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2024年糧食作物田雜草科學(xué)防控技術(shù)方案

2024-03-18 08:32:03 來源:全國(guó)農(nóng)業(yè)技術(shù)推廣服務(wù)中心 閱讀量:16562 評(píng)論

導(dǎo)讀:為有效防控水稻、玉米、馬鈴薯田雜草危害,推動(dòng)大面積單產(chǎn)提升,特制定本方案。

  【農(nóng)機(jī)網(wǎng) 熱點(diǎn)關(guān)注】 近年來,由于輕簡(jiǎn)化栽培、收割機(jī)械跨區(qū)作業(yè)以及長(zhǎng)期使用單一除草劑品種等因素影響,我國(guó)糧食作物田雜草種群結(jié)構(gòu)日趨復(fù)雜,稗草、馬唐等惡性雜草抗藥性水平持續(xù)上升,嚴(yán)重威脅我國(guó)糧食作物生產(chǎn)安全。為有效防控水稻、玉米、馬鈴薯田雜草危害,推動(dòng)大面積單產(chǎn)提升,特制定本方案。
 
  一、防控目標(biāo)
 
  堅(jiān)持“預(yù)防為主 綜合防治”的植保方針,以糧食作物大面積單產(chǎn)提升和除草劑減量控害為目標(biāo),突出重點(diǎn)區(qū)域、關(guān)鍵環(huán)節(jié)、惡性雜草,堅(jiān)持分類指導(dǎo)、分區(qū)施策,采取以農(nóng)業(yè)措施為基礎(chǔ),化學(xué)措施為重要手段,重點(diǎn)示范推廣“三個(gè)一”(一批農(nóng)業(yè)生態(tài)控草技術(shù)、一批高效低毒低風(fēng)險(xiǎn)藥劑品種、一批雜草綜合治理模式)控草技術(shù),實(shí)現(xiàn)雜草防治處置率達(dá)到90%以上,防治效果90%以上,雜草危害損失控制在5%以下的目標(biāo)。
 
  二、防控原則
 
  糧食作物田雜草防控應(yīng)該堅(jiān)持以下三個(gè)基本原則:
 
  堅(jiān)持綜合防控。充分發(fā)揮輪作休耕、深耕除草、覆蓋除草、調(diào)控水層等農(nóng)業(yè)、物理及生態(tài)措施的作用,及時(shí)清除田埂、溝渠雜草,發(fā)揮生態(tài)控草作用,降低雜草發(fā)生基數(shù),科學(xué)推廣“封殺結(jié)合”的化學(xué)除草技術(shù)。
 
  堅(jiān)持治早治小。出苗期和幼苗期是雜草防控的關(guān)鍵階段。根據(jù)糧食作物栽培模式、土壤墑情以及除草劑特性,優(yōu)先進(jìn)行土壤封閉處理,在雜草幼苗期趁早實(shí)施莖葉噴霧處理;但在轉(zhuǎn)基因耐除草劑玉米田要等雜草出多、出齊后,再噴施草甘膦,以保證雜草防除效果。
 
  堅(jiān)持減量增效。加強(qiáng)除草劑科學(xué)安全使用指導(dǎo),大力推廣除草劑減量使用技術(shù),選用高效安全除草劑品種和增效助劑,輪換使用不同作用機(jī)理除草劑產(chǎn)品,堅(jiān)持對(duì)靶選藥、適時(shí)適量施藥,嚴(yán)防違規(guī)用藥,避免亂用藥,減少因藥劑使用不當(dāng)引起的藥害事故或飄移現(xiàn)象。
 
  三、防控措施
 
  (一)稻田雜草防控方案
 
  稻田雜草常年發(fā)生面積2.9億畝以上。根據(jù)水稻種植方式、雜草種類與分布特點(diǎn),開展分類指導(dǎo)。東北稻區(qū)重點(diǎn)防控“一草三菜”(稗草、野慈姑、雨久花、澤瀉)以及扁稈藨草、螢藺等莎草科雜草,長(zhǎng)江中下游稻區(qū)和華南稻區(qū)重點(diǎn)防控“兩草三菜”(稗草、千金子、水莧菜、鴨舌草、丁香蓼)以及異型莎草等莎草科雜草。
 
  1.非化學(xué)控草技術(shù)
 
