摘要
在鄱阳湖平原区调查了直播二晚稻田杂草防除现状、稗草危害程度及其造成的水稻产量损失等。结果表明:直播二晚田间除草合计农药成本平均为58.0元/667 m^2;直播二晚田间稗草出现5级(严重)、4级(中等偏重)、3级(中等)、2级(中等偏轻)、1级(轻度)、0级(基本无草害)危害的田块面积分别占2.7%、18.3%、21.2%、23.2%、16.2%、18.4%;稗草1~5级危害田块的水稻产量损失率分别为6.9%、10.3%、14.2%、22.4%、49.6%。最后提出了直播二晚田间杂草的防控对策。
The present situation of weed control,as well as the harm degree of barnyard grass and the rice yield loss caused by this weed in double-cropping directly-sown late rice paddy in the Poyang Lake plain were investigated. The results showed that the average cost of applied herbicides for weed control was 58.0 yuan per 667 m^2. The acreage of double-cropping directly-sown late rice paddy in which the damage degree of barnyard grass was grade 5（serious）,grade 4（serious ～ medium）,grade 3（medium）,grade 2（light ～ medium）,grade 1（light） and grade 0（basically no weed damage） accounted for 2. 7%,18. 3%,21.2%,23.2%,16.2% and 18.4%,respectively. The rice yield loss rate caused by barnyard grass damage at grade 1 ～ 5 was6.9%,10.3%,14.2%,22.4% and 49.6%,respectively. Finally,the prevention and control countermeasures of weeds in double-cropping directly-sown late rice paddy in the Poyang Lake plain were proposed.
作者
徐荣
王修慧
程飞虎
王颖娴
陈忠平
黄大山
乐丽红
XU Rong;WANG Xiu-hui;CHENG Fei-hu;WANG Ying-xian;CHEN Zhong-ping;HUANG Da-shan;LE Li-hong(Nanchang City Grain and Oil Production Management Station of Jiangxi Province,Nanchang 330008,China;Henghu Farm of Jiangxi Province,Xinjian 330123,China;General Station of Agrotechnical Extension of Jiangxi Province,Nanchang 330046,China)
出处
《江西农业学报》
CAS
2018年第9期72-76,共5页
Acta Agriculturae Jiangxi
基金
2017年农业部种植业司农业技术试验示范与服务支持项目
关键词
直播
二季晚稻
杂草防除
稗草
危害损失
Direct seeding
Double-cropping late rice
Weed control
Barnyard grass
Damage loss
