农田管理措施对红壤稻田系统杂草种群结构的影响  

Influence of Different Agricultural Practices on Weed Community Composition of Late Rice in Redlish Rice-cropping Ecosystems

作　　者：李照全[1] 尹力初[1] 周卫军[1] 张杨珠[1] 谢建明[1] 

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128

出　　处：《农业现代化研究》2008年第2期239-241,245,共4页Research of Agricultural Modernization

基　　金：湖南农业大学人才引进基金项目06YJ08

摘　　要：以长期定位试验为依托,研究了红壤稻田系统不同轮作制度、施肥条件、地下水位状况对晚稻田间杂草种群的影响。结果表明:在不同轮作制度下,稻稻冬绿肥的稻田系统中杂草密度最大,为409.8株/m2;在不同施肥处理中,以单施化肥处理的稻田系统中杂草密度最大,为513.7株/m2;在不同水分管理条件下,低水位更有利于杂草的生长,杂草密度达到376.6株/m2。不同农田管理措施下杂草种群组成存在差异,以施肥措施对杂草种群组成影响最大。Based on a long-term experiment, the influence of different agricultural practices on the weed community composition of late rice was studied in redlish rice-cropping ecosystems. The results showed that the weed density was highest under rice-rice-green manure cropping system among three cropping systems, and it was 409.8 plant/m^2, there were more weed plants under only chemic fertilizer applied than other two fertilization systems, the weed density was 513.7 plant/m^2. The more weeds were found under the lower groundwater table than under the higher groundwater table, and the weed density was up to 376.6 plant/m^2. There had the different weed community under different agricultural practices, and fertilization was the most important factor caused the weed community changed.

关 键 词：轮作制度 施肥 地下水位 杂草 杂草种群 稻田生态系统 

分 类 号：S365[农业科学—作物栽培与耕作技术] S545[农业科学—农艺学]