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山東省印發(fā)2024年全省玉米大面積單產(chǎn)提升技術(shù)指導(dǎo)意見

2024-05-29 08:40:08 來源:山東省農(nóng)業(yè)農(nóng)村廳 閱讀量:16262 評論

導(dǎo)讀:全面提高播種質(zhì)量是實現(xiàn)玉米高產(chǎn)穩(wěn)產(chǎn)的基礎(chǔ)。小麥留茬過高、墑情不足、播種密度不合理等都會影響玉米播種質(zhì)量。

  【農(nóng)機網(wǎng) 通知公告】 
 
關(guān)于印發(fā)2024年全省玉米大面積單產(chǎn)提升技術(shù)指導(dǎo)意見的通知
 
魯農(nóng)技字〔2024〕17號
 
  各市農(nóng)業(yè)農(nóng)村局:
 
  為指導(dǎo)各地抓好玉米生產(chǎn)各環(huán)節(jié)關(guān)鍵技術(shù)措施落實,深入挖掘玉米單產(chǎn)潛力,促進大面積單產(chǎn)提升,我廳制定了《2024年全省玉米大面積單產(chǎn)提升技術(shù)指導(dǎo)意見》,現(xiàn)印發(fā)給你們,請結(jié)合當(dāng)?shù)貙嶋H,參照執(zhí)行。
 
  山東省農(nóng)業(yè)農(nóng)村廳
 
  2024年5月25日
 
2024年全省玉米大面積單產(chǎn)提升技術(shù)指導(dǎo)意見
 
  為深入挖掘玉米單產(chǎn)潛力,推動全省玉米實現(xiàn)大面積單產(chǎn)提升,特制定本意見。
 
  一、提高播種質(zhì)量,夯實高產(chǎn)基礎(chǔ)
 
  全面提高播種質(zhì)量是實現(xiàn)玉米高產(chǎn)穩(wěn)產(chǎn)的基礎(chǔ)。小麥留茬過高、墑情不足、播種密度不合理等都會影響玉米播種質(zhì)量,要重點抓好種子優(yōu)選包衣、適期搶播、合理密植、防蟲除草等技術(shù)措施,確保苗全、苗齊、苗勻、苗壯。
 
  (一)種子優(yōu)選包衣。種子質(zhì)量是提高玉米出苗質(zhì)量的基礎(chǔ),所選良種應(yīng)符合純度≥98%、發(fā)芽率≥95%、凈度≥98%、含水量≤13%標(biāo)準(zhǔn)。應(yīng)結(jié)合當(dāng)?shù)厣a(chǎn)實際,科學(xué)選用高產(chǎn)穩(wěn)產(chǎn)、耐密抗倒、多抗廣適、適宜機收的品種。魯南、魯西南地區(qū)小麥?zhǔn)斋@較早,光溫充足,可以選用產(chǎn)量潛力大、生育期較長的品種;魯中、魯西北地區(qū)可選用生育期適中,高產(chǎn)穩(wěn)產(chǎn)的品種;魯東地區(qū)可選用生育期略短、穩(wěn)產(chǎn)的品種。籽粒機收地塊宜選擇生育期較短、穗位適中、抗倒伏、籽粒前期灌漿快、后期脫水快的品種。采用玉米密植精準(zhǔn)調(diào)控高產(chǎn)技術(shù)的地塊,應(yīng)特別注重選用耐密抗倒高產(chǎn)品種。玉米商品種大多進行了包衣,但包衣劑質(zhì)量難以保證,應(yīng)根據(jù)當(dāng)?shù)亟昝缙谥饕∠x害發(fā)生情況,科學(xué)選擇高質(zhì)量種衣劑進行種子二次包衣或拌種,確保有效預(yù)防苗期病蟲害。預(yù)防玉米莖基腐病、絲黑穗病等,可選用吡唑醚菌酯、戊唑醇、精甲霜靈、咯菌腈、苯醚甲環(huán)唑等;防治灰飛虱、薊馬、地下害蟲等,可選用噻蟲嗪、吡蟲啉、氯氰菊酯、氟蟲腈或呋蟲胺等;可復(fù)配殺蟲殺菌藥劑,包衣防治蚜蟲、灰飛虱、地下害蟲、莖基腐病等。藥劑用量應(yīng)嚴(yán)格按照登記用量或用藥說明施用。
 
