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黃淮?？购低聿ゼ案姆N補(bǔ)種技術(shù)意見

2024-06-25 08:39:47 來源：全國(guó)農(nóng)業(yè)技術(shù)推廣服務(wù)中心 閱讀量：15356 評(píng)論

導(dǎo)讀：為全力抓好抗旱保夏播，各地要以“熟期配套、搶時(shí)播種、適時(shí)改種”為重點(diǎn)，分區(qū)域、分時(shí)段安排品種布局，落實(shí)抗旱措施，適時(shí)改種補(bǔ)種，最大程度減輕災(zāi)害損失。

　　【農(nóng)機(jī)網(wǎng) 熱點(diǎn)關(guān)注】 5月以來，黃淮海持續(xù)高溫少雨，氣溫比常年同期偏高1.5—1.8℃，降水量偏少5—7成，部分地區(qū)出現(xiàn)較重旱情，對(duì)夏玉米夏大豆適期播種帶來不利影響。特別是局地沒有水源條件、無法抗旱播種的田塊，如果旱情持續(xù)、錯(cuò)過大豆玉米播期，將不得不改種其他作物。為全力抓好抗旱保夏播，各地要以“熟期配套、搶時(shí)播種、適時(shí)改種”為重點(diǎn)，分區(qū)域、分時(shí)段安排品種布局，落實(shí)抗旱措施，適時(shí)改種補(bǔ)種，最大程度減輕災(zāi)害損失。
 
　　根據(jù)播期選品種
 
　　黃淮海北片玉米播期一般不晚于7月5日，黃淮海南片不晚于7月10日。黃淮海大豆播期一般不晚于6月底。統(tǒng)籌考慮旱災(zāi)程度、播種計(jì)劃、種子儲(chǔ)備等情況，選擇生育期適宜、耐密抗倒、耐旱抗逆的品種，確保玉米大豆種足種滿。一般6月25日前可選擇生育期100天左右的中熟或中早熟品種，6月30日前可選擇生育期100天以內(nèi)的中早熟品種，7月上旬可選擇生育期95天左右的早熟品種。防止盲目引種、跨區(qū)種植。
 
　　根據(jù)條件落措施
 
　　對(duì)具備水澆條件的地塊，盡快造墑播種或“坐水”播種，玉米播后可澆“蒙頭水”，澆水要錯(cuò)開中午高溫時(shí)段，水量適宜保持田間濕潤(rùn)即可。對(duì)沒有灌溉條件、即將出現(xiàn)有效降雨的地區(qū)，提前播種，等雨出苗。對(duì)晚播地塊，選用耐密品種，適當(dāng)增加密度，并及時(shí)化控。施足底肥保證全養(yǎng)分供應(yīng)，提前5—7天追肥，以肥促苗早發(fā)。此外，干旱條件下蟲害易重發(fā)，要做好苗期蟲害防控。
 
　　根據(jù)農(nóng)時(shí)抓改種
 
　　對(duì)旱情不能及時(shí)解除、又沒有水澆條件的地塊，要適時(shí)改種補(bǔ)種。7月上旬前，可改種生育期適宜的鮮食玉米、甘薯、糜子、蕎麥、綠豆等作物；甘薯可選用短生育期、結(jié)薯早的鮮食品種，適當(dāng)增加栽插密度至每畝4000株左右，澆足活顆水保障快速返苗；糜子可選用生育期90天左右的中早熟或早熟品種，等雨機(jī)械條播或穴播，畝基本苗4萬—6萬株；綠豆可選用早熟或極早熟品種，采用機(jī)械播種或人工點(diǎn)播，畝留苗1.3萬—1.5萬株。7月中旬前，改種鮮食玉米需注意足墑播種，畝密度為3000—3500株，改種蕎麥畝保苗6萬—8萬株，適當(dāng)加大播種量和播深，播后及時(shí)鎮(zhèn)壓，保證出苗率。7月下旬后，及時(shí)補(bǔ)種露地蔬菜等短生育期作物，等雨帶水播種，確保正常出苗。
 
　　來源：農(nóng)業(yè)農(nóng)村部玉米大豆專家指導(dǎo)組、全國(guó)農(nóng)業(yè)技術(shù)推廣服務(wù)中心

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