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全國農(nóng)技中心印發(fā)《玉米水肥一體化單產(chǎn)提升技術(shù)方案》

2024-05-24 08:35:38 來源:全國農(nóng)業(yè)技術(shù)推廣服務中心 閱讀量:15779 評論

導讀:水肥一體化技術(shù),通過向作物根區(qū)適時適量、集中高效供應水分和養(yǎng)分,能夠及時有效滿足作物水肥需求

  【農(nóng)機網(wǎng) 科技創(chuàng)新】 水肥一體化技術(shù),通過向作物根區(qū)適時適量、集中高效供應水分和養(yǎng)分,能夠及時有效滿足作物水肥需求,是實現(xiàn)玉米密植和水肥精準調(diào)控,支撐玉米單產(chǎn)提升的關(guān)鍵舉措。為推進玉米大面積單產(chǎn)提升,服務新一輪千億斤糧食產(chǎn)能提升工程,全國農(nóng)技中心特制定本方案。
 
適宜區(qū)域及技術(shù)效果
 
  適宜有水源條件的玉米產(chǎn)區(qū),主要包括東北及長城沿線春玉米、西北內(nèi)陸灌區(qū)和沿黃灌區(qū)春玉米、華北黃淮和汾渭平原夏玉米和西南部分補充灌溉玉米種植區(qū)等。主要采用地面滴灌、淺埋滴灌或深埋滲灌等方式精準灌水和施肥,播后及時滴水出苗確保苗全苗齊,全程按需分次均衡灌水施肥,氮鉀后移、磷肥基追搭配、中微量元素因需補需實現(xiàn)精準供應,確保后期不脫肥,支撐高密度群體。同時配套科學選種、化控防倒和病蟲草害防控等措施。實現(xiàn)水肥效率和玉米產(chǎn)能雙提升目標,與當?shù)爻R?guī)模式相比,支撐密度增加10%-30%,單產(chǎn)和水分生產(chǎn)力提高10%以上。
 
不同區(qū)域技術(shù)要點
 
  (一)東北及長城沿線春玉米。主要包括東北中西部、內(nèi)蒙古東部和中部、華北北部和黃土高原等區(qū)域春玉米,具有噴滴灌設施條件的半干旱半濕潤區(qū)域,適宜采用淺埋滴灌、膜下滴灌、深埋滲灌等技術(shù)。
 
  1. 整地及播種。一是精細整地。整地要掌握好“平、碎、勻”要點,土壤翻耕或旋耕后耙地,做到耕層上虛下實,地面平整、無明顯土塊。二是適時播種。耕層5厘米處地溫穩(wěn)定超過10-12℃時適墑播種,覆膜地塊可適當提前。三是科學播種。播種前,可對種子二次包衣或拌種,用含磷鋅液體肥浸種增加種子營養(yǎng),促進生根。選用帶有導航功能機械和精量播種機播種,速度均勻慢速,單粒精播,播深3-6厘米。大小行播種時,大行距一般70-80厘米,小行距一般30-40厘米。四是合理增密。選擇經(jīng)國家或省級審定,在當?shù)匾逊N植并表現(xiàn)優(yōu)良的耐旱、耐密、抗病、高產(chǎn)、宜機收品種。適度增加播種密度,與傳統(tǒng)種植模式相比,因地制宜增密15%-30%。
 
  2. 水肥一體化系統(tǒng)。主要有水源、首部樞紐、輸配水管網(wǎng)和滴灌帶(管)組成。滴灌設備的規(guī)格和型號根據(jù)生產(chǎn)實際進行選擇,滴灌灌水器出水量一般在1.0升/小時-2.5升/小時之間。首部樞紐包括加壓、過濾和灌溉施肥智能決策等設施設備。積溫不足、蒸發(fā)量大的區(qū)域,宜采用膜下滴灌;東北西部和內(nèi)蒙古東部等地宜采用淺埋滴灌。
 
  3. 灌溉施肥策略。底肥建議施用玉米配方肥20-25公斤/畝,施肥時肥料離種子側(cè)5厘米,深7-10厘米,推薦選用具有保水、生根等作用的新型肥料。膜下滴灌玉米全生育期灌水5-8次,每次灌水量10-25m³/畝,灌溉定額每畝約100-150m³,淺埋滴灌單次灌水量較膜下滴灌高3-5m³/畝左右。玉米播種后即滴灌出苗水,同時隨水滴施大量元素水溶肥(高磷中氮低鉀型)或磷酸一銨3-5公斤/畝,利于出苗快而齊。拔節(jié)至抽雄前分2次隨水滴施高氮大量元素水溶肥5-8公斤/畝。抽雄期滴施平衡型大量元素肥料5-8公斤/畝。灌漿期至乳熟期,追施高氮大量元素水溶肥5-7公斤/畝。全生育期施氮(N)13-20公斤/畝、磷(P2O5)6-10公斤/畝、鉀(K2O)4-10公斤/畝。
 