  (二)規(guī)范適墑播種。玉米生產(chǎn)“七分種,三分管”,提高播種質(zhì)量是關(guān)鍵。貼茬直播是我省玉米的主要播種方式,應(yīng)抓好小麥?zhǔn)斋@與玉米播種的銜接,小麥?zhǔn)斋@時應(yīng)提高秸稈還田質(zhì)量,留茬高度≤20厘米,秸稈切碎長度≤10厘米并拋灑均勻。玉米播種應(yīng)采取單粒精播,宜選用多功能、高精度、氣力式或指夾式、種肥同播的高性能復(fù)式播種機加裝北斗導(dǎo)航精量播種。等行距播種的,玉米行距為60厘米;寬窄行播種的,寬行70~80厘米,窄行40~50厘米。播種時應(yīng)按照播種技術(shù)要求調(diào)試好播種機械,先進行試播,達到要求后再進行大規(guī)模播種。要將播種機運行速度控制在5~7公里/小時,播深3~5厘米,做到播深、行距、覆土、鎮(zhèn)壓一致,防止漏播、重播或鎮(zhèn)壓輪打滑。我省玉米播種期常年降水較少,近年因干旱影響玉米適期播種和出苗現(xiàn)象時有發(fā)生。各地應(yīng)密切關(guān)注天氣預(yù)報,及早組織水源,確保在無有效降雨的情況下,有保苗水可用。播種后,灌溉水充足的建議澆“蒙頭水”,灌溉水有限的澆保苗水,確保玉米順利出苗。采用玉米密植精準(zhǔn)調(diào)控高產(chǎn)技術(shù)的地塊,玉米單產(chǎn)提升工程縣和單產(chǎn)提升整建制推進縣宜采用滴灌節(jié)水方式確保播后滴水齊苗。同時也要注意極端強降雨,若小麥?zhǔn)斋@期遭遇強降雨,應(yīng)在播種機械具備進地條件后,收獲小麥后立即播種;播后苗前遭遇強降雨的,立即排水,防止因漬澇導(dǎo)致種子腐爛。
 
  (三)合理密植施肥。提高玉米單產(chǎn)的關(guān)鍵措施是合理增加播種密度。播種密度應(yīng)比預(yù)定收獲密度增加10%左右,未采用玉米密植精準(zhǔn)調(diào)控高產(chǎn)技術(shù)的地塊,耐密型玉米品種一般大田每畝播種5000粒左右,示范田5500粒左右,攻關(guān)田5800~6000粒;大穗型品種一般大田每畝播種4600粒左右,高產(chǎn)田5300粒左右;配合施用配方肥或緩控釋肥,肥料控釋時間60~70天,控氮比30%左右,可選用N:P2O5:K2O配比為28-6-12或26-8-8等相近配方的肥料,普通地塊推薦用量40~45公斤,高產(chǎn)地塊每畝推薦用量45~55公斤,播種行外帶狀側(cè)深施8~10厘米,防止燒種和燒苗,同時添加鋅肥。采用玉米密植精準(zhǔn)調(diào)控高產(chǎn)技術(shù)的地塊,播種密度應(yīng)根據(jù)管理水平在原密度基礎(chǔ)上增加10%~20%。應(yīng)在小麥?zhǔn)斋@后立即免耕播種,采用寬窄行方式導(dǎo)航播種,寬行70~80厘米,窄行30~40厘米,行距偏差小于5厘米,滴灌帶鋪設(shè)在窄行內(nèi),種肥同播,種肥用量每畝純氮3~5公斤,P2O5 6~10公斤,K2O 6~8公斤。播后1~2天完成滴水齊苗,滴灌濕潤范圍超過播種行5厘米為宜。玉米單產(chǎn)提升工程縣和單產(chǎn)提升整建制推進縣有等條件的地區(qū)提倡推廣應(yīng)用密植精準(zhǔn)調(diào)控高產(chǎn)技術(shù)。
 
