广东省杂草稻发生与分布情况调查  

Investigation on the occurrence and distribution of weedy rice in Guangdong province

作　　者：张栋梁[1] 沈雪峰[1] 陈勇[1] 

机构地区：[1]华南农业大学农学院杂草研究室,广东广州510642

出　　处：《广东农业科学》2013年第23期70-73,共4页Guangdong Agricultural Sciences

基　　金：国家科技部转基因生物新品种培育重大专项(2009ZX08012-020B);广东省农业科技推广专项(2012)

摘　　要：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^2，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18．10、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。The objective of this study is to define the occurrence, distribution biological characteristics of weedy rice in Guangdong province, and to provide basic information on the prevention of weedy rice in Guangdong Province.The occurrence and hazard situation of weedy rice with cultivated rice in Guangdong province was investigated through visual scoring of the level of weed infestation on a seven-class scale. The biological characteristics, incidence, density and harmfulness of weedy rice in rice fields was analysis. The proportion of weedy rice occurrence ranged from 0.00% to 33.11% in Guangdong province. The weedy rice seriously infested the paddy field in Leizhou, Huidong, Fengkai and Enping by 18.10, 2.52, 1.60, 0.96 plant/m2, separately, and the value of weedy rice was 56%, 45.00%, 29.20%, 15.80%. The weedy rice was taller than cultivated rice, the weedy rice produced more tillers than cultivated rice at seedling stage, the leaf color was lighting, the weedy rice was earlier matured compared with cultivated rice, the weedy rice seed shattering was easier than cultivated rice, the testa of weedy rice was red, the weedy rice was more like Indica Rice. The distribution for the occurrence of weedy rice in Guangdong province was southwestern rice planting area〉 mid-southern rice planting area〉 mid-northern rice planting area〉 northern rice planting area, and the incidence of weedy rice is direct rice field 〉 throwing field〉 transplanting field.

关 键 词：广东省 杂草稻 发生 分布 调查 

分 类 号：S545[农业科学—作物学]