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關于印發(fā)《早稻育插秧機械化技術指導意見》的通知
2022-03-22
08:48:32
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導讀:當前正值我國南方雙季稻區(qū)早稻播種育秧季節(jié),為提高早稻生產(chǎn)機械化水平,特提出早稻育插秧機械化技術指導意見,供各地參考。
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農(nóng)業(yè)農(nóng)村部農(nóng)業(yè)機械化總站
2022年3月14日
早稻育插秧機械化技術指導意見
農(nóng)業(yè)農(nóng)村部農(nóng)業(yè)機械化總站
農(nóng)業(yè)農(nóng)村部農(nóng)作物生產(chǎn)全程機械化專家指導組
當前正值我國南方雙季稻區(qū)早稻播種育秧季節(jié),為提高早稻生產(chǎn)機械化水平,特提出早稻育插秧機械化技術指導意見,供各地參考。
一、耕整地
由于雙季稻區(qū)茬口緊,應及時耕整地,并留出足夠的沉實時間。冬閑田應在上茬作物收獲后及時耕翻曬垡,有條件的地區(qū)應實行冬翻田。耕整地宜采用旱耕或濕潤旋耕方式,秸稈宜還田,犁耕深度15—18cm,旋耕深度10—15cm,實現(xiàn)秸稈還田、埋茬覆蓋。翻耕或旋耕時,可施用有機肥及其它基肥,使肥料翻埋入土,與土層混合。應采用水田耙或平地
打漿機平整田面,沉實后達到機插作業(yè)要求。
耕整地宜采用橡膠履帶式農(nóng)業(yè)機械,禁止90及以上馬力輪式
拖拉機開展水田機械化作業(yè),減少接地比壓,減少水田犁底層的破壞。
耕整地作業(yè)質(zhì)量應達到“平整、潔凈、細碎、沉實”。作業(yè)后,田塊應平整,深度一致,地表高低落差≤3cm;田面應潔凈,無殘茬、雜草等雜物;土層應下碎上糊,上爛下實;泥漿應沉實達到泥水分清,寸水不露泥,沉實而不板結,機械作業(yè)時不陷機、不壅泥。
二、播種育秧
(一)品種選擇
根據(jù)當?shù)貧夂驐l件、種植制度、栽插季節(jié)、生產(chǎn)模式等選擇生育期適宜、優(yōu)質(zhì)、高產(chǎn)、抗逆、適應性好、發(fā)芽率和分蘗力較強、適于機插的當?shù)刂魍破贩N,并應通過品種審定;應統(tǒng)籌考慮早稻與晚稻品種生育期,合理搭配,確保安全抽穗,實現(xiàn)雙季機插高產(chǎn)。
(二)育秧方式
培育適齡壯秧是早稻穩(wěn)產(chǎn)高產(chǎn)的基礎。應選擇適宜的機插育秧模式,宜采用集中育秧方式,全面提高秧苗素質(zhì)和育秧效率。集中育秧應科學布局,經(jīng)濟適用,規(guī)模適度,便于統(tǒng)一管理和方便取秧、運秧;應做好集中催芽、精量播種、暗化出苗、苗期保溫保濕和水肥藥管理,降低早稻育秧風險,提供高素質(zhì)壯秧;特別注意預防低溫冷害,防止爛秧。有條件的地區(qū)宜采用大棚旱育秧或工廠化育秧,也可采用大田旱育秧或田間泥漿育秧。
適宜機插秧的壯秧應根系發(fā)達、苗高適宜、莖部粗壯、葉挺色綠、青秀無病、均勻整齊。根系短、白、粗、多,盤結牢固,提起不散。葉齡3.0—4.5葉,苗高12—18cm,最大不超過25cm,秧齡20—30天。移栽后發(fā)根力、抗逆性強,能夠早扎根、早活棵、早發(fā)苗。
(三)苗床準備
按照排灌方便、背風向陽、肥力中等、便于管理的原則提前備足秧田(或大棚苗床),秧田與大田面積比一般為1:80—100,大缽體毯狀苗秧田與大田面積比為1:60—70。育秧床土應提前調(diào)酸、培肥和消毒,pH值一般為4.5—6.0,最大不超過6.5;有條件地區(qū)宜選用基質(zhì)育秧。如采用大田秧池育秧,應在播種前一周將秧田翻耕平整,達到“上糊下松、溝深面平、肥足草凈、軟硬適中” 畦面標準,秧床頂面寬1.3—1.4m,平整光滑;秧溝寬0.25—0.30m,深0.15—0.20m;四周開較深圍溝,確保良好的通氣性、透水性,提高秧苗的抗低溫冷害能力。
