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南方冬閑田油菜生產(chǎn)全程機械化技術(shù)指導(dǎo)意見

2022-09-20 09:49:57 來源:農(nóng)業(yè)機械化管理司 閱讀量:15371 評論

導(dǎo)讀:為推進油菜生產(chǎn)全程機械化發(fā)展,加強農(nóng)機農(nóng)藝融合,推動機械化作業(yè)水平提高,以機械化力量支撐油菜擴種,特制定南方冬閑田油菜生產(chǎn)全程機械化技術(shù)指導(dǎo)意見,供各地參考。

  【農(nóng)機網(wǎng) 熱點關(guān)注】利用南方冬閑田發(fā)展油菜生產(chǎn),對提高后茬作物產(chǎn)量、增加油料供給、提高農(nóng)民收入和美化農(nóng)村環(huán)境都具有重要意義。為推進油菜生產(chǎn)全程機械化發(fā)展,加強農(nóng)機農(nóng)藝融合,推動機械化作業(yè)水平提高,以機械化力量支撐油菜擴種,特制定南方冬閑田油菜生產(chǎn)全程機械化技術(shù)指導(dǎo)意見,供各地參考。
 
  一、種植前準備
 
  (一)品種選擇
 
  各地應(yīng)在適合當?shù)厣鷳B(tài)條件、種植制度、綜合性狀優(yōu)良的主推品種中,選擇具有早發(fā)能力強、抗倒伏、抗裂角、抗病、株型緊湊等適合機械化作業(yè)特性相對較好的早熟耐寒油菜品種。
 
  (二)種子處理
 
  選用高質(zhì)量的種子并進行精選處理,要求種子水分不高于9%,純度不低于95%(雜種一代90%左右),凈度不低于97%,發(fā)芽率90%以上。播種前,應(yīng)曬種4—6小時,提高發(fā)芽率;針對當?shù)馗鞣N病蟲害可能發(fā)生的程度,選擇相應(yīng)防治藥劑進行拌種或包衣處理,及時滅殺種子表面的病菌,提高播種后的抗病蟲害能力。
 
  (三)秧盤育苗
 
  在稻油輪作生育期不足或因其他原因不能及時播種的地區(qū),應(yīng)采用育苗移栽。油菜育苗與機械移栽是相互配套的,主要分為毯狀苗、缽苗和裸苗三種形態(tài)苗,但相應(yīng)的移栽機械除毯狀苗移栽機以外,其他兩類機械很難適應(yīng)南方黏重土壤條件,作業(yè)效率低,應(yīng)用較少。油菜毯狀苗育苗主要包括床土配置、種子調(diào)制、育苗播種、蓋種、疊盤保墑、擺盤、補墑覆蓋、揭蓋控水和肥料管理等幾個環(huán)節(jié)。油菜毯狀苗育苗過程關(guān)鍵點如下:
 
  1.床土配置。床土選取來源于前茬非十字花科作物田塊,每升床土中拌入純氮0.3—0.8g ,磷肥和鉀肥各0.2—0.5g, 硼砂0.02—0.04g,經(jīng)腐熟的有機肥5—25g。將濃度為50%的多菌靈配成1000倍液,按100kg營養(yǎng)土加5—6g溶液的用量噴灑,噴后將其拌勻,用膜密封2—3天,殺死土壤中的病菌。
 
  2.種子調(diào)制。按每1000ml清水加入濃度為5%的烯效唑5g配制溶液,每100g種子加入1—4ml溶液拌種調(diào)制,晾干后進行育苗播種。
 
  3.育苗播種。采用28cm×58cm規(guī)格的秧盤,盤底鋪麻地膜,播種密度為800—1000粒/盤,均勻播種。
 
  4.蓋種。播種后用床土進行蓋種,蓋土厚2—3mm,蓋土含水率為最大持水量的40%—50%。
 
  5.疊盤保墑。蓋土后的秧盤層層疊放在一起,疊放層數(shù)以40—80層為宜。
 
  6.擺盤。疊盤一段時間后要將秧盤及時擺盤。擺盤時機對后期出苗至關(guān)重要。擺盤時機可用三種方法控制:一是按時間估計,正常育苗季節(jié),疊盤后36—48小時。二是按有效積溫估算,疊盤后有效積溫達到45—50度日。三是根據(jù)目測,當看到秧盤內(nèi)有1/3左右的籽粒露黃時即要將秧盤擺出到育苗場地。
 
