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2024年大豆玉米帶狀復(fù)合種植田雜草防治技術(shù)指導(dǎo)意見(jiàn)

2024-04-19 09:46:06 來(lái)源:全國(guó)農(nóng)業(yè)技術(shù)推廣服務(wù)中心 閱讀量:14619 評(píng)論

導(dǎo)讀:為規(guī)范除草劑使用技術(shù),提高大豆玉米帶狀復(fù)合種植田雜草防治效果,特制定本指導(dǎo)意見(jiàn)。

  【農(nóng)機(jī)網(wǎng) 地方農(nóng)機(jī)】大豆玉米帶狀復(fù)合種植是當(dāng)前擴(kuò)種大豆的有效技術(shù)措施之一,是傳統(tǒng)間套種技術(shù)的創(chuàng)新發(fā)展,對(duì)除草劑品種選擇、施用時(shí)間、施藥方式等提出了更高要求。為規(guī)范除草劑使用技術(shù),提高大豆玉米帶狀復(fù)合種植田雜草防治效果,特制定本指導(dǎo)意見(jiàn)。
 
  一、防控策略
 
  堅(jiān)持綜合防治的植保方針,充分發(fā)揮翻耕旋耕除草、地膜覆蓋除草等農(nóng)業(yè)物理措施的作用,降低田間雜草發(fā)生基數(shù),減輕化學(xué)除草壓力。使用化學(xué)除草劑堅(jiān)持“播后苗前土壤封閉處理為主、苗后莖葉定向或隔離噴霧處理為輔”的施用策略,因地制宜開(kāi)展“土壤封閉+”防治技術(shù)模式(土壤封閉+旋耕滅茬+澆水造墑+莖葉補(bǔ)防),力爭(zhēng)雜草防治效果達(dá)到90%以上,實(shí)現(xiàn)玉米不減產(chǎn),增收一季豆。
 
  因地制宜。根據(jù)播種時(shí)期、種植模式、雜草種類等制定雜草防治技術(shù)方案,突出重點(diǎn)區(qū)域、把握關(guān)鍵環(huán)節(jié),科學(xué)選用適宜的除草劑品種和使用劑量,開(kāi)展分類精準(zhǔn)指導(dǎo)。
 
  治早治小。優(yōu)先選用播后苗前土壤封閉處理的除草方式,減輕苗后除草壓力。苗后除草重點(diǎn)抓好闊葉雜草防治,特別是在苗期和幼苗期等雜草防治的關(guān)鍵階段,確保除草效果。
 
  安全高效。雜草防治使用的除草劑品種要確保高效低風(fēng)險(xiǎn),對(duì)本茬大豆、玉米及周邊作物的生長(zhǎng)安全,同時(shí)對(duì)下茬作物不會(huì)造成影響。
 
  二、技術(shù)措施
 
  (一)大豆玉米帶狀套作
 
  在西南地區(qū),多采用玉米先于大豆播種的套作模式,除草劑使用應(yīng)“封殺結(jié)合”。玉米播后苗前選用精異丙甲草胺(或乙草胺)+唑嘧磺草胺(或噻吩磺隆)等藥劑進(jìn)行土壤封閉處理,如果玉米播前田間已有雜草的,可用草銨膦噴霧;土壤封閉效果不理想需莖葉噴霧處理的,可在玉米苗后3—5葉期選用煙嘧磺隆+氯氟吡氧乙酸(或二氯吡啶酸、滅草松),在玉米種植帶定向莖葉噴霧。
 
  大豆播種前3天,選用草銨膦在田間空行進(jìn)行定向噴霧殺除大豆帶已經(jīng)出土的雜草。播后苗前選用精異丙甲草胺(或二甲戊靈、乙草胺)+唑嘧磺草胺等藥劑進(jìn)行土壤封閉處理。土壤封閉效果不理想需莖葉噴霧處理的,在大豆3—4片三出復(fù)葉期選用精喹禾靈(或高效氟吡甲禾靈、精吡氟禾草靈、烯草酮)+乙羧氟草醚(或滅草松),在大豆種植帶定向莖葉噴霧。
 
  (二)大豆玉米帶狀間作
 
  在黃淮海、長(zhǎng)江中下游和西北地區(qū),大豆玉米同期播種。上茬作物收獲后及時(shí)進(jìn)行旋耕滅茬或秸稈打捆離田,在播種后2天內(nèi),土壤墑情適宜的條件下,選用精異丙甲草胺(或異丙甲草胺、乙草胺、二甲戊靈)+唑嘧磺草胺(或噻吩磺隆)等藥劑進(jìn)行處理。
 
