稻茬免耕直播油菜田牛繁缕发生及对产量的影响  

EFFECT OF Malachium aquaticum ON THE YIELD OF NO-TILLAGE DIRECT SEEDING RAPE FOLLOWED RICE

作　　者：管丽琴[1] 陈建生[1] 张菊元 徐秋娣 陆善庆[1] 何翠娟[2] 李秀玲[2] 

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]上海市农业技术推广服务中心,上海201103

出　　处：《上海农业学报》2003年第2期67-69,共3页Acta Agriculturae Shanghai

基　　金：上海市嘉定区科技攻关项目"农田一次性化除技术研究与推广应用"的一部分

摘　　要：通过优势种阔叶杂草牛繁缕 [Malachiumaquaticum(L .)Fries]对油菜籽产量损失的测定 ,建立了产量损失预测模型 :Y =91.3 0 3 2 - 0 .2 73 0X ;确定了不同除草措施下产量损失经济阈值 ,提出了相应的防除指标 ,即直播油菜田牛繁缕达到 40 ,2 8,3 4株 /m2 时 ,需分别用 3 0 %好实多 (benazolin ethyl)SC、2 1.2 %仙耙(ethametsulfuron +benazolin ethyl+ quizalofop ethyl)SC、17.5 %油菜双克 (ethametsulfuron +benazolin ethyl)Through the determination of the rapeseed yield loss caused by dominant species broad-leaf weed Malachium aquaticum, a forecast model of the rapeseed yield loss was established, i.e. Y=91.3032-0.2730X;the economic thresholds of the yield loss under different weeding measures were fixed and the corresponding control indexes were also put forward, i.e.when the density of Malachium aquaticum in direct seeding rape field was 40, 28 and 34 plants/m 2, the weed should be carried out with benazolin-ethyl, ethamesulfuron+benazolin-ethyl+quizalofop-ethyl and ethamesulfuron+benazolin-ethyl respectively.

关 键 词：稻茬 免耕直播 油菜田 牛繁缕 发生特点 产量 杂草防除 

分 类 号：S451.224[农业科学—植物保护]