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科学有效应对当前“烂场雨”技术指导意见

2023-06-02 09:22:33 来源:中国农机化协会 阅读量:15383 评论

导读:为科学应对“烂场雨”,各地要坚持“四抢”(抢排积水、抢抓田管、抢时收获、抢晴晾晒)、“两降”(降渍涝、降损失)、“两防”(防病虫、防霉变),加强田间管理,强化防灾减灾,减少产量损失,确保颗粒归仓,努力夺取夏粮丰产丰收。

  【农机网 热点关注】当前,主产区小麦陆续进入收获期,是确保颗粒归仓、夺取夏粮丰收的关键时期。5月下旬,北方地区出现明显降雨,局地发生暴雨、大风、冰雹等强对流天气,江淮、黄淮大部降水量达25—80毫米、局部100—200毫米。受连阴雨天气影响,部分地区出现“烂场雨”,个别麦田倒伏受淹,易导致霉变和穗发芽,影响小麦产量和质量。为科学应对“烂场雨”,各地要坚持“四抢”(抢排积水、抢抓田管、抢时收获、抢晴晾晒)、“两降”(降渍涝、降损失)、“两防”(防病虫、防霉变),加强田间管理,强化防灾减灾,减少产量损失,确保颗粒归仓,努力夺取夏粮丰产丰收。
 
  抢排积水降渍涝
 
  对降水较多地区,要及时清沟理墒,畅通麦田沟系,确保雨止田干,降低麦田湿度,保持根系活力,减少倒伏概率,同时确保雨后农机能尽早下田抢收。对无沟系配套、短时无法排水麦田,要及时调度适宜排涝机具,抢排田间积水。特别对倒伏麦田,要加快排水降渍,避免麦穗泡在水中导致穗发芽,减少霉变发生。
 
  抢抓田管防病虫
 
  对处于灌浆期的麦田,要持续抓好田间管理,强化“一喷三防”。要根据病虫发生情况,科学选药用药,同时混合喷施磷酸二氢钾、尿素或生长调节剂,防逼熟防早衰,促灌浆提粒重,增产量保质量。对倒伏麦田,群体内荫蔽程度增加,易加重病害发生,要强化病害防控,实施无人机统一作业。
 
  抢时收获降损失
 
  密切关注天气变化,做好抢时收获。根据成熟程度,合理调配农机,安排收获进度。对处于蜡熟末期的麦田,抢在大雨来临前收获,预防穗发芽,并为下茬播种创造良好条件。对倒伏麦田,加装扶倒器、分禾器,适度降低割台,减缓行进速度,减少机收损失。对穗发芽麦田,分类抢收,分类存储,分类销售。
 
  抢晴晾晒防霉变
 
  要抢抓晴好天气,利用有利场地抓紧晾晒,降低水分含量,防止霉变发生。有条件的地方,利用设施烘干作业,也可自建应急风干设施,尽快使籽粒含水量降至安全水分,避免发芽和霉变,及早入仓入库。对因雨来不及入库或室内不具备晾干条件的,要覆盖防雨膜,雨停后及时揭膜晾晒,减少霉变。
 
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