  7.補墑覆蓋。秧盤擺出后對缺水的地方進行補水,然后進行覆蓋,覆蓋材料為30—50g/m2的白色無紡布。
 
  8.揭蓋控水。當秧苗子葉完全展平且變綠時,即擺盤后36—48小時左右,可揭去無紡布。此后適當控制水分供應(yīng),以邊角部位不發(fā)生萎蔫為度,以促進根系下扎。發(fā)生萎蔫時可少量補充水分。2葉期之前如遇大雨要適當遮蓋。
 
  9.肥料管理。間隔2—3天用營養(yǎng)液澆水一次。出苗期、一葉一心期和二葉一心期分別施尿素1g/盤,移栽前施尿素2g/盤。施用時可將尿素溶于水中進行噴施。
 
  (四)田塊整理
 
  1.前茬作物秸稈處理。前茬水稻等作物收獲時應(yīng)選用帶秸稈粉碎裝置的聯(lián)合收獲機,秸稈切碎后均勻拋灑,避免秸稈堆積。采用油菜直播種植方式,前茬作物留茬高度≤20cm;采用油菜移栽種植方式,前茬作物留茬高度≤40cm。
 
  2.耕整地。油菜種植前先用秸稈粉碎還田機將秸稈粉碎,再用帶有翻轉(zhuǎn)埋茬功能的旋耕機整地,再用開溝機作廂,形成1.8米左右畦面寬度,畦面要平整;也可采用集秸稈粉碎、翻轉(zhuǎn)埋茬、開溝作畦于一體的復(fù)式耕整地機具作業(yè)。開溝作廂寬度應(yīng)與油菜種植、收獲機械作業(yè)寬度相對應(yīng),廂溝、腰溝、邊溝配套,溝深15—20cm,溝上口寬≥25cm,溝底寬≥15cm。開溝深度、寬度各地應(yīng)根據(jù)當?shù)赝寥李愋?、氣候條件、作業(yè)習(xí)慣在此基礎(chǔ)上適當調(diào)整。
 
  3.墑情控制。土壤含水率在15%—30%為宜,在有灌排條件地方,要根據(jù)土壤墑情適時排灌;在土壤含水率高、雨水多的地區(qū),可采用起壟,壟高≥12cm,壟寬70—90cm或140—180cm。
 
  (五)基肥施用
 
  在種植前,應(yīng)根據(jù)當?shù)剞r(nóng)藝要求及土壤肥力,合理計算肥料的施用量。基肥施用量為總施肥量的50%。硼肥、氮肥、鉀肥應(yīng)根據(jù)當?shù)赝寥捞匦约胺柿l件進行配施。一般氮磷鉀復(fù)合肥300—600kg/hm2,或緩釋肥450kg/hm2;硼砂7.5—11.25kg/hm2,并符合《NY/T 790-2004 雙低油菜生產(chǎn)技術(shù)規(guī)程》。在采取種肥混播復(fù)式作業(yè)機具施用基肥時,應(yīng)選用不易吸水的顆粒肥料,以防止化肥在肥箱中結(jié)塊堵塞。
 
  二、機械種植
 
  南方冬閑田油菜要做到適墑?chuàng)尫N,機械種植方式分為機械直播、無人機飛播和機械移栽三種。
 
  (一)機械直播
 
  播種期一般在9月下旬至10月上、中旬,前茬作物收獲完及時搶種,提倡早播。播種行距20—30cm,播種量3—4.5kg/hm2,播種深度5—25mm,油菜出苗株數(shù)應(yīng)≥37.5萬株/hm2。播種期推遲時應(yīng)適當加大播種量。
 
