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安徽省應對干旱大豆玉米播種技術指導意見

2024-06-11 08:58:32 來源：安徽省農業技術推廣總站 閱讀量：20093 評論

　　【農機網 科技創新】 當前，我省夏種已陸續展開，據氣象部門預測，大豆玉米主產區氣溫較往年偏高1-1.5℃，未來10天淮北地區最高氣溫普遍超過30℃，局部時段將出現35℃以上高溫天氣，降水較往年偏少1-3成，墑情不足。針對當前旱情提出如下技術指導意見：
 
　　1.及時搶墑播種。土壤墑情適宜的要搶墑播種，墑情差的要及時造墑播種或播后澆水補墑。有水肥一體化條件的地塊建議播后“滴水出苗”，玉米力爭6月15日前、大豆力爭6月25日前完成播種。
 
　　2.提高播種質量。建議播種前采用種衣劑拌種，提高大豆玉米出苗和保苗率。播前麥秸較多的田塊，秸稈要打捆離田或者滅茬，減少播種時機器堵塞，預防缺苗斷壟。為減少水分蒸發，建議板茬直播，提倡采用精量播種機播種，有條件的加裝導航設備，保證播種行株距均勻。大豆播深3cm-4cm，玉米播深4cm-5cm。
 
　　3.及時查苗補苗。出苗后及時查苗補苗，對缺苗斷壟的田塊盡快進行移苗補栽，確保苗全、苗勻。一般地塊大豆畝保苗1.2萬-1.5萬株，玉米畝保苗0.45萬-0.5萬株，土壤水肥條件較好地塊可適當提高種植密度。
 
　　4.做好病蟲防控。土壤墑情較好的田塊，采取播后苗前化學封閉除草。未封閉除草或封閉除草效果不理想的田塊，可根據土壤墑情情況、雜草種類和草齡大小，選擇對路的除草劑進行莖葉防除。根據病蟲發生情況，及時做好苗期病蟲害防治指導。
 
　　5.嚴防旱澇急轉。防止苗后集中降雨，旱澇急轉，于播后苗前開好三溝，預防澇漬災害。根據田塊和播種行向情況安排開溝方向及開溝數量，一般溝深20cm，溝寬15cm-20cm，確保三溝通暢。
 
　　安徽省農業技術推廣總站
 
　　2024年6月5日

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