  二、加強田間管理,挖掘單產(chǎn)潛力
 
  培育健壯個體、構(gòu)建合理群體,確保穗足穗大、粒多粒重是玉米出苗后田間管理的主攻方向。應(yīng)綜合采取化學(xué)除草、合理化控、病蟲害綜合防治、精準(zhǔn)水肥管理、抗逆減災(zāi)等關(guān)鍵措施,深入挖掘單產(chǎn)潛力。
 
  (一)科學(xué)運籌水肥??茖W(xué)運籌水肥是形成健壯個體、合理群體、減少空桿、增加粒重、發(fā)揮品種高產(chǎn)潛力的重要保障。
 
  玉米苗期對肥料需求不多,施用緩控釋肥的地塊和施用速效種肥的高產(chǎn)地塊,在苗期一般不需要施肥。苗期適度干旱可以促進根系下扎,起到蹲苗的作用,形成壯苗,提高抗逆性。苗期對淹水和漬澇比較敏感,若出現(xiàn)積水或漬澇,應(yīng)立即排水。
 
  小喇叭口期到大喇叭口期是玉米需肥的關(guān)鍵時期,大喇叭口至抽雄期是玉米需水的臨界期,此期肥水供應(yīng)不足,容易造成植株細弱、群體整齊度差、生物量不足,導(dǎo)致雌雄穗發(fā)育異?;蚧ㄆ诓挥?。此期應(yīng)保證充足的水肥供應(yīng),土壤相對含水量不低于70%,墑情較差時應(yīng)進行灌溉;施用緩控釋肥的地塊如無缺肥癥狀可不追肥,只施用種肥和采用密植精準(zhǔn)調(diào)控高產(chǎn)技術(shù)的地塊則應(yīng)借水追肥或利用水肥一體化設(shè)備補充水肥,追肥以速效氮肥為主,占全生育期需氮量50%左右,機械追肥的應(yīng)側(cè)深施。
 
  灌漿期應(yīng)保持土壤相對含水量應(yīng)不低于60%,高產(chǎn)地塊追施總氮量20%左右,用作花粒肥,有條件的用無人機噴施1%~2%的磷酸二氫鉀和尿素,防止葉片早衰,延長灌漿持續(xù)期,增加粒重。
 
  采用玉米密植精準(zhǔn)調(diào)控高產(chǎn)技術(shù)的地塊,應(yīng)于化控后5~7天、大喇叭口期、吐絲授粉期、乳熟期分次進行滴灌沖肥,畝追施純氮11~13公斤。蠟熟期如天氣干旱,可再進行1次滴灌,以延長葉片功能期。
 
  (二)加強病蟲草害綠色防控。據(jù)有關(guān)部門預(yù)測,2024年全國玉米病蟲害預(yù)計總體偏重發(fā)生,黃淮地區(qū),草地貪夜蛾偏重發(fā)生,玉米螟、棉鈴蟲、桃蛀螟和甜菜夜蛾穗期混合發(fā)生,南方銹病重發(fā)態(tài)勢明顯,對玉米生產(chǎn)安全構(gòu)成較大威脅。應(yīng)堅持“預(yù)防為主、聯(lián)防聯(lián)控”的防控策略,綜合應(yīng)用抗性品種、生態(tài)調(diào)控、理化誘控、生物防治和科學(xué)用藥等措施,保障玉米生產(chǎn)安全。
 
  玉米播種后出苗前,土壤墑情較好的地塊可用乙草胺、異丙甲草胺、乙·莠懸浮劑等進行封閉除草;未進行封閉除草或效果較差的地塊,可在玉米3~5葉期,雜草2~4葉期用煙嘧磺隆、苯唑·莠等進行苗后莖葉噴霧除草。煙嘧磺隆除草地塊避免使用有機磷農(nóng)藥,以免產(chǎn)生藥害,同時注意噴灑均勻,不重噴、不漏噴,確保除草質(zhì)量并注意用藥安全。種子包衣或拌種的地塊,苗期一般常規(guī)病蟲害不會嚴(yán)重發(fā)生,但突發(fā)、偶發(fā)性病蟲害無法精準(zhǔn)預(yù)測,要加強預(yù)測預(yù)報,一旦發(fā)生,要趁早防治,切斷傳播路徑,降低損失。
 