  在播種機具選擇上,應(yīng)根據(jù)土壤墑情、前茬作物品種以及當?shù)夭シN機使用情況,選擇具有一次完成旋耕、滅茬、起壟、開溝作畦、播種、施肥等多種工序聯(lián)合直播機,或少、免耕精量油菜播種機等。按照機具使用說明書要求進行作業(yè)。播種作業(yè)質(zhì)量應(yīng)符合漏播率≤2%、各行播量一致性變異系數(shù)≤7%、行距一致性變異系數(shù)≤5%的要求。
 
  (二)無人機飛播
 
  無人機飛播油菜能適當緩解南方冬閑田茬口銜接矛盾,作業(yè)效率高,而且與地面播種機械相比,受田間條件影響小。一般是在完成前茬水稻收割以及開溝、旋耕等整地準備后,采用無人機進行油菜籽飛播。如果前茬水稻收獲前土壤墑情適宜,可以在水稻收獲前5—7天飛播油菜,提前播種適當緩解茬口矛盾。油菜飛播播種量4.5—6kg/hm2,隨著播期推遲,可適當增加播量。飛播作業(yè)以高度3m左右、速度5m/s左右、播幅4.5m左右為參考,具體參數(shù)根據(jù)所采用機型進行微調(diào)。飛播前田塊土壤適當留墑(土壤含水量30%左右),如田塊較為干旱,需適當灌溉補水。無人機飛播應(yīng)考慮天氣因素,應(yīng)選擇風(fēng)速較小天氣,如遇側(cè)風(fēng)較大,可適當降低飛播作業(yè)高度、縮小飛播播幅,同時考慮飛行航路設(shè)置中的偏移補償。
 
  (三)機械移栽
 
  油菜毯狀苗機械移栽是解決茬口矛盾,擴大南方冬閑田油菜種植的一項重要技術(shù)。適合油菜毯狀苗機械移栽的秧苗密度3000 株/m2左右,苗高80mm—120mm,苗齡≥30天,葉齡5—8葉,綠葉數(shù)3—4片;苗片秧苗直立、分布均勻,空穴率≤10%;秧苗健壯,根系發(fā)達,盤根成毯,雙手托起時苗片不斷裂。移栽前控制苗片基質(zhì)(土)絕對含水率≥50%為宜。
 
  在移栽機具選擇上,目前有兩種移栽機,一種是以插秧機底盤為動力的油菜毯狀苗全自動移栽機;另一種是在此基礎(chǔ)上開發(fā)的以拖拉機為動力,集成旋耕埋茬、開溝作畦、移栽鎮(zhèn)壓等功能于一體的聯(lián)合移栽機。聯(lián)合移栽機對南方稻田黏重土壤、秸稈全量還田條件的適應(yīng)性更強、栽植質(zhì)量更高。油菜移栽按照機具使用說明書要求進行作業(yè),作業(yè)速度控制在1m/s以內(nèi),株距14—18cm之間,栽植深度1.5—5cm;移栽作業(yè)質(zhì)量應(yīng)符合栽植合格率≥80%、漏栽率≤8%、栽植深度合格率≥75%的要求。
 
  三、田間管理
 
  (一)澆活棵水
 
  移栽后土壤墑情好或有降雨,不需噴灑活棵水,如果干旱嚴重應(yīng)適當灌水,或畦溝浸水。
 
  (二)施肥
 
  根據(jù)各地土壤情況及對油菜幼苗的長勢,合理追肥,保證油菜苗數(shù)。直播油菜一般在間苗后施苗肥,定苗后施第二次追肥;移栽油菜第一次追肥在幼苗成活時施肥,第二次在植株長成3—5片新葉時施肥。可采用無人機撒施。
 
  (三)植保
 
  1.芽前除草。油菜田除草應(yīng)注重播前及播后各時期的操作環(huán)節(jié),即播種(移栽)前殺滅前期老草,這是油菜田除草的基礎(chǔ);播種(移栽)后1—2天雜草出土前,使用相應(yīng)的除草劑噴施土壤,有利于藥膜展開,封閉土壤,阻止雜草種子萌發(fā)。
 
