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2020年東北春玉米后期田間管理技術(shù)指導(dǎo)意見

2020-08-06 08:50:37 來源：農(nóng)業(yè)農(nóng)村部新聞辦公室 閱讀量：16323 評(píng)論

導(dǎo)讀：當(dāng)前，東北地區(qū)春玉米已陸續(xù)進(jìn)入籽粒灌漿期，是產(chǎn)量形成的關(guān)鍵時(shí)期。針對(duì)近期東北地區(qū)氣象變化和春玉米生育進(jìn)程，農(nóng)業(yè)農(nóng)村部玉米專家指導(dǎo)組會(huì)同全國(guó)農(nóng)業(yè)技術(shù)推廣服務(wù)中心制定了2020年東北春玉米后期田間管理技術(shù)指導(dǎo)意見。

　　【農(nóng)機(jī)網(wǎng) 熱點(diǎn)關(guān)注】 當(dāng)前，東北地區(qū)春玉米已陸續(xù)進(jìn)入籽粒灌漿期，是產(chǎn)量形成的關(guān)鍵時(shí)期。針對(duì)近期東北地區(qū)氣象變化和春玉米生育進(jìn)程，農(nóng)業(yè)農(nóng)村部玉米專家指導(dǎo)組會(huì)同全國(guó)農(nóng)業(yè)技術(shù)推廣服務(wù)中心制定了2020年東北春玉米后期田間管理技術(shù)指導(dǎo)意見。
 
　　一是抗旱排澇促生長(zhǎng)。根據(jù)天氣變化，做好土壤墑情監(jiān)測(cè)。針對(duì)出現(xiàn)旱情的地塊，及時(shí)灌溉或人工增雨，落實(shí)抗旱保苗措施，避免因旱嚴(yán)重減產(chǎn)。針對(duì)近期連續(xù)降雨的地區(qū)，注意及時(shí)排除低洼溝壑易澇等地塊的積水。若發(fā)生倒伏，及時(shí)扶正并培土。
 
　　二是肥水調(diào)控增粒重。根據(jù)土壤水分、養(yǎng)分狀況和植株長(zhǎng)勢(shì)，結(jié)合澆水或降雨追施*氮肥，并適當(dāng)增施鉀肥，防止貪青晚熟。也可葉面噴施磷酸二氫鉀、尿素等混合液，促進(jìn)光合產(chǎn)物積累，增加粒重。特別是對(duì)因旱導(dǎo)致發(fā)育延遲的地塊，要及時(shí)補(bǔ)水灌溉，加強(qiáng)田間管理，促進(jìn)生長(zhǎng)發(fā)育和提早成熟。
 
　　三是統(tǒng)防統(tǒng)治控病蟲。加強(qiáng)對(duì)草地貪夜蛾、大斑病、莖腐病、玉米螟、粘蟲等病蟲害的動(dòng)態(tài)監(jiān)測(cè)和預(yù)警，綜合運(yùn)用農(nóng)業(yè)、物理、化學(xué)等手段，統(tǒng)防統(tǒng)治、群防群治、綠色防控，提高防控效果，降低產(chǎn)量損失，提高籽粒品質(zhì)。
 
　　四是安全成熟防早霜。密切關(guān)注氣溫變化和霜凍預(yù)警，針對(duì)早春低溫晚播生長(zhǎng)發(fā)育延遲或受旱澇影響地塊，灌漿后期采用無人機(jī)適時(shí)適量噴施磷酸二氫鉀或具有促早熟作用的生長(zhǎng)調(diào)節(jié)劑，增強(qiáng)植株抗逆性，加快籽粒灌漿，提高籽粒充實(shí)度，促進(jìn)安全成熟，規(guī)避早霜風(fēng)險(xiǎn)。同時(shí)，堅(jiān)持抓好放秋壟、拔大草等常規(guī)促早熟技術(shù)措施，提高田間通風(fēng)透光能力，促進(jìn)早熟。
 
　　五是適時(shí)晚收奪高產(chǎn)。充分利用玉米后熟性強(qiáng)的特點(diǎn)，發(fā)揮機(jī)械收獲優(yōu)勢(shì)，在秋季早霜來臨前盡量延遲玉米收獲時(shí)間，促進(jìn)養(yǎng)分積累，保證籽粒充分成熟，加速果穗和籽粒脫水，降低籽粒含水率，提高玉米產(chǎn)量和籽粒品質(zhì)。

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