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《夏大豆田杂草消长规律及不同除草剂应用效果试验-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第28卷第6期2013年l2月VoI.28.No.6December,2013夏大豆田杂草消长规律及不同除草剂应用效果试验李茹赵桂东付佑胜(江苏徐淮地区淮阴农科所,淮阴市223001)摘要:对夏大豆田间杂草发生消长规律及当前市场上一些主流除草剂品种进行试验,以期提供科学除草技术参考,促进大豆生产高产稳产。试验表明:淮北地区夏大豆田禾本科杂草消长规律为在大豆播后3d开始出苗,播后9-12dT●进入出草高峰,25d后基本不再出草;阔叶杂草的出草规律与禾本科杂草相一致,但始出草期及出草高峰期均较禾草推迟3—5t{、夏大豆田杂草分属16科45种,优势种杂草为马唐、
2、千金子、狗尾草、牛筋草、马齿苋、铁苋菜、藜等为主要广m优势种杂草,总密度达198.5株/nl:;田间以未本科杂草为主,其次为阔叶杂草,莎草最少。除草方法为:播后苗前可用96%精一异丙甲草胺EC1050ml/h1112或48%异恶草松ECI125mJ/}lIn,药后25d对总草的株防效分别94.79%、90.86%,西鲜重防效分别为96.77%和95.59%。杂草3叶1心期前,可用12.5%氟吡甲禾灵EC750ml/hm或20%烯未定EC1000ml/hm防除禾本科杂草或用25%氟磺胺草醚SL1250ml/hm。,防除阔叶杂草。若田间单双子叶均有,可科学选药
3、农K合理混配。学关键词:杂草;消长规律;除草剂;使用技术中图分类号:$565文献标识码:A文章编号:1003—4374(2013)06—0005—04报砌ThelawofweedgrowthanddeclineinsummersoybeanfieldsandapplicationeffectofdifferentherbicidesLiRuetal(HuaiyinInstituteofAgricultureSciencesofXuhuaiDistrict,Jiangsu223001,China)Abstract:Totestthemainherbicide
4、santlthelawofweedgrowthanddeclineinsummersoybeanfields.whichwillprovidetechnicalreferencesforweedcontrolandpromotehigh—stable—yieldofsoy—bean.Theexperimentalresultsshowthatsummerweedsinsoybeanfieldwillgerminatein3daysaftersoybeansowing,after9-12days,thegrassgerminationwillreachape
5、ak;after25days,thegermina—tionwillnotoccuranymore;thegerminationlawofbroadleafweedsandgrassyisconsistent,butthegerminationperiodandgerminationpeakofbroadleafweedswillbe3—5dayslaterthanthelatter.Weedsinsoybeanfieldsbelongingto16families,45speciesandthedominantweedspeciesarecrabgras
6、s,daughterSOil,foxtail,goosegrass,purslane,ironamaranth,quinoaasthedominantspeciesofweedsetc.,withtiletotaldensityof198.5plant/m;fieldweedsaremainlygrassyweeds,followedbythebroad—leavedweeds,thenedgesweedsareleast.Weedscontrolmethods:Betweensoybeansowingandgermination.96%metolachl
7、orEC1O5Oml/hm0or48%ClomazoneECll25ml/hmwillbeapplied.25daysafterherbicidesapplication,thetotalplantcontroleffectare94.79%and90.86%respectively,weedfleshweightcontroleffectare96.77%and95.59%respectively.Before3leafstageofweeds.12.5%EC750ml/1inor20%EC10001nl/hmcanbeappliedtocontrolg
8、rassyweeds.or25%SL1250ml/hmf0rbro
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