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北方冬麥區(qū)大部墑情適宜 局地不足 應(yīng)巧灌水預(yù)防干熱風(fēng)

2024-05-16 08:38:13 來源：全國農(nóng)業(yè)技術(shù)推廣服務(wù)中心 閱讀量：20678 評論

　　【農(nóng)機網(wǎng) 熱點關(guān)注】 據(jù)全國農(nóng)技中心5月14日土壤墑情監(jiān)測，北方冬麥區(qū)大部墑情適宜，局地不足。0－20cm土壤相對含水量43%－85%，20－40cm土壤相對含水量51%－88%。28.94%的監(jiān)測站點土壤相對含水量環(huán)比升高，67.23%的站點土壤相對含水量環(huán)比降低。0－20cm土層和20－40cm土層土壤相對含水量低于65%的監(jiān)測站點分別占29.18%和19.52%。河北滄州、衡水、邢臺，山西長治、臨汾、晉城、運城，河南鄭州、洛陽、三門峽、商丘、焦作、駐馬店、南陽等地市旱地或未及時灌溉的麥田0-20cm土壤相對含水量低于65%，墑情不足。

據(jù)氣象部門預(yù)測，未來10天，河北西南部、黃淮大部將出現(xiàn)0－10mm降水。17－19日，華北中南部、黃淮及陜西關(guān)中部分地區(qū)有2－3天日最高氣溫為35－37℃的高溫天氣，以上冬麥區(qū)可能出現(xiàn)中到重度干熱風(fēng)天氣。要加強小麥田間水肥管理，“干熱風(fēng)”來臨前可采取微噴灌或小水細(xì)灌等灌溉措施，增加田間濕度，降低冠層溫度。微噴灌畝灌水10－15方，小水細(xì)灌畝灌水20－25方，灌溉宜避開午后高溫時段和大風(fēng)天氣。灌漿中期小麥灌水量不宜過大，以防后期倒伏。應(yīng)抓好“一噴三防”，麥田在灌漿初期和中期各噴一次濃度為0.2%－0.3%磷酸二氫鉀溶液或葉面肥，增強小麥抗御“干熱風(fēng)”能力，促進(jìn)籽粒灌漿和干物質(zhì)轉(zhuǎn)移，提高千粒重。

 

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