(四)適期播種
根據(jù)品種特性、早晚稻茬口期確定適宜播種期、播種量和秧齡,培育適齡壯秧;一般根據(jù)適宜移栽期,按照秧齡20—30天倒推播種期。播種時,根據(jù)機插秧作業(yè)計劃做好分期播種育苗,防止移栽時秧苗超齡。應盡可能采用機械化精量播種方式,宜選用流水線播種,一次性完成裝土、灑水(包括消毒、施肥)、精密播種、覆蓋表土等多個環(huán)節(jié);也可選用軌道式播種機械;田間泥漿育秧可選用田間播種器播種。
水稻種子發(fā)芽率應達到90%以上。播種前,應做好曬種、脫芒、選種、藥劑浸種和催芽等準備工作。浸種前3—5天,選晴天曬種3—4小時,雜交稻只攤開透氣,不曬種。選種可采用風選、篩選、水選等方式,水選一般用黃泥水或鹽水,溶液比重為1.05—1.10。選種后,應用清水洗凈后再浸種,宜采用浸種催芽機集中催芽,根據(jù)種子發(fā)芽要求設置好溫濕度等指標,做到“快、齊、勻、壯”,以露白破胸為宜。
應選擇冷空氣結束、氣溫變暖時搶晴播種。播種前,應做好機械調(diào)試。應調(diào)整至適宜的播種量、底土量和覆土量。播種量根據(jù)品種類型、季節(jié)和秧盤規(guī)格確定,常規(guī)稻播種量(30cm行距)秧盤一般80—120g/盤,每畝30盤左右;雜交稻可根據(jù)品種特性適當減少播種量,一般70—90g/盤;窄行(25cm行距)秧盤按寬行(30cm行距)秧盤的面積作相應的減量調(diào)整;播種應精量均勻、不重不漏。底土厚度一般為2.2—2.5cm,覆土厚度為0.3—0.5cm,應覆土均勻、不露籽。播種灑水量應達到秧盤底土濕潤、表面無積水、盤底無滴水,播種覆土后能濕透床土。
如采取大田育秧方式,應將已播種的秧盤,移至秧池田,放置在準備好的秧床上;秧盤應盤邊相貼,搭建拱棚,蓋膜保溫,蓋膜后四周用泥土壓實,防止被風吹開,提高保溫效果。
(五)秧苗管理
水分管理應實現(xiàn)旱育秧,保持秧板土壤濕潤和供氧充足。如遇低溫冷害,應及時蓋膜,保溫防凍,并灌深水護苗;低溫過后,應逐漸排淺水層,以免造成秧苗生理失水,導致青枯死苗。2葉期后,應以淺灌為主,保持土壤濕潤,不留水層,以水控苗,防止徒長。移栽前5—6天,應控濕煉苗,天晴灌半溝水蹲苗,或放水煉苗,促進秧苗盤根成毯,增加秧塊盤結力,便于卷苗運輸和機插作業(yè)。2葉1心時,每畝施用尿素2kg作為斷奶肥;移栽前3—5天,每畝追施尿素2.5—3kg作“送嫁肥”。
應適時(一般2葉1心開始)揭膜煉壯苗,根據(jù)氣溫變化調(diào)控揭膜通風時間和揭膜程度,一般晴天中午秧廂兩頭揭膜通風換氣,傍晚時蓋好。膜內(nèi)溫度保持在20—30℃為宜,超過 30 ℃時應揭開薄膜兩頭進行通風,控溫不超過35℃,以防止爛秧和燒苗。如遇長期低溫陰雨,應盡量延長蓋膜期,促進秧苗生長。經(jīng)過充分煉苗后,秧齡在2.5—3葉時揭膜,揭膜時間宜選在晴天下午,廂溝內(nèi)先灌水后再揭開兩頭或一側(cè),以防青枯死苗。揭膜后,如遇連續(xù)陰雨天氣或極端低溫惡劣天氣應繼續(xù)蓋膜,每隔 3—5天于中午揭開兩頭通風換氣,降低膜內(nèi)濕度,減輕霉菌的發(fā)生。秧苗移栽前3天應揭膜煉苗,提高抗逆能力,以利于栽插后扎根返青。
應加強苗期病蟲害防治,特別是立枯病和惡苗病的防治。移栽前,對秧苗噴施一次對口農(nóng)藥,做到帶藥栽插,以便有效控制大田活棵返青期的病蟲害。秧苗見綠后,應根據(jù)機插秧齡和品種噴施生長調(diào)節(jié)劑控制生長,可根據(jù)不同型號藥劑的產(chǎn)品說明書進行配制和施用,一般采用300ppm多效唑溶液每畝配水30kg均勻噴施。
三、機插秧
(一)秧苗準備