  大喇叭口期至開花授粉期,應(yīng)實施“一防雙減”,通過組配殺蟲劑和殺菌劑,對病蟲害進行一次性防治,達到減少后期害蟲基數(shù)和減輕病害危害程度的目的。要提高飛防質(zhì)量,確保藥液能夠滲透到群體中下層。應(yīng)加強對南方銹病、蝸牛等偶發(fā)重發(fā)病蟲害的預(yù)報,提前做好預(yù)案,一旦發(fā)生重點防治。
 
  根腐病、絲黑穗病、紋枯病和莖腐病等土傳病害主要通過種子包衣預(yù)防。如遇強降雨,應(yīng)及時排出田間積水,努力減輕紋枯病和莖腐病的發(fā)生程度。紋枯病在發(fā)病初期(玉米拔節(jié)時),可噴施井岡霉素A等殺菌劑防治,并視發(fā)病情況隔7~10天再噴1次。南方銹病、大斑病、小斑病、褐斑病、彎孢葉斑病、白斑病、北方炭疽病等病害在發(fā)病初期,可選用枯草芽孢桿菌、井岡霉素A、苯醚甲環(huán)唑、氟環(huán)唑、吡唑醚菌酯、丙環(huán)·嘧菌酯、肟菌·戊唑醇、唑醚·氟環(huán)唑等殺菌劑防治,并視發(fā)病情況隔7~10天再噴1次。
 
  草地貪夜蛾、玉米螟、粘蟲、棉鈴蟲、桃蛀螟等成蟲發(fā)生期,可使用燈誘、食誘、性誘劑等進行誘殺;產(chǎn)卵初期釋放赤眼蜂或夜蛾黑卵蜂等天敵滅卵;幼蟲低齡階段可選用蘇云金桿菌、球孢白僵菌、核型多角體病毒、金龜子綠僵菌、印楝素、短穩(wěn)桿菌等生物農(nóng)藥防治;化學(xué)防治可選用四氯蟲酰胺、氯蟲苯甲酰胺、甲氨基阿維菌素苯甲酸鹽、乙基多殺菌素、四唑蟲酰胺等殺蟲劑,抓住低齡幼蟲窗口期實施統(tǒng)防統(tǒng)治和聯(lián)防聯(lián)控。
 
  (三)強化防災(zāi)減災(zāi)。玉米生育期正是遭遇干旱、高溫、強降雨、陰雨寡照、強風(fēng)等氣象災(zāi)害的高發(fā)期。應(yīng)及早謀劃,科學(xué)制定預(yù)案,寧可十防九空,不可失防萬一。
 
  強降雨。強降雨容易造成田間漬澇。如出現(xiàn)農(nóng)田積水,應(yīng)抓緊組織排澇,土壤濕度飽和形成漬澇的地塊要及時開挖瀝水溝,盡量在2天內(nèi)排除積水,降低植株漬害程度。漬澇解除后應(yīng)及時進行中耕松土,加快土壤水分散失,促進根系恢復(fù)生長。強降雨容易造成土壤養(yǎng)分淋失,降雨排澇后應(yīng)及時補充速效氮肥,也可適當(dāng)噴施葉面肥,促進玉米及時恢復(fù)生長,減少對產(chǎn)量的影響。
 
  大風(fēng)。強降雨往往伴隨強風(fēng),容易造成玉米植株倒伏。要根據(jù)倒伏時期和倒伏程度,因地因情施策。玉米小喇叭口期前遭遇大風(fēng),出現(xiàn)倒伏,可不采取措施,靠植株自我調(diào)節(jié)進行恢復(fù)。小喇叭口期后遭遇大風(fēng)而出現(xiàn)的根部倒伏,應(yīng)及時扶正,并淺培土,以促根下扎,增強抗倒伏能力,恢復(fù)葉片自然分布狀態(tài),降低產(chǎn)量損失。對于開花后穗上部莖折的地塊,要及時割除莖折部分,改善玉米田通風(fēng)透光條件,提高灌漿強度;對于穗下部莖折嚴(yán)重的地塊,可及早收獲,作為青貯飼料。
 
