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南方冬閑田油菜生產(chǎn)全程機(jī)械化技術(shù)指導(dǎo)意見
2022-09-20
09:49:57
來(lái)源:農(nóng)業(yè)機(jī)械化管理司 閱讀量:15393
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【農(nóng)機(jī)網(wǎng) 熱點(diǎn)關(guān)注】利用南方冬閑田發(fā)展油菜生產(chǎn),對(duì)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(jìn)油菜生產(chǎn)全程機(jī)械化發(fā)展,加強(qiáng)農(nóng)機(jī)農(nóng)藝融合,推動(dòng)機(jī)械化作業(yè)水平提高,以機(jī)械化力量支撐油菜擴(kuò)種,特制定南方冬閑田油菜生產(chǎn)全程機(jī)械化技術(shù)指導(dǎo)意見,供各地參考。
一、種植前準(zhǔn)備
(一)品種選擇
各地應(yīng)在適合當(dāng)?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(qiáng)、抗倒伏、抗裂角、抗病、株型緊湊等適合機(jī)械化作業(yè)特性相對(duì)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(jìn)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(shí),提高發(fā)芽率;針對(duì)當(dāng)?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(jìn)行拌種或包衣處理,及時(shí)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(shí)播種的地區(qū),應(yīng)采用育苗移栽。油菜育苗與機(jī)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(jī)械除毯狀苗移栽機(jī)以外,其他兩類機(jī)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(bǔ)墑覆蓋、揭蓋控水和肥料管理等幾個(gè)環(huán)節(jié)。油菜毯狀苗育苗過(guò)程關(guān)鍵點(diǎn)如下:
1.床土配置。床土選取來(lái)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(jī)肥5—25g。將濃度為50%的多菌靈配成1000倍液,按100kg營(yíng)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(jìn)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(jìn)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(shí)間后要將秧盤及時(shí)擺盤。擺盤時(shí)機(jī)對(duì)后期出苗至關(guān)重要。擺盤時(shí)機(jī)可用三種方法控制:一是按時(shí)間估計(jì),正常育苗季節(jié),疊盤后36—48小時(shí)。二是按有效積溫估算,疊盤后有效積溫達(dá)到45—50度日。三是根據(jù)目測(cè),當(dāng)看到秧盤內(nèi)有1/3左右的籽粒露黃時(shí)即要將秧盤擺出到育苗場(chǎng)地。
7.補(bǔ)墑覆蓋。秧盤擺出后對(duì)缺水的地方進(jìn)行補(bǔ)水,然后進(jìn)行覆蓋,覆蓋材料為30—50g/m2的白色無(wú)紡布。
8.揭蓋控水。當(dāng)秧苗子葉完全展平且變綠時(shí),即擺盤后36—48小時(shí)左右,可揭去無(wú)紡布。此后適當(dāng)控制水分供應(yīng),以邊角部位不發(fā)生萎蔫為度,以促進(jìn)根系下扎。發(fā)生萎蔫時(shí)可少量補(bǔ)充水分。2葉期之前如遇大雨要適當(dāng)遮蓋。
9.肥料管理。間隔2—3天用營(yíng)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(shí)可將尿素溶于水中進(jìn)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(shí)應(yīng)選用帶秸稈粉碎裝置的聯(lián)合
收獲機(jī),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(jī)將秸稈粉碎,再用帶有翻轉(zhuǎn)埋茬功能的
旋耕機(jī)整地,再用開溝機(jī)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(jī)具作業(yè)。開溝作廂寬度應(yīng)與油菜種植、收獲機(jī)械作業(yè)寬度相對(duì)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(dāng)?shù)赝寥李愋?、氣候條件、作業(yè)習(xí)慣在此基礎(chǔ)上適當(dāng)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(shí)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(dāng)?shù)剞r(nóng)藝要求及土壤肥力,合理計(jì)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(dāng)?shù)赝寥捞匦约胺柿l件進(jìn)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(jī)具施用基肥時(shí),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(jī)械種植
南方冬閑田油菜要做到適墑?chuàng)尫N,機(jī)械種植方式分為機(jī)械直播、無(wú)人機(jī)飛播和機(jī)械移栽三種。
(一)機(jī)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(shí)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(wàn)株/hm2。播種期推遲時(shí)應(yīng)適當(dāng)加大播種量。
