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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(jiàn)

2023-07-12 10:48:32 來(lái)源：安徽省農(nóng)業(yè)技術(shù)推廣總站 閱讀量：15488 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(guò)大、長(zhǎng)勢(shì)過(guò)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(zhuān)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(jiàn)。
 
　　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(kāi)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(guò)大(玉米4500株/畝以上、大豆8000株/畝以上)、植株長(zhǎng)勢(shì)過(guò)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(kāi)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(kāi)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(guò)早過(guò)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(shuō)明書(shū)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(wú)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(kāi)葉片數(shù)進(jìn)行化控(展開(kāi)葉：葉耳出現(xiàn)或者完全打開(kāi))，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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