摘要
在不同种植方式下,通过对玉米田杂草不同密度对玉米产量构成因素的影响,及防治中生态经济阈值模型的初步研究,建立了杂草密度和玉米产量损失率之间的函数关系。研究结果表明,清种玉米田中杂草治理的生态经济阈值为7.41～8.00株/m2,间种苜蓿田中杂草治理的生态经济阈值为8.43～9.47株/m2。当田间杂草密度低于其生态经济阈值时,不需要防除。
Under different planting methods,function equations between density of weeds in spring corn field and corn yield components and their eco-economic threshold model were established.The results showed that the eco-economic threshold of spring maize weeds in the corn field was 7.41~8.00 plants per square meter,and was 8.43~9.47 plants per square meter in intercropping of corn and alfalfa.When the weed density was lower than the eco-economic thresholds in fields,no weed controlling measures might be taken.
出处
《作物杂志》
CAS
CSCD
北大核心
2009年第6期49-52,共4页
Crops
基金
辽宁省教育厅高等学校创新团队科研项目(2009T088)
关键词
种植方式
玉米田杂草
生态经济阈值
Planting methods
Weed in corn field
Eco-economic threshold
