Studies on the Weed Developing Regularity and Controlling Technique for Agri-Grazing-Ecotone under Conservation Tillage in Wheat Field

摘要

There were 30 species weed in wheat field from agri- grazing-ecotone for conservation tillage, their developing density and frequency were higher in conservation tillage than traditional tillage method about 31.8～42.6% and 13.3～31.6%. Accordingly, their expanding condition was serious increasingly. Weed damage and its control in the wheat field with conservation tillage planting method was investigated and experimented. Some measure were made mainly of Chemical herbicide、 mechanical method、 artificial control and the rotate farm. The result showed that the weed control amount in the soybean field was larger in the early growth stage than that had good results for chemical herbicide in the seedling stage with 2,4-D butyl ester (2,4-D 丁酯)、2-methyl-4- chlorophenoxy acetic acid(二甲四氯)、护麦、骠马(C18H 16CINO3),抑阔宁+骠马、护麦(C7H3Br2NO)+阔 莠克、2,4-D butyl ester(2,4-D丁酯)+骠马(,C18H16 CINO3)and after harvest make use of草甘膦In autumn. In addition, weed control of mechanical method had a good effect on fleet-furrow + cultivation. The compositive measure had a better outcome with fleet- furrow +chemical herbicide.