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北方冬麦区大部墒情适宜 局地不足 应巧灌水预防干热风

2024-05-16 08:38:13 来源:全国农业技术推广服务中心 阅读量:20484 评论

导读:据全国农技中心5月14日土壤墒情监测,北方冬麦区大部墒情适宜,局地不足。

  【农机网 热点关注】 据全国农技中心5月14日土壤墒情监测,北方冬麦区大部墒情适宜,局地不足。0-20cm土壤相对含水量43%-85%,20-40cm土壤相对含水量51%-88%。28.94%的监测站点土壤相对含水量环比升高,67.23%的站点土壤相对含水量环比降低。0-20cm土层和20-40cm土层土壤相对含水量低于65%的监测站点分别占29.18%和19.52%。河北沧州、衡水、邢台,山西长治、临汾、晋城、运城,河南郑州、洛阳、三门峡、商丘、焦作、驻马店、南阳等地市旱地或未及时灌溉的麦田0-20cm土壤相对含水量低于65%,墒情不足。

据气象部门预测,未来10天,河北西南部、黄淮大部将出现0-10mm降水。17-19日,华北中南部、黄淮及陕西关中部分地区有2-3天日最高气温为35-37℃的高温天气,以上冬麦区可能出现中到重度干热风天气。要加强小麦田间水肥管理,“干热风”来临前可采取微喷灌或小水细灌等灌溉措施,增加田间湿度,降低冠层温度。微喷灌亩灌水10-15方,小水细灌亩灌水20-25方,灌溉宜避开午后高温时段和大风天气。灌浆中期小麦灌水量不宜过大,以防后期倒伏。应抓好“一喷三防”,麦田在灌浆初期和中期各喷一次浓度为0.2%-0.3%磷酸二氢钾溶液或叶面肥,增强小麦抗御“干热风”能力,促进籽粒灌浆和干物质转移,提高千粒重。

 

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