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时间:2017-12-08
《广东省杂草稻发生与分布情况调查》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、70广东农业科学2013年第23期广东省杂草稻发生与分布情况调查张栋梁,沈雪峰.陈勇(华南农业大学农学院杂草研究室.广东广州510642)摘要:为明确广东省杂草稻的发生与分布情况以及生物学特征,为广东省杂草稻的防治提供基本信息,通过采用目测法和样方法点面结合,调查广东省栽培稻田杂草稻的发生与危害情况,对调查的杂草稻生物学特征与其发生率、发生密度、综合危害指数综合进行分析,结果显示,广东省杂草稻的发生率为0.00%~33.11%,发生密度最低的县(市)约0,最高约18株/m,综合危害指数都在20%以上。以雷州、惠东、封开和恩平最为严重,杂草稻密度依次为18
2、.10、2.52、1.60、0.96株/m,综合危害指数依次为56.00%、45.00%、29.20%和15.80%。杂草稻植株较高、分蘖较强、叶色偏淡、成熟早、易落粒、种皮红色、籽粒偏籼型,得出广东省不同稻作区杂草稻发生与分布情况依次为粤西南稻作区>粤中南稻作区>粤中北稻作区>粤北稻作区,且杂草稻发生率为直播田>抛秧田>移栽田。关键词:广东省;杂草稻;发生;分布;调查中图分类号:$545文献标识码:A文章编号:1004—874(2013)23—0070—04一--一一一●●一一lnvestiRationontheoccurrenceanddistrib
3、utionn1●●~l●olweeayriceinGuangaongprovinceZHANGDong-liang,SHENXue-feng,CHENYong(WeedScienceLaboratory,CollegeofAgriculture,SouthChinaAgriculturalUniversity,Guangzhou510642,China)Abstract:Theobjectiveofthisstudyistodefinetheoccurrence,distributionbiologicalcharacteristicsofweedyri
4、ceinGuangdongprovince,andtoprovidebasicinformationonthepreventionofweedyriceinGuangdongProvince.TheoccurrenceandhazardsituationofweedyricewithcultivatedriceinGuangdongprovincewasinvestigatedthroughvisualscoringofthelevelofweedinfestationonaseven-classscale.Thebiologicalcharacteri
5、stics,incidence,densityandharmfulnessofweedyriceinricefieldswasanalysis.Theproportionofweedyriceoccurrencerangedfrom0.00%to33.11%inGuangdongprovince.TheweedyriceseriouslyinfestedthepaddyfieldinLeizhou.Huidong.FengkaiandEnpingby18.10,2.52,1.60,0.96plant/m。,separately,andthevalueof
6、weedyricewas56%,45.00%,29.20%,15.80%.Theweedyricewastallerthancultivatedrice,theweedyriceproducedmoretillersthancultivatedriceatseedlingstage,theleafcolorwaslighting,theweedyricewasearliermaturedcomparedwithcultivatedrice,theweedyriceseedshatteringwaseasierthancultivatedrice,thet
7、estaofweedyricewasred,theweedyricewasmorelikeIndicaRice.ThedistributionfortheoccurrenceofweedyriceinGuangdongprovincewassouthwesternriceplantingarea>mid-southernriceplantingarea>mid—northernriceplantingarea>northernriceplantingarea.andtheincidenceofweedyriceisdirectricefield>thro
8、wingfield>transplantingfield.Keywords:Gu
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