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大豆玉米帶狀復(fù)合種植機(jī)械化收獲減損技術(shù)指導(dǎo)意見(jiàn)

2022-09-20 09:53:38 來(lái)源:農(nóng)業(yè)機(jī)械化管理司 閱讀量:11733 評(píng)論

導(dǎo)讀:聚焦“3 2”(3行大豆 2行玉米,下同)、“4 2”(4行大豆 2行玉米,下同)種植模式,制定了大豆玉米帶狀復(fù)合種植機(jī)械化收獲減損技術(shù)指導(dǎo)意見(jiàn),供各地參考。其他技術(shù)模式可參照應(yīng)用。

  【農(nóng)機(jī)網(wǎng) 熱點(diǎn)關(guān)注】當(dāng)前,即將進(jìn)入大豆玉米復(fù)合種植大面積收獲期。為加快大豆玉米帶狀復(fù)合種植全程機(jī)械化技術(shù)推廣應(yīng)用,針對(duì)部分地區(qū)機(jī)收經(jīng)驗(yàn)不足、損失預(yù)期偏高等問(wèn)題,聚焦“3+2”(3行大豆+2行玉米,下同)、“4+2”(4行大豆+2行玉米,下同)種植模式,制定了大豆玉米帶狀復(fù)合種植機(jī)械化收獲減損技術(shù)指導(dǎo)意見(jiàn),供各地參考。其他技術(shù)模式可參照應(yīng)用。
 
  一、適宜收獲期確定
 
  適期收獲是機(jī)械化收獲減損的關(guān)鍵,根據(jù)作物品種、成熟度、籽粒含水率及氣候等條件,確定兩種作物收獲期,并適期收獲,過(guò)早或過(guò)晚收獲會(huì)對(duì)作物產(chǎn)量和品質(zhì)造成不利影響。
 
  (一)大豆適宜收獲期
 
  大豆適宜收獲期是在黃熟期后至完熟期之間,此時(shí)大豆葉片脫落80%以上,豆莢和籽粒均呈現(xiàn)出原有品種的色澤,籽粒含水率下降到15%—25%,莖稈含水率為45%—55%,豆粒歸圓,植株變成黃褐色,莖和莢變成黃色,用手搖動(dòng)植株會(huì)發(fā)出清脆響聲。大豆收獲作業(yè)應(yīng)選擇早、晚露水消退時(shí)間段進(jìn)行,避免產(chǎn)生“泥花臉”;應(yīng)避開(kāi)中午高溫時(shí)段,減少收獲炸莢損失。
 
  (二)玉米適宜收獲期
 
  玉米適宜收獲期在完熟期,此時(shí)玉米植株的中、下部葉片變黃,基部葉片干枯,果穗變黃,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,籽粒基部(胚下端)出現(xiàn)黑帽層,并呈現(xiàn)出品種固有的色澤。采用果穗收獲,玉米籽粒含水率一般為25%—35%;采用籽粒直收方式,玉米籽粒含水率一般為15%—25%。
 
  二、收獲方式及適宜機(jī)型
 
  根據(jù)大豆、玉米成熟順序差異,收獲方式可分為:先收大豆后收玉米方式、先收玉米后收大豆方式、大豆玉米分步同時(shí)收獲等。根據(jù)種植模式、帶寬行距、地塊大小、作業(yè)要求選擇適宜的收獲機(jī)。
 
  (一)先收大豆后收玉米方式
 
  該方式適用于大豆先熟玉米晚熟地區(qū),主要包括黃淮海、西北等地區(qū)間作方式。作業(yè)時(shí),先選用適宜的窄幅寬大豆收獲機(jī)進(jìn)行大豆收獲作業(yè),再選用2行玉米收獲機(jī)或常規(guī)玉米收獲機(jī)(2行以上玉米收獲機(jī))進(jìn)行玉米收獲作業(yè)。
 
  大豆收獲機(jī)機(jī)型應(yīng)根據(jù)大豆帶寬和相鄰兩玉米帶之間的帶寬選擇,輪式和履帶式均可,應(yīng)做到不漏收大豆、不碾壓或夾帶玉米植株。大豆收獲機(jī)割臺(tái)幅寬一般應(yīng)大于大豆帶寬度40cm(兩側(cè)各20cm)以上,整機(jī)外廓尺寸應(yīng)小于相鄰兩玉米帶帶寬20cm(兩側(cè)各10cm)以上。以大豆玉米帶間距70cm、大豆行距30cm為例,“3+2”種植模式應(yīng)選擇1m≤幅寬<1.7m、整機(jī)寬度<1.8m的大豆收獲機(jī),“4+2”種植模式應(yīng)選擇1.3m≤幅寬<2m、整機(jī)寬度<2.1m的大豆收獲機(jī)。窄幅寬大豆收獲機(jī)宜裝配浮式仿形割臺(tái),幅寬2m以上大豆收獲機(jī)宜裝配專用撓性割臺(tái),割臺(tái)離地高度<5cm,實(shí)現(xiàn)貼地收獲作業(yè),使低節(jié)位豆莢進(jìn)入割臺(tái),降低收獲損失率。
 
  玉米收獲時(shí),大豆已收獲完畢,玉米收獲機(jī)機(jī)型選擇范圍較大,可選用2行玉米收獲機(jī)對(duì)行收獲;也可選用當(dāng)?shù)爻R?guī)玉米收獲機(jī)減幅作業(yè)。
 
