摘要
对千金子［Ｌｅｐｔｏｃｈｌｏａｃｈｉｎｅｎｓｉｓ（Ｌ．）Ｎｅｓｓ］在直播水稻田的发生规律和对水直播稻产量损失率的影响以及生态经济除草阈值问题进行了初步研究，建立了千金子生态除草阈值模型，计算出在不同除草措施下，防除千金子应达到的密度水平．
This paper discribes the occurring regularity of Lerptochloa chinensis and its effect on the loss rate of yield of direct-sowillg rice, and the research of eco-economic weeding threshold. The eco-economic weeding threshold model is established. The densities marking the necessity of controllillg weed are estimated under different weeding measures.
出处
《上海农业学报》
CSCD
1996年第3期57-59,共3页
Acta Agriculturae Shanghai
关键词
水稻
直播
千金子
杂草
产量损失率
经济阈值
Direct-sowing rice
Leptochloa chinensis
Occurring regularity
Loss rate of yield
Eco-economic weeding threshold
