假稻生物学特性及其对除草剂的敏感性测定  

Biological characters of Leersia japonica and its sensitivities to herbicides

作　　者：陆保理 沈国辉[2] 王玉香[1] 张建新[1] 钱振官[2] 管丽琴[1] 李涛[2] 程秋华[1] 顾月兰[1] 

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]上海市农业科学院植物保护研究所,上海201106

出　　处：《上海农业学报》2009年第1期109-113,共5页Acta Agriculturae Shanghai

基　　金：上海市嘉定区科学技术发展基金项目[(2006)JKK003]资助

摘　　要：详细描述和鉴别了上海市嘉定区直播稻田假稻生物学特性,测定了假稻对直播水稻的产量影响,并选用6种对禾本科杂草有较好防效的稻田除草剂进行假稻的敏感性测定。结果表明,假稻在上海市嘉定区能够全年发生,其中3月底至5月、7月底至10月分别为麦茬田、稻茬田生长盛期,种群发展蔓延迅速;直播水稻产量(y)与假稻密度(x)呈极显著的负相关,回归方程为y=476.5026-0.5366x(r=0.9535);上海市嘉定区的假稻种群对所有供试除草剂均具有极强的耐药性。The biological characters of L. japonica in the direct-seed rice field of Jiading District were described in detail,the influence of L. japonica on rice yield was determined,and its sensitivity to 6 herbicedes having a good control effect on weeds was also tested. The results showed that L. japonica could grow round the year in Jiading District,and its flourishing period was from end-March to May in wheat fields and from end-July to October in paddy fields. There was very significant negative correlation between the direce-seed rice yield （y）and the density （x）of L. japonica ,and their regression equation was y = 476. 5026 - 0. 5366x （r = 0. 9535）. The population of L. japonica in Jiading District had a very high resistance to all the tested herbicides.

关 键 词：假稻 生物学特性 产量损失 防除效果 

分 类 号：S451[农业科学—植物保护]