[{"data":1,"prerenderedAt":27},["ShallowReactive",2],{"news-f8f9e0831d97445782ef0ea6d850264c":3},{"author":4,"classification":5,"collectionnum":6,"content":7,"createTime":8,"effectivetime":9,"extra":5,"grantor":10,"granttime":11,"homepageimages":5,"id":12,"images":13,"images1":5,"images2":5,"isimmediate":14,"ispush":15,"isread":15,"link":5,"note":5,"orgId":5,"pushtime":16,"pushtype":17,"readnum":18,"sharenum":6,"showorder":19,"showwebsite":17,"source":20,"sourcelink":5,"status":21,"summary":22,"system":5,"thumbnail":23,"thumbnail1":5,"thumbnail2":5,"timer":9,"title":24,"types":25,"updateTime":26},"440cc6a034a6468bb0b69e3928ae4b1b","",0,"\u003Cp style=\"text-indent: 2em;\">月以来，长江流域总体气温偏高，油菜生育进程加快，开花期较常年提前1周左右。目前，长江流域油菜大部分处于开花期，其中上游地区已进入盛花末期，即将转入角果发育成熟期，下游地区晚播油菜也已进入初花期。开花结实期是油菜产量形成的关键时期，总角果数、角粒数、粒重都在这个时期决定，抓好当前田间管理十分重要。\u003C/p>\u003Cp>　　\u003Cstrong>一是科学施药防病虫。\u003C/strong>主要防菌核病和蚜虫。\u003Cspan style=\"color: rgb(31, 73, 125);\">在油菜初花期即要全面开展菌核病防治，\u003C/span>一般每亩用50毫升25%咪鲜胺乳油，或40%菌核净可湿性粉剂100克，兑水50-75公斤全株喷雾。喷雾时尽量向油菜茎秆中下部位喷药，以提高防效。重发病田块间隔5-7天再防治一次。有条件的应积极推广无人机或大型机械喷雾，提高喷洒效果和作业效率，降低防治成本。\u003Cspan style=\"color: rgb(31, 73, 125);\">开春以后温度上升较快，油菜蚜虫易爆发\u003C/span>，应及时采取措施预防，每亩可用10%吡虫啉10-20克，兑水50公斤喷雾防治。\u003C/p>\u003Cp>　　\u003Cstrong>二是叶面喷肥防早衰。\u003C/strong>在油菜开花期，结合菌核病的防治，进行叶面喷肥，能够延长光合器官的功能期，促进糖分转化和运转，增角果、增粒数、增粒重作用显著。叶面喷肥一般以磷肥、钾肥、硼肥为主，但对长势较差、有早衰趋势的田块，还需配合喷施氮肥。\u003Cspan style=\"color: rgb(31, 73, 125);\">一般每亩喷施磷酸二氢钾100-150克、尿素150-200克、速效硼肥50-100克，兑水50-75公斤均匀喷雾。\u003C/span>要喷足水分，使叶面充分湿润。\u003C/p>\u003Cp>　　\u003Cstrong>三是清沟排渍防倒伏。\u003C/strong>青荚期是防止油菜倒伏的关键时期，特别是直播油菜由于茎秆较细或受渍害影响，更要注意防止倒伏。对于还处于花期的油菜田块，要加大菌核病防治力度，可减轻因病害带来的倒伏风险。早春长江流域部分地区雨水增多，要及早清理沟系，特别是稻茬田块，更要注意排渍防涝，防止出现土壤松软造成倒伏。植株较大的移栽油菜可以通过围栏、分区的办法防止倒伏。\u003C/p>","2016-04-08 09:29:45","2016-04-11 09:00:46","08b80d56a9174bda87efa07f278efe31","2016-04-11 08:46:43","f8f9e0831d97445782ef0ea6d850264c","https://api-tx2.hedadata.com/files/news/20160408/f2616c3489154844851f609df10ae88f.jpg","4","0","2000-01-01 00:00:00","1",8,99,"农业部新闻办公室","2","开花结实期是油菜产量形成的关键时期，总角果数、角粒数、粒重都在这个时期决定，抓好当前田间管理十分重要。​","\\files\\news\\20160408\\f2616c3489154844851f609df10ae88f-thumbnail.jpg","长江流域油菜春季管理","news","2016-04-11 08:58:33",1790158177837]