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1986~1994年的调查结果,湖北省主要棉产区的棉田杂草共有64种,隶属25科。优势种群以马唐、牛筋草和香附子等为主。壤土地杂草发生量大,而沙土地杂草发生量小;窄行密植杂草密度明显小于宽行稀植田;地膜棉中、后期杂草密度明显降低。水旱轮作能明显降低一年生杂草的基数,改变棉田杂草群落结构,并推迟杂草萌发的高峰期。选用15种除草剂的除草试验结果,每公顷用80%棉草完可湿性粉剂1500g、48%拉索乳油3000ml或72%都尔乳油1500ml进行土壤处理,或者施用125%拿捕净900ml、125%盖草能600ml、35%稳杀得600ml进行茎叶处理,能有效地防除狗尾草;使用地乐胺1500~4500ml、都尔750~2250ml、氟乐灵1500~2250ml进行土壤处理,施药后45d,对马唐的防效可达90%以上;施用41%草甘磷930~1830ml防除香附子效果良好。精细整地可以明显提高化学除草的效果
As a result of the survey from 1986 to 1994, there were 64 kinds of cotton weeds in the main cotton producing areas of Hubei Province, belonging to 25 families. The dominant species were crabgrass, goosegrass and incense monkshood. The occurrence of weeds in loam soil was large, while that of weeds in sandy land was small. The density of weeds in narrow row was significantly less than that in broad row and thin fields. The density of weeds in middle and late stage of cotton mulching decreased obviously. Drought and drought rotations could significantly reduce the annual number of annual weeds, change the weed community structure and delay the peak of weed germination. Herbicidal test results using 15 kinds of herbicides, per hectare with 80% cotton finished wettable powder 1500g, 48% cordyceps 3000ml or 72% Bole EC 1500ml soil treatment, or the application of 12 5% net catch 900ml, 12.5% cauliflower can 600ml, 35% stable kill 600ml for stems and leaves treatment, can effectively control Setaria; the use of music amine 1500 ~ 4500ml, areal 750 ~ 2250ml, trifluralin 1500 ~ 2250ml for soil treatment, 45d after application, the control effect of crabgrass up to 90%; the application of 41% glyphosate 930 ~ 1830ml control good effect of monkshood. Finely ground can significantly improve the effect of chemical weeding