棉花学报2012，Vol.24Issue(3)：272-278,7.
外来入侵杂草黄顶菊与棉花的竞争作用
Competition of an Alien Invasive Weed Flaveria bidentis with Cotton
摘要
Abstract
The effects of an alien invasive weed Flaveria bidentis with different densities or symbiotic periods on the growth of cotton were studied in cotton field. The results indicated that the cotton budding stage was postponed with increasing weed density up to 0.5 plants·m-1 of row; Meanwhile, stem diameter, sympodial branch number, and square and boll number were reduced. However, plant height, number of plants per 4 m of row and fiber quality could not be affected obviously. If the symbiotic period for cotton and F. bidentis over four weeks, cotton stem diameter decreased obviously. When the symbiotic period was over eight weeks, the cotton yield was decreased sharply. In conclusion, Flaveria bidentis are strong invasive and competitive to cotton, and should be controlled before its density to 0.5 plants per meter of row and the symbiotic period to eight weeks. And primarily determined the economic threshold was 0.25 plants·m-1 of row.关键词
黄顶菊/棉花/竞争作用/经济阈值Key words
Flaveria bidentis/ cotton/ competition/ economic threshold分类
农业科技引用本文复制引用
彭军,马艳,李香菊,马小艳,奚建平,马亚杰,李希风..外来入侵杂草黄顶菊与棉花的竞争作用[J].棉花学报,2012,24(3):272-278,7.基金项目
国家棉花产业技术体系岗位科学家经费资助(nycytx-06) （nycytx-06）