  精選種子。通過對(duì)稻種過篩、風(fēng)揚(yáng)、水選等措施,汰除雜草種子,防止雜草種子遠(yuǎn)距離傳播與危害。農(nóng)業(yè)措施。通過土地深翻平整、清潔田園、水層管理、誘導(dǎo)出草、肥水壯苗、水旱輪作、合理換茬等措施,形成不利于雜草萌芽的環(huán)境,保持有利于水稻良好生長(zhǎng)的生態(tài)條件,促進(jìn)水稻生長(zhǎng)。在水稻生長(zhǎng)中后期,雜草果實(shí)成熟脫落前,可人工拔除雜草果穗,避免新一代雜草種子侵染田間。生物措施。在水稻活棵后至抽穗前,通過人工放鴨、稻田養(yǎng)魚、蝦(蟹)稻共作等方式,發(fā)揮生物取食雜草子實(shí)和幼芽的作用,減少雜草的發(fā)生基數(shù)。物理措施。在進(jìn)水口安置尼龍紗網(wǎng)攔截雜草種子,田間灌水10—15厘米,待雜草種子聚集到田角后撈取水面漂浮的種子,減小土壤雜草種子庫數(shù)量。清除跨區(qū)或跨地作業(yè)的整地、插秧、施藥、收割等機(jī)械所攜帶的雜草種子及繁殖器官。分級(jí)淹水+黃腐酸。在水稻移栽后2—3天(拋秧田移栽后1—2天),施用黃腐酸并灌水5—8厘米保持20天;水直播田先在播種后3天淹水3—5厘米,待水稻出苗長(zhǎng)至二葉一心后,再淹水6—8厘米并施用黃腐酸保持20天,可明顯抑制雜草萌發(fā)與幼苗生長(zhǎng)。
 
  2.化學(xué)控草技術(shù)
 
  稻田雜草因地域、種植方式、種植季節(jié)的不同,采用的化除策略和除草劑品種有一定差異。經(jīng)測(cè)算,機(jī)插秧田以稗草—丁香蓼為混合優(yōu)勢(shì)雜草種群的化學(xué)防治指標(biāo)為2株/平方米,直播稻田以稗草—鴨舌草為混合優(yōu)勢(shì)雜草種群的化學(xué)防治指標(biāo)為1株/平方米(以產(chǎn)量損失率5%計(jì)算)。
 
  (1)機(jī)插秧田
 
  在東北稻區(qū)灌溉用水充足的稻田,雜草防控采用“兩封一殺”策略,插秧前5—7天采用粗霧滴噴施丙草胺、吡嘧磺隆、芐嘧磺隆、噁草酮、丙炔噁草酮、噁嗪草酮、乙氧氟草醚等及其復(fù)配制劑,進(jìn)行土壤封閉處理;插秧后10—12天(返青后),選用丙草胺、苯噻酰草胺、莎稗磷、五氟磺草胺、吡嘧磺隆、芐嘧磺隆等藥劑及其復(fù)配制劑進(jìn)行土壤封閉處理;插秧后20天左右,視草情選用五氟磺草胺、氰氟草酯、三唑磺草酮、二氯喹啉酸、噁唑酰草胺等藥劑及其復(fù)配制劑防治稗草、稻稗、稻李氏禾等禾本科雜草,選用氯氟吡啶酯、2甲4氯鈉、滅草松等藥劑及其復(fù)配制劑防治野慈姑、雨久花、澤瀉、扁稈藨草等闊葉雜草和莎草。在灌溉用水緊缺的稻田,雜草防控采用“一封一殺”策略,插秧前1—3天采用粗霧滴噴施丙草胺、噁草酮、丙炔噁草酮、吡嘧磺隆、芐嘧磺隆等及其復(fù)配制劑,進(jìn)行土壤封閉處理,插秧后20天選用五氟磺草胺、氰氟草酯、氯氟吡啶酯等藥劑及其復(fù)配制劑莖葉噴霧處理1次。
 