  4. 控旺防倒防病。高密度種植條件下玉米群體大、倒伏風險高,在6-8展葉期噴施玉米控旺劑,控制穗位高度、增粗基部莖節(jié),提高玉米抗倒伏能力。播后苗前和苗后及時噴施除草劑防除雜草,孕穗期盯防玉米螟和中后期莖腐病及葉斑類病害。
 
  (二)西北內(nèi)陸灌區(qū)和沿黃灌區(qū)春玉米。主要包括新疆、河西走廊等內(nèi)陸灌區(qū)以及甘肅、寧夏和內(nèi)蒙古等沿黃灌區(qū),是降水量少、蒸發(fā)量較大的干旱半干旱地區(qū),適宜推廣玉米膜下滴灌水肥一體化技術(shù);沿黃灌區(qū),宜在此基礎上推廣黃河水直濾滴灌技術(shù),破解黃河水泥沙過濾難題。
 
  1. 選配品種及科學播種。針對灌區(qū)氣候特點、栽培管理水平等實際情況,選擇耐密性好、穗位低、抗倒伏能力強,適合當?shù)氐母弋a(chǎn)優(yōu)質(zhì)多抗品種。播前種子包衣,包衣劑可用含有黏結(jié)劑的殺蟲劑、殺菌劑、復合肥料、微量元素、植物生長調(diào)節(jié)劑等配合制劑,提高玉米抗逆性。播種深度一般4-6厘米,若土壤墑情不足,可適當深播,播后蓋土,減少土壤水分蒸發(fā)。大小行播種時,大行距一般70-80厘米,小行距一般30-40厘米。合理增加播種密度,河西灌區(qū)、河套灌區(qū)等高產(chǎn)地塊播種量一般可增加到6500-7000株/畝左右,具體畝株數(shù)因品種而異。
 
  2. 機械覆膜鋪管一體。建議采用具有北斗導航功能的播種機械,一次性完成施肥、播種、鋪管、鋪膜、壓膜、覆土等作業(yè),滴灌帶間距90-120厘米,1條滴灌帶控制灌溉2行玉米,大小行播種時滴灌管布置在窄行中間。播后苗前封閉除草,減少雜草發(fā)生。膜下滴灌建議使用寬幅70厘米、厚度0.01毫米的生物降解地膜覆蓋地面(具體型號因種植模式而異),地膜壓嚴壓實,膜上每2米處覆土,以防跑墑及大風刮破地膜。
 
  3. 灌溉施肥策略。玉米全生育期一般灌水8-12次,灌水定額每畝約145-320m³。播種后即灌水1次滴水出苗,灌水量15-30m³/畝。有條件地區(qū)在秋翻地時施用腐熟有機肥2-3噸/畝,底肥建議施用玉米配方肥20-30公斤/畝,推薦選用具有保水、生根等作用的新型肥料;強化玉米中后期水肥供給,分別于拔節(jié)期追肥1次、拔節(jié)-大喇叭口期追肥1次、大喇叭口-吐絲期追肥2-3次高氮型水溶肥,吐絲-灌漿中期追肥2-3次中氮高鉀型水溶肥料,全生育期追肥6-8次,共追施氮(N)13-20公斤/畝、磷(P2O5)6-10公斤/畝、鉀(K2O)4-10公斤/畝,追肥選用水溶性肥料,施肥量也可根據(jù)土壤地力、目標產(chǎn)量等情況適當調(diào)整。黃河流域河套灌區(qū)因黃河水泥沙含量大,低成本、高效率過濾泥沙,是水肥一體化技術(shù)大面積推廣的關(guān)鍵。建議采用黃河水直濾技術(shù),實現(xiàn)快速高效低成本過濾,達到滴灌要求。
 
  4. 控旺防倒防病。膜下滴灌玉米田間小氣候較為干燥,應加強葉螨的綜合防治,并重點注意玉米螟、黏蟲、草地螟的防治。在玉米拔節(jié)初期噴施控旺劑,控制穗位高度、增粗基部莖節(jié),提高玉米抗倒伏能力。
 
  (三)華北黃淮和汾渭平原夏玉米。主要包括河北、河南、山東、江蘇和安徽淮河以北地區(qū)、陜西關(guān)中和山西汾河谷地,小麥-玉米輪作為主,適宜采用地面滴灌、淺埋滴灌、深埋滲灌、地埋可伸縮噴灌、行走式噴灌機等方式實現(xiàn)水肥一體化。
 