  在黃淮海、長(zhǎng)江中下游地區(qū),當(dāng)前茬為小麥的田塊土壤封閉處理時(shí),種植前最好進(jìn)行物理旋耕滅茬、澆水造墑,然后播種施藥;麥茬直播的田塊,需加大畝用水量,有條件的在施藥后及時(shí)澆水,將小麥秸稈上沾附的藥劑淋溶到土壤表面,提高封閉效果。
 
  在西北地區(qū),積極推廣黑色地膜覆膜除草技術(shù),降低田間雜草發(fā)生基數(shù)。在干旱、風(fēng)沙大的地區(qū),噴施土壤封閉處理除草劑后最好進(jìn)行混土,提高除草效果。
 
  當(dāng)土壤封閉效果不理想需莖葉噴霧處理時(shí),可在玉米苗后3—5葉期,大豆2—3片三出復(fù)葉期,雜草2—5葉期,根據(jù)當(dāng)?shù)夭萸?,玉米田選用煙嘧磺隆(或苯唑草酮)+滅草松(或氯氟吡氧乙酸)、大豆田選用精喹禾靈(或高效氟吡甲禾靈)+滅草松(或乙羧氟草醚)莖葉定向或隔離噴霧除草(要采用物理隔簾將玉米大豆隔開(kāi)施藥)。難防雜草可適時(shí)人工拔除。
 
  三、注意事項(xiàng)
 
  (一)優(yōu)先選用精異丙甲草胺、異丙甲草胺、乙草胺、二甲戊靈、唑嘧磺草胺、噻吩磺隆、滅草松等7種同時(shí)登記在玉米和大豆上的除草劑。根據(jù)2023年各地試驗(yàn)結(jié)果,精異丙甲草胺+唑嘧磺草胺、砜吡草唑+嗪草酮等藥劑進(jìn)行土壤封閉處理具有較好的除草效果,各地可根據(jù)產(chǎn)品登記情況選擇使用。
 
  (二)在選擇莖葉處理除草劑時(shí),要注意選用對(duì)臨近作物和下茬作物安全性高的除草劑品種,精喹禾靈、高效氟吡甲禾靈、精吡氟禾草靈和烯草酮等藥劑飄移易導(dǎo)致玉米藥害,氯氟吡氧乙酸和二氯吡啶酸等藥劑飄移易導(dǎo)致大豆藥害。如發(fā)生除草劑藥害,及時(shí)噴施蕓苔素內(nèi)酯、赤霉酸、磷酸二氫鉀等,可在一定程度上緩解藥害。同時(shí),應(yīng)加強(qiáng)水肥管理,促根壯苗,增強(qiáng)抗逆性,促進(jìn)作物快速恢復(fù)生長(zhǎng)。
 
  (三)莖葉處理除草劑用藥量要按照每種作物的實(shí)際種植面積進(jìn)行計(jì)算,不得重噴和隨意加大藥量。莖葉噴霧時(shí)須在玉米帶和大豆帶間設(shè)置隔離裝置,防止藥液飄移造成藥害。施藥器械可選用背負(fù)式電動(dòng)噴霧器(需在噴頭處加裝防護(hù)罩),或選用帶隔簾、能將大豆玉米分隔施藥的自走式噴桿噴霧機(jī),噴頭離地高度以施藥?kù)F滴不超出大豆帶或玉米帶為準(zhǔn);選擇非同時(shí)登記在大豆和玉米上的除草劑時(shí),嚴(yán)禁霧滴超出大豆帶或玉米帶。
 
  (四)噴施除草劑時(shí),要注意風(fēng)力、風(fēng)向及晴雨等天氣變化。施藥時(shí)間選擇在上午10點(diǎn)之前和下午4點(diǎn)以后,晴天無(wú)風(fēng)時(shí)用藥,雨天、大風(fēng)天禁止用藥,以防藥效降低及霧滴飄移產(chǎn)生藥害。
 
  來(lái)源:全國(guó)農(nóng)業(yè)技術(shù)推廣服務(wù)中心
 
  責(zé)編:劉   博
 
  審核:李昕澤
 
  統(tǒng)籌:王玉重
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