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安徽省大豆玉米帶狀復(fù)合種植化學(xué)控旺技術(shù)指導(dǎo)意見

2023-07-12 10:48:32 來源:安徽省農(nóng)業(yè)技術(shù)推廣總站 閱讀量:15443 評(píng)論

導(dǎo)讀:當(dāng)前,安徽省大豆玉米帶狀復(fù)合種植總體長(zhǎng)勢(shì)良好,玉米已陸續(xù)進(jìn)入拔節(jié)期,大豆已陸續(xù)進(jìn)入分枝期。

  【農(nóng)機(jī)網(wǎng) 地方農(nóng)機(jī)】當(dāng)前,安徽省大豆玉米帶狀復(fù)合種植總體長(zhǎng)勢(shì)良好,玉米已陸續(xù)進(jìn)入拔節(jié)期,大豆已陸續(xù)進(jìn)入分枝期,由于今年播種期墑情好、苗期雨量充沛,部分復(fù)合種植田塊存在大豆玉米密度過大、長(zhǎng)勢(shì)過旺現(xiàn)象,為降低復(fù)合種植中后期倒伏和玉米空桿、大豆落花癟莢風(fēng)險(xiǎn),保證豐產(chǎn)豐收,安徽省農(nóng)業(yè)技術(shù)推廣總站、安徽省玉米產(chǎn)業(yè)技術(shù)體系、安徽省油料產(chǎn)業(yè)技術(shù)體系會(huì)同農(nóng)業(yè)農(nóng)村部大豆玉米復(fù)合種植專家指導(dǎo)組成員王小春教授制定了2023年安徽省大豆玉米帶狀復(fù)合種植化學(xué)控旺技術(shù)指導(dǎo)意見。
 
  一、化學(xué)控旺基本原則
 
  結(jié)合天氣條件和植株長(zhǎng)勢(shì)適時(shí)、適期、適情開展化學(xué)控旺防倒,堅(jiān)持“控高不控低、控旺不控弱、控綠不控黃”原則。
 
  二、化學(xué)控旺適用范圍
 
  對(duì)高肥水、密度過大(玉米4500株/畝以上、大豆8000株/畝以上)、植株長(zhǎng)勢(shì)過旺或品種抗倒性不足的大豆玉米復(fù)合種植田塊進(jìn)行化學(xué)控旺。
 
  三、化學(xué)控旺合理時(shí)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(fù)葉)和初花期開展兩次化學(xué)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(gè)復(fù)葉或盛花期加噴一次。玉米化控不可過早過晚,避免出現(xiàn)因化控導(dǎo)致生殖生長(zhǎng)不正常,影響后期產(chǎn)量。
 
  四、化學(xué)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(xué)控旺施藥方法
 
  嚴(yán)格按照化控劑產(chǎn)品使用說明書的推薦濃度、劑量和時(shí)期施用,生長(zhǎng)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(jī)或背負(fù)式噴霧器分別噴施。大豆初花期化控時(shí),可采用高效植保無人機(jī)統(tǒng)一噴施烯效唑進(jìn)行化學(xué)控旺。
 
  六、化學(xué)控旺注意事項(xiàng)
 
  1.藥液隨配隨用,不可久存。
 
  2.杜絕與堿性農(nóng)藥、葉面肥混用,不可與蕓苔素內(nèi)酯混用。
 
  3.化控劑噴施時(shí)要做到不漏噴,均勻噴施,正常情況下杜絕重噴,噴后6小時(shí)內(nèi)遇雨,可在雨后酌情減量重噴(減量50%)。
 
  4.如遇后期可能持續(xù)高溫干旱天氣,要適當(dāng)降低化控劑用量(減量30%-50%)。
 
  5. 玉米要嚴(yán)格按照展開葉片數(shù)進(jìn)行化控(展開葉:葉耳出現(xiàn)或者完全打開),葉片計(jì)數(shù)掌握不準(zhǔn)時(shí)可參考“五光六毛”原則。
 
  安徽省農(nóng)業(yè)技術(shù)推廣總站
 
  安徽省玉米產(chǎn)業(yè)技術(shù)體系
 
  2023.7.11
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