  1. 品種選擇及處理。選擇緊湊耐密、抗病、抗倒、宜機收、經(jīng)過包衣處理的中晚熟夏玉米品種。若沒有包衣處理,可根據(jù)種植區(qū)域常發(fā)病蟲害進行拌種或種衣劑包衣。如選擇5.4%吡蟲啉·戊唑醇等高效低毒種衣劑包衣,控制苗期灰飛虱、蚜蟲、絲黑穗病等;用辛硫磷等藥劑拌種,防治地老虎、金針蟲、蠐螬等地下害蟲。
 
  2. 單粒精播合理密植。貼茬直播,宜采用等行距機械播種,行距一般60-65厘米;滅茬直播,可采用等行距或大小行機械播種。大小行播種時,大行距一般70-80厘米,小行距一般30-40厘米。播種深度為3-5厘米。根據(jù)品種耐密性合理增加密度,一般緊湊型品種畝留苗密度5500-6000株,半緊湊型品種畝留苗密度5000-5500株。
 
  3. 水肥一體化管道鋪設。冬小麥夏玉米一年兩熟的淺埋滴灌田,在小麥播種時使用帶有淺埋鋪設滴灌帶(管)功能的播種機,黏土或壤土埋深2-3厘米左右,沙壤土埋深4-5厘米。滴灌帶(管)鋪設長度根據(jù)滴灌帶(管)規(guī)格和生產(chǎn)實際設定。玉米在滴灌帶(管)中間預留的玉米行播種。上茬無滴灌帶(管)的夏玉米田,前茬如有秸稈需先進行秸稈粉碎或清理,再進行夏玉米播種鋪管作業(yè)。地埋滲灌水肥一體化管道需在小麥播種前施工鋪設。
 
  4. 灌溉施肥策略。該區(qū)域玉米生長正值雨熱同期,可結(jié)合降水情況進行測墑補灌。播種后0-20厘米土壤相對含水量小于65%時,滴灌出苗水15m³/畝左右;拔節(jié)期0-40厘米土壤相對含水量小于70%時灌水15-20m³/畝;大喇叭口至灌漿期0-40厘米土壤相對含水量小于75%時灌水20-25m³/畝??傪B(yǎng)分施用量建議為氮(N)15-18公斤/畝,磷(P2O5)6-8公斤/畝,鉀(K2O)8-10公斤/畝,其中70%-80%的氮肥及40%鉀肥分3-4次在拔節(jié)至灌漿期隨水追施。石灰性土壤或缺鋅地塊底施或水肥一體化追施一水硫酸鋅2公斤/畝。
 
  5. 其他配套措施。一是雜草防除“封定結(jié)合”,采用播后芽前封閉與苗后莖葉定向噴藥相結(jié)合的方法防除雜草。優(yōu)先選擇播后芽前封閉除草,減輕苗后除草壓力。二是控旺防倒伏。玉米前期控制氮肥施用量,避免植株徒長;在6-8展葉期科學噴施控旺劑,縮短節(jié)間,增強抗倒伏能力。三是適時晚收,待籽粒乳線基本消失、基部黑層出現(xiàn)后機械收獲。
 
重點任務
 
  (一)強化技術(shù)集成。參考不同區(qū)域玉米水肥一體化技術(shù)模式要點,開展技術(shù)應用調(diào)研和模式集成創(chuàng)新。圍繞不同灌溉方式、灌水量、施肥量等進行對比,優(yōu)化技術(shù)參數(shù),配套品種、栽培等措施,集成屬地化的玉米水肥一體化技術(shù)模式,熟化形成技術(shù)規(guī)程,提高針對性和實用性,實現(xiàn)水肥效率和玉米單產(chǎn)雙提升目標。
 
  (二)開展示范建設。在具備灌溉條件的區(qū)域,大力推廣應用玉米水肥一體化技術(shù),將高效節(jié)水灌溉設備優(yōu)勢轉(zhuǎn)化為糧食產(chǎn)能優(yōu)勢。結(jié)合綠色高產(chǎn)高效節(jié)水增糧推進縣、玉米單產(chǎn)提升工程等工作,集中連片開展玉米水肥一體化提單產(chǎn)創(chuàng)高產(chǎn)集成示范。
 
  (三)做實指導培訓。將水肥一體化技術(shù)作為玉米提單產(chǎn)的關(guān)鍵技術(shù),動員各級農(nóng)技推廣人員、科研院校專家、社會化服務組織等深入田間,開展技術(shù)指導,幫助農(nóng)民解決生產(chǎn)問題。線上線下多形式舉辦技術(shù)培訓,講解關(guān)鍵要點,提高農(nóng)民高效節(jié)水灌溉和科學水肥管理技能。
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