40%atrazine plus acetochlar tank mixing 150ml/mu 41%roundup should be applied in no tillage corn plots planted after 2.5kg/mu wheat seeding rate plots.更多还原