水直播稻田稗、水莎草的危害损失与复合防除指标  

STUDY ON INFESTATION,DAMAGE AND COMPLEX CONTROL TARGETS OF Echinoch loa crusgalli AND Juncellus serotinus IN WET-LAND DIRECT-SOWING RICE FIELDS

作　　者：管丽琴[1] 陈建生[1] 陈根兴[1] 程梅初 沈其龙[1] 张颂函 

机构地区：[1]上海市嘉定区农业技术推广服务中心,上海201800 [2]上海市农药检定所,上海201103

出　　处：《上海农业学报》2001年第2期79-81,共3页Acta Agriculturae Shanghai

摘　　要：在稗、水莎草自然混生条件下对水直播稻产量损失测定的基础上 ,建立了水稻产量损失预测模型 :Y =36 8.836 2 - 8.4 888X1- 0 .352 4X2 ,并进一步推导出 5种不同除草措施的经济阈值 ,提出相应的复合防除指标 ,即水直播稻田杂草密度分别达到稗 1株 /m2 和水莎草 30株 /m2时 ,需用“二氯喹啉酸 +吡嘧磺隆”等除草措施进行防除。Based on the determination of yield loss of wet land direct sowing rice in natural mixed occurring conditions of E.crusgalli and J.serotinus ,the prediction model of rice yield loss( Y =368.8362-8.4888 X 1 -0.3524 X 2 ) was established and the economic thresholds under 5 kinds of weeding measures were further derived. Meanwhile, the corresponding complex weed control targets were advanced, i.e. weeds should be controlled by application of 50%Quinclorac + 10%Pyrazosulfuron ethyl or other weeding measures when weed densities in direct sowing rice fields reached 1 plant/m 2( E.crusgalli ) and 30 plants/m 2( J.serotinus ),respectively.

关 键 词：水直播稻田稗 水莎草 产量损失预测 复合防除指标 稗草 危害 

分 类 号：S451.21[农业科学—植物保护]