  在長(zhǎng)江流域及華南稻區(qū)機(jī)插秧田,雜草防控采用“一封一殺”策略。早稻插秧時(shí)氣溫較低,緩苗較慢,選擇在插秧后的7—10天,秧苗返青活棵后選用丙草胺、苯噻酰草胺、五氟磺草胺、芐嘧磺隆、吡嘧磺隆等藥劑及其復(fù)配制劑進(jìn)行土壤封閉處理,后期根據(jù)田間雜草發(fā)生情況進(jìn)行莖葉噴霧處理,選用氰氟草酯、噁唑酰草胺、氯氟吡啶酯、三唑磺草酮、二氯喹啉酸等藥劑及其復(fù)配制劑防治稗草、千金子等禾本科雜草,選用氯氟吡啶酯、2甲4氯鈉、吡嘧磺隆、滅草松等藥劑及其復(fù)配制劑防治鴨舌草、耳葉水莧、異型莎草等闊葉雜草及莎草。中晚稻在插秧前1—2天或插秧后5—7天選用丙草胺、芐嘧磺隆、吡嘧磺隆、苯噻酰草胺等藥劑及其復(fù)配制劑進(jìn)行土壤封閉處理;插秧后15—20天,選用五氟磺草胺、氰氟草酯、噁唑酰草胺、三唑磺草酮、二氯喹啉酸等藥劑及其復(fù)配制劑防治稗草、千金子等禾本科雜草,選用吡嘧磺隆、2甲4氯鈉、氯氟吡啶酯、滅草松等藥劑及其復(fù)配制劑防治鴨舌草、耳葉水莧、異型莎草等闊葉雜草及莎草。
 
  (2)水直播稻田
 
  在長(zhǎng)江流域及華南水直播稻田,雜草防控采用“一封一殺”策略。在氣候條件適宜的情況下,播后1—3天,選用丙草胺、芐嘧磺隆等藥劑及其復(fù)配制劑進(jìn)行土壤封閉處理;如果在播種后天氣條件不適宜,可將土壤封閉處理的時(shí)間推后,選用五氟磺草胺、丙草胺、氰氟草酯、三唑磺草酮等藥劑及其復(fù)配制劑采取封殺結(jié)合的方式進(jìn)行處理。在第一次用藥后,早稻間隔18—20天,中晚稻間隔12—15天,選用氰氟草酯、噁唑酰草胺、五氟磺草胺、氯氟吡啶酯、雙草醚等藥劑及其復(fù)配制劑防治稗草、千金子等禾本科雜草,選用芐嘧磺隆、吡嘧磺隆、2甲4氯鈉、滅草松等藥劑及其復(fù)配制劑防治鴨舌草、丁香蓼、異型莎草等闊葉雜草及莎草。
 
  (3)旱直播稻田
 
  在長(zhǎng)江流域旱直播稻田,雜草防控采用“一封一殺(一補(bǔ))”策略。播后苗前選用丙草胺、噁草酮、二甲戊靈等藥劑及其復(fù)配制劑進(jìn)行土壤封閉處理,第一次藥后15—20天選用五氟磺草胺、噁唑酰草胺、氰氟草酯、三唑磺草酮等藥劑及其復(fù)配制劑防治稗草、千金子、馬唐等禾本科雜草,選用2甲4氯鈉、滅草松、氯氟吡啶酯等藥劑及其復(fù)配制劑防治鴨舌草、丁香蓼、異型莎草等闊葉雜草及莎草。根據(jù)田間殘留草情,選用莖葉處理除草劑進(jìn)行補(bǔ)施處理。在西北旱直播稻田,雜草防控采用“一封一殺”策略。播后苗前選用仲丁靈及其復(fù)配制劑進(jìn)行土壤封閉處理,在水稻2—3葉期選用五氟磺草胺、氰氟草酯、噁唑酰草胺等藥劑及其復(fù)配制劑防治稗草、馬唐等禾本科雜草,選用吡嘧磺隆、2甲4氯鈉、滅草松等藥劑及其復(fù)配制劑防治鴨舌草、澤瀉、異型莎草等闊葉雜草和莎草。
 
  (4)人工移栽及拋秧稻田
 
  雜草防控采用“一次封(殺)”策略。在秧苗返青后,雜草出苗前,選用丙草胺、苯噻酰草胺、芐嘧磺隆、吡嘧磺隆、雙唑草腈等藥劑及其復(fù)配制劑進(jìn)行土壤封閉處理;或者在雜草2—3葉期,根據(jù)雜草發(fā)生情況,莖葉噴霧處理藥劑選擇同機(jī)插秧田。
 
  (二)玉米田雜草防控方案
 
  玉米田雜草常年發(fā)生面積4.2億畝以上。根據(jù)玉米輪作模式、雜草種類與分布特點(diǎn),開展分類指導(dǎo)。春玉米種植區(qū)重點(diǎn)防控“兩草兩菜”(馬唐、稗草、反枝莧、鴨跖草),夏玉米種植區(qū)重點(diǎn)防控“兩草三菜”(馬唐、稗草、反枝莧、馬齒莧、田旋花)等惡性雜草。
 
  1.非化學(xué)控草技術(shù)
 