  干旱。玉米不同生育期,抗旱能力不同,若出現(xiàn)嚴(yán)重干旱,均應(yīng)及時灌溉。玉米苗期抗旱能力較強,適當(dāng)干旱可以起到蹲苗的效果,促進根系下扎和基部節(jié)間粗壯,提高植株抗倒能力。大喇叭口到抽雄期如遇旱會造成“卡脖旱”,導(dǎo)致雌雄穗發(fā)育不同步,嚴(yán)重影響授粉,應(yīng)及時灌水。因干旱造成植株生育遲緩的,應(yīng)隨水適當(dāng)補充速效氮肥。
 
  高溫?zé)岷完幱旯颜?。玉米開花授粉及灌漿階段如遭遇高溫?zé)岷Γ菀子绊懟ǚ刍盍?,造成結(jié)實性差、花粒、禿尖等現(xiàn)象,影響玉米產(chǎn)量。高溫發(fā)生前,可適當(dāng)灌水,增加田間濕度,降低冠層溫度,并采用無人機低空飛行,增加擾動輔助授粉。開花授粉及灌漿階段如遭遇陰雨寡照,應(yīng)及時噴施葉面肥,提高光合能力,增加有機物質(zhì)運轉(zhuǎn)。
 
  倒伏。種植密度增大,可能增加倒伏的風(fēng)險。高產(chǎn)田尤其要注意合理化控。群體較大、水肥充足、存在旺長風(fēng)險的夏玉米可在6~10片展開葉期間進行化控,最佳化控時間為7~9片展開葉期,可選擇矮壯素、乙烯利、胺鮮酯、胺鮮酯·乙烯利、胺鮮酯·甲哌鎓等化控劑,于晴朗無風(fēng)的早晨或下午4點以后采用無人機或噴桿噴霧機均勻噴施玉米上部葉片。
 
  采用玉米密植精準(zhǔn)調(diào)控高產(chǎn)技術(shù)的地塊,要在6~8片葉展開期進行化控,若因天氣原因未適時化控或化控效果不理想,二次化控不應(yīng)晚于11葉展開期進行。應(yīng)噴施均勻,不重噴不漏噴。藥液要隨用隨配,濃度應(yīng)遵照產(chǎn)品說明書使用,一般不與其他農(nóng)藥和化肥混合使用。
 
  三、適期減損收獲,實現(xiàn)顆粒歸倉
 
  應(yīng)堅持增收和減損兩端發(fā)力,抓好玉米適期晚收和機收減損工作,實現(xiàn)顆粒歸倉、豐收到手。
 
  (一)適期收獲。適期收獲可增加粒重、減少損失、提高玉米產(chǎn)量與品質(zhì)。玉米成熟的標(biāo)志是植株的中、下部葉片變黃,基部葉片干枯,苞葉干枯呈黃白色而松散,籽粒脫水變硬乳線消失,微干縮凹陷,籽?;?胚下端)出現(xiàn)黑帽層,并呈現(xiàn)出品種固有的色澤。普通地塊應(yīng)在10月1日-5日收獲,高產(chǎn)地塊和玉米單產(chǎn)提升整建制推進縣應(yīng)在10月10日-15日收獲。
 
  (二)機收減損。要強化機手培訓(xùn),提高裝備調(diào)試水平,提高收獲效率和減少收獲損失。適期收獲應(yīng)大面積連片推進、整村整鎮(zhèn)推進、農(nóng)機農(nóng)藝聯(lián)合推進,提高收獲效率。同時還要提升應(yīng)急收獲能力,針對可能發(fā)生的強降雨、大風(fēng)導(dǎo)致農(nóng)田積水、作物因災(zāi)倒伏、機具供給局部緊張等緊急情況,制定農(nóng)機防災(zāi)救災(zāi)應(yīng)急預(yù)案,協(xié)調(diào)收獲機械和就近匹配烘干用機需求,保障已收糧食安全入倉,減少產(chǎn)后損失。
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