在播種機(jī)具選擇上,應(yīng)根據(jù)土壤墑情、前茬作物品種以及當(dāng)?shù)夭シN機(jī)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(jī),或少、免耕精量油菜播種機(jī)等。按照機(jī)具使用說(shuō)明書要求進(jìn)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(wú)人機(jī)飛播
無(wú)人機(jī)飛播油菜能適當(dāng)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(jī)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(zhǔn)備后,采用無(wú)人機(jī)進(jìn)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(dāng)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(dāng)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(jī)型進(jìn)行微調(diào)。飛播前田塊土壤適當(dāng)留墑(土壤含水量30%左右),如田塊較為干旱,需適當(dāng)灌溉補(bǔ)水。無(wú)人機(jī)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(dāng)降低飛播作業(yè)高度、縮小飛播播幅,同時(shí)考慮飛行航路設(shè)置中的偏移補(bǔ)償。
(三)機(jī)械移栽
油菜毯狀苗機(jī)械移栽是解決茬口矛盾,擴(kuò)大南方冬閑田油菜種植的一項(xiàng)重要技術(shù)。適合油菜毯狀苗機(jī)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(dá),盤根成毯,雙手托起時(shí)苗片不斷裂。移栽前控制苗片基質(zhì)(土)絕對(duì)含水率≥50%為宜。
在移栽機(jī)具選擇上,目前有兩種移栽機(jī),一種是以插秧機(jī)底盤為動(dòng)力的油菜毯狀苗全自動(dòng)移栽機(jī);另一種是在此基礎(chǔ)上開發(fā)的以拖拉機(jī)為動(dòng)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(jī)。聯(lián)合移栽機(jī)對(duì)南方稻田黏重土壤、秸稈全量還田條件的適應(yīng)性更強(qiáng)、栽植質(zhì)量更高。油菜移栽按照機(jī)具使用說(shuō)明書要求進(jìn)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(yán)重應(yīng)適當(dāng)灌水,或畦溝浸水。
(二)施肥
根據(jù)各地土壤情況及對(duì)油菜幼苗的長(zhǎng)勢(shì),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(shí)施肥,第二次在植株長(zhǎng)成3—5片新葉時(shí)施肥。可采用無(wú)人機(jī)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(shí)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(jìn)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(bào)”選用對(duì)口藥劑,及時(shí)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(jī)具選擇上,可采用植保無(wú)人飛機(jī)、機(jī)動(dòng)噴霧噴粉機(jī)、背負(fù)式噴霧噴粉機(jī)等機(jī)具進(jìn)行機(jī)械化植保作業(yè),機(jī)械化植保作業(yè)應(yīng)符合噴霧機(jī)(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(jī)具。
對(duì)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(shí)機(jī),聯(lián)合收獲可以獲得較好的收獲效果。對(duì)于規(guī)?;N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(shí),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(jìn)行。首選油菜籽聯(lián)合收獲機(jī),也可用谷物聯(lián)合收割機(jī)加裝強(qiáng)制分禾裝置(側(cè)豎割刀)、加長(zhǎng)割臺(tái)(加長(zhǎng)30cm左右)等進(jìn)行適應(yīng)性改造。
采用分段收獲方式時(shí),應(yīng)在全田油菜80%左右角果外觀顏色開始變黃時(shí),先用油菜割曬機(jī)進(jìn)行割倒并有序鋪放,晾曬4—7天后,選用裝有油菜撿拾臺(tái)的聯(lián)合收獲機(jī)及時(shí)進(jìn)行撿拾脫粒作業(yè),也可人工集中喂入油菜脫粒機(jī)或油菜籽收獲機(jī)進(jìn)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(jī)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(jī)械。新購(gòu)置油菜籽聯(lián)合收獲機(jī)或撿拾收獲機(jī)應(yīng)配置莖稈粉碎裝置,便于莖稈粉碎還田。
油菜收獲時(shí)按照機(jī)具使用說(shuō)明書要求進(jìn)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(jī)及時(shí)烘干,沒有條件的地區(qū)應(yīng)及時(shí)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(duì)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(shí)烘干或晾曬。
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