  農(nóng)業(yè)措施。田間溝渠、地邊和田埂生長(zhǎng)的雜草結(jié)實(shí)前及時(shí)清除,防止雜草種子擴(kuò)散入玉米田危害。選用耐密玉米品種,采取精量播種、一播全苗的措施,保證春玉米每畝播種密度達(dá)到4200株以上,夏玉米每畝播種密度達(dá)到4500株以上,抑制雜草發(fā)生和生長(zhǎng)。采取玉米間作套種大豆、花生、綠豆等作物,減少伴生雜草發(fā)生。強(qiáng)化肥水管理,提高玉米對(duì)雜草的競(jìng)爭(zhēng)力。物理措施。在玉米苗期和中期,結(jié)合施肥,采取機(jī)械中耕培土,防除行間雜草。生態(tài)措施。利用粉碎的小麥、大豆等作物秸桿覆蓋,有效降低雜草出苗數(shù)。
 
  2.化學(xué)控草技術(shù)
 
  玉米田雜草因地域、播種季節(jié)和輪作方式的不同,采用的化除策略和除草劑品種有一定差異。經(jīng)測(cè)算,春玉米田以稗草—苘麻為混合優(yōu)勢(shì)雜草種群的防除指標(biāo)為10株/平方米,夏玉米田以馬唐—反枝莧為混合優(yōu)勢(shì)雜草種群的防除指標(biāo)為5株/平方米(以產(chǎn)量損失率5%計(jì)算)。
 
  (1)春玉米種植區(qū)
 
  北方一年一熟玉米種植區(qū),在播種季節(jié)土壤墑情較好的地塊,雜草防控采用“一封一殺”策略;在土壤墑情差、降雨少、沙性土壤的地塊,雜草防控采用“一殺一補(bǔ)”策略。播后苗前,選用乙草胺、精異丙甲草胺、異丙草胺、唑嘧磺草胺、噻吩磺隆、2,4-滴異辛酯、噻酮·異噁唑等藥劑及其復(fù)配制劑進(jìn)行土壤封閉處理。在玉米3—5葉期,雜草2—6葉期,選用煙嘧磺隆、苯唑草酮等藥劑及其復(fù)配制劑莖葉噴霧防治稗草、馬唐、野黍等禾本科雜草,選用氯氟吡氧乙酸、硝磺草酮、辛酰溴苯腈、莠去津等藥劑及其復(fù)配制劑莖葉噴霧防治鴨跖草、反枝莧、苘麻等闊葉雜草。莖葉噴霧時(shí)須在藥液中添加甲酯化植物油類助劑。
 
  (2)夏玉米種植區(qū)
 
  黃淮海、南方玉米種植區(qū),玉米在小麥(油菜)收獲后貼茬免耕種植,雜草防控采用“一蓋一殺”“一封一殺”策略。小麥(油菜)收獲后,采取秸稈田間粉碎覆蓋,免耕播種夏玉米。無秸稈覆蓋的田塊播后苗前,選用乙草胺(精異丙甲草胺、異丙草胺)+莠去津(唑嘧磺草胺、特丁津)桶混進(jìn)行土壤封閉處理。在玉米3—5葉期,雜草2—6葉期,選用煙嘧磺隆、苯唑氟草酮、苯唑草酮等藥劑及其復(fù)配制劑防治稗草、馬唐、牛筋草等禾本科雜草,選用氯氟吡氧乙酸、辛酰溴苯腈、莠去津、硝磺草酮等藥劑及其復(fù)配制劑進(jìn)行防治反枝莧、馬齒莧、田旋花等闊葉雜草。
 
  此外,在生物育種品種批準(zhǔn)種植區(qū)域,選用農(nóng)業(yè)農(nóng)村部審定的轉(zhuǎn)基因耐除草劑玉米品種和登記使用或政府推薦使用的除草劑品種,在玉米4—6葉期(大喇叭口期慎用),待雜草出多、出齊后,在2級(jí)風(fēng)以下的天氣莖葉噴施草甘膦防除雜草。如果需要二次施藥,初次與二次噴施之間,至少間隔15天以上,第二茬草出苗后噴施。
 
  (三)馬鈴薯田雜草防控方案
 
  馬鈴薯田雜草常年發(fā)生面積0.29億畝以上。根據(jù)馬鈴薯種植模式、雜草種類與分布特點(diǎn),開展分類指導(dǎo)。重點(diǎn)防控重點(diǎn)防控“兩草兩菜”(馬唐、稗草、反枝莧、牛繁縷)等惡性雜草。
 
