冬小麦田杂草防除适期研究  

Suitable Control Period for Weeds in Winter Wheat

作　　者：吴翠霞[1] 刘伟堂[2] 张勇[1] 宋敏[1] 路兴涛[1] WU Cui-xia;LIU Wei-tang;ZHANG Yong;SONG Min;LU Xing-tao(Taian Academy of Agriculture Science,Taian 271000,China;Shandong Agriculture University,Taian 271000,China)

机构地区：[1]泰安市农业科学研究院,山东泰安271000 [2]山东农业大学,山东泰安271000

出　　处：《杂草学报》2017年第4期36-39,共4页Journal of Weed Science

基　　金：国家重点研发计划(编号:2017YFD0201706)

摘　　要：对夏玉米—冬小麦连作制度下的小麦田杂草发生动态进行监测,通过建立小麦苗后有、无草天数与小麦产量损失率之间的函数关系,探讨小麦田杂草与冬小麦的竞争临界期。结果表明,小麦田杂草发生以冬前为主,出苗量达87.62%;小麦产量损失率随着小麦苗后有草天数的增加而增大,随无草天数的增加而降低;以3%作为小麦产量损失的最大忍受限度,则小麦苗后22~87 d为杂草与小麦的竞争临界期。因此杂草防除应在11月上中旬进行,若冬前未进行除草,则应在翌年2月下旬至3月上旬小麦返青期及时进行化学防除。The weed dynamics in winter wheat fields under summer maize-winter wheat cropping system was monitored.Functional relationships between the weedy or weed-free days and the wheat yield loss rate were determined to ascertain the critical period of competition.Weeds in winter wheat occurred mostly before winter,with an emergence rate of 88%.Crop Yield loss rate increased with the increase of weedy days,and decreased with the increase of weed-free days.For a 3%as the maximum tolerance of wheat yield loss,the critical period of competition was about 22 to 87 days after wheat seedling sprouting.Therefore,weed control should be carried out from beginning to mid November.If weeds are not controlled before winter,chemical control should be carried out in late February to early March.

关 键 词：冬小麦 杂草 产量损失率 竞争临界期 防除适期 

分 类 号：S451[农业科学—植物保护]