根據(jù)作業(yè)時間和進度,合理安排起秧時間和規(guī)模,做到隨起、隨運、隨插;應盡量減少秧苗擠壓和秧塊搬動,避免運送過程中秧塊變形及秧苗折斷。起秧時,應先拉斷穿過盤底滲水孔的少量根系,連盤帶秧一并提起,再平放,小心卷苗脫盤;宜采用秧苗托盤和運秧架運秧;運至田頭時,應卸下平放,使秧苗自然舒展,并及時采取遮蔭措施,嚴防暴曬,避免秧苗失水枯萎。
(二)機械準備
根據(jù)秧盤規(guī)格選擇適宜型式的插秧機。為提高工作效率和栽插質(zhì)量,宜選用高速插秧機;為提高栽插密度,宜選用窄行(25cm)插秧機;為提高肥料利用率,宜選用帶有同步側(cè)深施肥功能的插秧機。
插秧作業(yè)前,應提前加注潤滑油,并檢查調(diào)試插秧機,一般空運轉(zhuǎn)5—10分鐘,確保各部件運轉(zhuǎn)靈活、無碰撞卡滯現(xiàn)象;應提前調(diào)整栽插株距、取秧量和栽插深度。裝秧苗前,應將秧箱移動到導軌的一端,避免漏插;秧塊應緊貼秧箱,不拱起,兩片秧塊接頭處應對齊無間隙;必要時,應灑水潤滑秧箱面板,使秧塊下滑順暢。
(三)機插秧作業(yè)
根據(jù)水稻品種及栽插季節(jié)確定適宜栽插密度。一般常規(guī)稻株距12—16cm,每穴4—6株,種植密度1.7—2.2萬穴/畝;雜交稻株距14—17cm,每穴2—3株,種植密度1.6—2.0萬穴/畝。為促進低節(jié)位分蘗,宜淺栽。
作業(yè)后,秧苗應栽插均勻,深淺一致,一般漏插率≤5%,傷秧率≤4%,漂秧率≤3%,插秧深度1—3cm。
四、田間管理
(一)施肥管理
根據(jù)水稻目標產(chǎn)量、稻田土壤肥力和品種類型,結合配方施肥要求,合理制定施肥量,培育高產(chǎn)群體;宜增施有機肥;一般有機肥和磷肥作為基肥,在整地前可采用機械撒肥機等施肥機具施入,經(jīng)耕(旋)耙施入土中。鉀肥按基肥和穗肥各50%施用;氮肥按基肥50%、分蘗肥30%、穗肥20%比例施用
不同稻區(qū)水稻高產(chǎn)栽培需肥量(kg/畝)
(二)水分管理
應提前檢修灌溉設施,增加灌溉水源,擴大灌溉面積,推廣節(jié)水灌溉技術,及時澆灌保苗,加強抗旱春管。
宜采用淺濕灌溉方式?;羁梅登嗥谝话惚3?—3cm淺水層;秸稈還田田塊在栽后2個葉齡期內(nèi)應有2—3次露田,以利還田秸稈腐解產(chǎn)生的有害氣體釋放,此后結合施分蘗肥建立2—3cm淺水層。全田莖蘗數(shù)達到預期穗數(shù)80%左右時,采用稻田開溝機開溝,及時排水擱田,通過多次輕擱,使土壤沉實不陷腳,葉片挺起,葉色顯黃。拔節(jié)后,應采用淺水層間歇灌溉方式,促進根系生長,控制基部節(jié)間長度和株高,使株型挺拔、抗倒,改善受光姿態(tài)。開花結實期,應采用淺濕灌溉方式,保持植株較多的活根數(shù)及綠葉數(shù),促進植株活熟到老,提高結實率與粒重。
(三)病蟲草害防治
應強化監(jiān)測預警,提前防范重大病蟲害,推行分區(qū)施策、分類指導,落實稻瘟病、紋枯病、白葉枯病以及稻飛虱、粘蟲和稻縱卷葉螟等重點病蟲防控關鍵技術。應根據(jù)不同病蟲草害情況,合理用藥,宜選用高效、低毒(生物)農(nóng)藥及生物、物理防治技術,實施精準施藥,減少污染。應大力開展統(tǒng)防統(tǒng)治、群防群治,提高防治效果,遏制重大病蟲暴發(fā)流行危害,實現(xiàn)“蟲口奪糧”。
在機插秧作業(yè)前1周內(nèi),結合整地開展一次性除草劑封閉滅草,施藥后保水3—4天。機插秧作業(yè)后1周內(nèi),應根據(jù)雜草種類結合施肥噴施除草劑,施藥時水層應為3—5cm,保水3—4天;有條件的地區(qū),可在機插秧作業(yè)后2周左右,采用機械中耕除草,除草時水層應為3—5cm。
根據(jù)經(jīng)營規(guī)模和地塊大小,因地制宜地選用適用的高效植保機械。連片成方的規(guī)模種植,宜選用自走式噴桿噴霧機進行統(tǒng)防統(tǒng)治;丘陵山區(qū)及分散小地塊,自走式植保機械下田困難、頻繁調(diào)頭輪轍壓苗,可選用植保無人機或擔架式植保機械。
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