  1.非化學(xué)控草技術(shù)
 
  農(nóng)業(yè)措施。及時(shí)清除田邊、路旁的雜草,防止雜草侵入農(nóng)田。采取馬鈴薯與禾本科、豆科、十字花科等作物輪作,行間套種大豆、花生等措施,減少伴生雜草發(fā)生。物理措施。在馬鈴薯苗期和生長(zhǎng)中期,結(jié)合施肥,采取機(jī)械中耕培土,防除行間雜草。在北方一年一熟區(qū)可選用無色生物降解地膜、黑白相間膜、黑色地膜進(jìn)行覆蓋除草。
 
  2.化學(xué)控草技術(shù)
 
  馬鈴薯田雜草因地域、播種季節(jié)和輪作方式的不同,采用的化除策略和除草劑品種有一定差異。
 
  (1)北方馬鈴薯種植區(qū)
 
  北方一年一熟馬鈴薯種植區(qū),雜草防控采用“一封一蓋(一補(bǔ))”策略。覆膜馬鈴薯田,采用土壤封閉處理加薄膜覆蓋防除雜草,播前3—7天,選用二甲戊靈、乙草胺、精異丙甲草胺等藥劑及其復(fù)配制劑進(jìn)行土壤封閉處理,處理后薄膜覆蓋防除雜草。覆膜馬鈴薯出苗后,根據(jù)田間雜草發(fā)生情況,在行間補(bǔ)施莖葉處理除草劑,選用精喹禾靈、烯草酮、高效氟吡甲禾靈等藥劑及其復(fù)配制劑防治馬唐、稗草等禾本科雜草,選用砜嘧磺隆、嗪草酮、滅草松等藥劑及其復(fù)配制劑定向行間噴霧防治反枝莧、馬齒莧、牛繁縷等闊葉雜草。
 
  (2)南方馬鈴薯種植區(qū)
 
  南方一年二至三熟馬鈴薯種植區(qū),雜草防控采用“一封一蓋”“一封一殺”策略。前茬為水稻的馬鈴薯田,播后苗前,選用二甲戊靈、乙草胺、精異丙甲草胺等藥劑及其復(fù)配制劑進(jìn)行土壤封閉處理,施藥后采用稻草均勻覆蓋防除雜草。前茬為蔬菜或其他作物的馬鈴薯田,播后苗前進(jìn)行土壤封閉處理,藥劑選擇同上。苗后根據(jù)田間雜草發(fā)生情況,雜草2—4葉期,選用精喹禾靈、烯草酮、高效氟吡甲禾靈等藥劑及其復(fù)配制劑防治馬唐、稗草等禾本科雜草,選用砜嘧磺隆、滅草松等藥劑及其復(fù)配制劑行間定向噴霧防治反枝莧、牛繁縷等闊葉雜草。
 
  四、注意事項(xiàng)
 
  (一)適時(shí)用藥。土壤封閉除草要在作物移栽前或播后苗前施藥,莖葉處理除草宜在雜草2—5葉期進(jìn)行。施藥時(shí)間選擇在上午10點(diǎn)之前和下午4點(diǎn)以后、晴天無風(fēng)時(shí)用藥,陰雨天、大風(fēng)天禁止用藥,以防藥效降低及霧滴飄移產(chǎn)生藥害。
 
  (二)科學(xué)用藥。莠去津?qū)儆陂L(zhǎng)殘留除草劑,使用量應(yīng)控制在每畝38克(按有效成分量計(jì)算)以下;使用過莠去津的玉米田,要謹(jǐn)慎選擇下茬作物,以防產(chǎn)生藥害。
 
  (三)輪換用藥。要根據(jù)田間草相,合理選擇對(duì)路除草劑,避免長(zhǎng)期單一使用同一作用機(jī)理的除草劑品種,交替輪換用藥,以延緩抗藥性的產(chǎn)生和發(fā)展。
 
  (四)精準(zhǔn)施藥。選用性能良好的施藥器械,必須使用扇形噴頭。推薦使用懸掛式、自走式噴桿噴霧機(jī),避免因施藥器械“跑、冒、滴、漏”造成藥液浪費(fèi)和局部藥害。嚴(yán)禁使用植保無人飛機(jī)噴施草甘膦,以防造成大面積藥害。根據(jù)所用施藥器械類型合理設(shè)置兌水量,確保噴霧均勻、不重噴、不漏噴。噴施土壤封閉除草劑時(shí)用水量要適當(dāng)加大,每畝用水量30—40公斤為宜。
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