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安徽省大豆玉米帶狀復合種植化學控旺技術指導意見

2023-07-12 10:48:32 來源:安徽省農業技術推廣總站 閱讀量:15221 評論

導讀:當前,安徽省大豆玉米帶狀復合種植總體長勢良好,玉米已陸續進入拔節期,大豆已陸續進入分枝期。

  【農機網 地方農機】當前,安徽省大豆玉米帶狀復合種植總體長勢良好,玉米已陸續進入拔節期,大豆已陸續進入分枝期,由于今年播種期墑情好、苗期雨量充沛,部分復合種植田塊存在大豆玉米密度過大、長勢過旺現象,為降低復合種植中后期倒伏和玉米空桿、大豆落花癟莢風險,保證豐產豐收,安徽省農業技術推廣總站、安徽省玉米產業技術體系、安徽省油料產業技術體系會同農業農村部大豆玉米復合種植專家指導組成員王小春教授制定了2023年安徽省大豆玉米帶狀復合種植化學控旺技術指導意見。
 
  一、化學控旺基本原則
 
  結合天氣條件和植株長勢適時、適期、適情開展化學控旺防倒,堅持“控高不控低、控旺不控弱、控綠不控黃”原則。
 
  二、化學控旺適用范圍
 
  對高肥水、密度過大(玉米4500株/畝以上、大豆8000株/畝以上)、植株長勢過旺或品種抗倒性不足的大豆玉米復合種植田塊進行化學控旺。
 
  三、化學控旺合理時期
 
  玉米在7-9片展開葉,肥力水平高、密度大的地塊選低葉齡,反之選高葉齡;大豆在分枝期(4-5片復葉)和初花期開展兩次化學控旺,密度大、封行早的或前期控旺效果不明顯的,可在2-3個復葉或盛花期加噴一次。玉米化控不可過早過晚,避免出現因化控導致生殖生長不正常,影響后期產量。
 
  四、化學控旺藥劑選擇
 
  玉米化控劑可選擇30%胺鮮脂.乙烯利、玉米健壯素等,大豆化控劑可選擇5%的烯效唑或30%多唑甲哌鎓。
 
  五、化學控旺施藥方法
 
  嚴格按照化控劑產品使用說明書的推薦濃度、劑量和時期施用,生長前期,可選用低劑量濃度,后期選用高劑量濃度。采用高地隙噴桿噴霧機或背負式噴霧器分別噴施。大豆初花期化控時,可采用高效植保無人機統一噴施烯效唑進行化學控旺。
 
  六、化學控旺注意事項
 
  1.藥液隨配隨用,不可久存。
 
  2.杜絕與堿性農藥、葉面肥混用,不可與蕓苔素內酯混用。
 
  3.化控劑噴施時要做到不漏噴,均勻噴施,正常情況下杜絕重噴,噴后6小時內遇雨,可在雨后酌情減量重噴(減量50%)。
 
  4.如遇后期可能持續高溫干旱天氣,要適當降低化控劑用量(減量30%-50%)。
 
  5. 玉米要嚴格按照展開葉片數進行化控(展開葉:葉耳出現或者完全打開),葉片計數掌握不準時可參考“五光六毛”原則。
 
  安徽省農業技術推廣總站
 
  安徽省玉米產業技術體系
 
  2023.7.11
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