  2.苗期除草。苗后噴施除草劑在油菜4—5葉期進行,選用選擇性除草劑防除油菜中的單、雙子葉雜草。
 
  3.油菜生育中后期病蟲害防治。應(yīng)根據(jù)“病蟲情報”選用對口藥劑,及時安全用藥。苗期主要防治蚜蟲,苔花期主要防治菌核病,在油菜初花期主要防治菌核病、霜毒病。
 
  在植保機具選擇上,可采用植保無人飛機、機動噴霧噴粉機、背負式噴霧噴粉機等機具進行機械化植保作業(yè),機械化植保作業(yè)應(yīng)符合噴霧機(器)作業(yè)質(zhì)量、噴霧器安全施藥技術(shù)規(guī)范等方面的要求。
 
  四、收獲
 
  油菜收獲分為聯(lián)合收獲和分段收獲兩種方式。應(yīng)根據(jù)油菜種植方式、氣候條件、種植規(guī)模、田塊大小等因素因地制宜選擇適宜的收獲方式和機具。
 
  對于小規(guī)模、小田塊直播油菜或株型適中的移栽油菜,在適宜的收獲時機,聯(lián)合收獲可以獲得較好的收獲效果。對于規(guī)模化種植且田塊較大的油菜,以及植株高大、高產(chǎn)的移栽油菜,宜采用分段收獲方式。收獲期多雨或有極端天氣的地區(qū),采用分段收獲安全性高。
 
  采用聯(lián)合收獲方式時,應(yīng)在全田油菜90%以上角果外觀顏色全部變黃色或褐色,完熟度基本一致的條件下進行。首選油菜籽聯(lián)合收獲機,也可用谷物聯(lián)合收割機加裝強制分禾裝置(側(cè)豎割刀)、加長割臺(加長30cm左右)等進行適應(yīng)性改造。
 
  采用分段收獲方式時,應(yīng)在全田油菜80%左右角果外觀顏色開始變黃時,先用油菜割曬機進行割倒并有序鋪放,晾曬4—7天后,選用裝有油菜撿拾臺的聯(lián)合收獲機及時進行撿拾脫粒作業(yè),也可人工集中喂入油菜脫粒機或油菜籽收獲機進行脫粒。
 
  南方冬閑田越冬油菜田間開有縱向、橫向排水降漬溝,不便于小型輪式機作業(yè),應(yīng)選擇適宜田塊大小和種植規(guī)模的履帶式收獲機械。新購置油菜籽聯(lián)合收獲機或撿拾收獲機應(yīng)配置莖稈粉碎裝置,便于莖稈粉碎還田。
 
  油菜收獲時按照機具使用說明書要求進行作業(yè),聯(lián)合收獲作業(yè)質(zhì)量應(yīng)符合總損失率≤8%、含雜率≤6%、破碎率≤0.5%的要求,割茬高度應(yīng)根據(jù)農(nóng)戶要求在10—30cm;分段收獲作業(yè)質(zhì)量應(yīng)符合總損失率≤6.5%、含雜率≤5%、破碎率≤0.5%等要求。
 
  五、烘干
 
  聯(lián)合收獲后的油菜籽含水率高,極易發(fā)生霉變,應(yīng)采用烘干機及時烘干,沒有條件的地區(qū)應(yīng)及時晾曬,以防霉變。分段收獲的油菜籽含水率普遍比聯(lián)合收獲的低,對于田間晾曬充分油菜籽含水率低于10%的,可以不再烘干和晾曬,否則應(yīng)及時烘干或晾曬。
 
  農(nóng)業(yè)農(nóng)村部農(nóng)業(yè)機械化管理司
 
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  農(nóng)業(yè)農(nóng)村部農(nóng)作物生產(chǎn)全程機械化專家指導(dǎo)組
 
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