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.
出处
《农业现代化研究》
CSCD
北大核心
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
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
cropping system
fertilization
groundwater table
weed
weed community
rice-cropping ecosystem