  (二)先收玉米后收大豆方式
 
  該方式適用于玉米先熟大豆晚熟地區(qū),主要包括西南地區(qū)套作方式和長(zhǎng)江流域、華北地區(qū)間作方式。作業(yè)時(shí),先選用適宜的2行玉米收獲機(jī)進(jìn)行玉米收獲作業(yè),再選用窄幅寬大豆收獲機(jī)或當(dāng)?shù)爻R?guī)大豆收獲機(jī)(幅寬2m以上)進(jìn)行大豆收獲作業(yè)。
 
  玉米收獲機(jī)機(jī)型應(yīng)根據(jù)玉米帶的行數(shù)、行距和相鄰兩大豆帶之間的寬度選擇,輪式和履帶式均可,應(yīng)做到不碾壓或損傷大豆植株,以免造成炸莢、增加損失。玉米收獲機(jī)輪胎(履帶)外沿與大豆帶距離一般應(yīng)大于15cm。以大豆玉米帶間距70cm、玉米行距40cm、的“3+2”和“4+2”種植模式為例,應(yīng)選擇輪胎(履帶)外側(cè)間距<1.5m、整機(jī)寬度<1.7m的2行玉米收獲機(jī);也可選用高地隙跨帶玉米收獲機(jī),先收兩帶4行玉米。
 
  大豆收獲時(shí),玉米已收獲完畢,大豆收獲機(jī)機(jī)型選擇范圍較大,可選用幅寬與大豆帶寬相匹配的大豆收獲機(jī),幅寬應(yīng)大于大豆帶寬40cm以上;也可選用當(dāng)?shù)爻R?guī)大豆收獲機(jī)減幅作業(yè)。
 
  (三)大豆玉米分步同時(shí)收獲方式
 
  該方式適用于大豆玉米同期成熟地區(qū),主要包括西北、黃淮海等地區(qū)的間作方式。作業(yè)時(shí),對(duì)大豆、玉米收獲順序沒(méi)有特殊要求,主要取決于地塊兩側(cè)種植的作物類別,一般分別選用大豆收獲機(jī)和玉米收獲機(jī)前后布局,輪流收獲大豆和玉米,依次作業(yè)。因作業(yè)時(shí)一側(cè)作物已經(jīng)收獲,對(duì)機(jī)型外廓尺寸、輪距等要求降低,可根據(jù)大豆種植幅寬和玉米行數(shù)選用幅寬匹配的機(jī)型,也可選用常規(guī)收獲機(jī)減幅作業(yè)。
 
  三、機(jī)具調(diào)整改造
 
  (一)調(diào)整改造實(shí)現(xiàn)大豆收獲
 
  目前,市場(chǎng)上專用大豆收獲機(jī)較少,可選用與工作幅寬和外廓尺寸相匹配的履帶式谷物聯(lián)合收割機(jī)進(jìn)行調(diào)整改造。調(diào)整改造方式參照《大豆玉米帶狀復(fù)合種植配套機(jī)具調(diào)整改造指引》(農(nóng)機(jī)科〔2022〕28號(hào))。
 
  (二)調(diào)整改造實(shí)現(xiàn)玉米收獲
 
  目前,常用的玉米收獲機(jī)行距一般為60cm左右,適用于大豆玉米帶狀復(fù)合種植40cm小行距的玉米收獲機(jī)機(jī)型較少。玉米收獲作業(yè)時(shí),行距偏差較大會(huì)增大落穗損失率或降低作業(yè)效率,可將割臺(tái)換裝或改裝為適宜行距割臺(tái),也可換裝不對(duì)行割臺(tái)。對(duì)于植株分杈較多的大豆品種,收獲玉米時(shí),應(yīng)在玉米收獲機(jī)割臺(tái)兩側(cè)加裝分離裝置,分離玉米植株與兩側(cè)大豆植株,避免碾壓大豆植株。
 
  (三)加裝輔助駕駛系統(tǒng)
 
  如果播種時(shí)采用了北斗導(dǎo)航或輔助駕駛系統(tǒng),收獲時(shí),先收作物對(duì)應(yīng)收獲機(jī)也應(yīng)加裝北斗導(dǎo)航或輔助駕駛系統(tǒng),提高駕駛直線度,使機(jī)具沿行間精準(zhǔn)完成作業(yè),減少對(duì)兩側(cè)作物碾壓和夾帶,同時(shí)減少人工操作誤差并降低勞動(dòng)強(qiáng)度。如果播種時(shí)未采用北斗導(dǎo)航或輔助駕駛系統(tǒng),收獲時(shí)根據(jù)作物播種作業(yè)質(zhì)量確定是否加裝北斗導(dǎo)航或輔助駕駛系統(tǒng),如播種作業(yè)質(zhì)量好可加裝,否則沒(méi)有加裝必要。
 
  四、減損收獲作業(yè)
 
  (一)科學(xué)規(guī)劃作業(yè)路線
 
  對(duì)于大豆、玉米分期收獲地塊,如果地頭種植了先熟作物,應(yīng)先收地頭先熟作物,方便機(jī)具轉(zhuǎn)彎調(diào)頭,實(shí)現(xiàn)往復(fù)轉(zhuǎn)行收獲,減少空載行駛;如果地頭未種植先熟作物,作業(yè)時(shí)轉(zhuǎn)彎調(diào)頭應(yīng)盡量借用田間道路或已收獲完的周邊地塊。
 
  對(duì)于大豆、玉米同期收獲地塊,應(yīng)先收地頭作物,方便機(jī)具轉(zhuǎn)彎調(diào)頭,實(shí)現(xiàn)往復(fù)轉(zhuǎn)行收獲,減少空載行駛;然后再分別選用大豆收獲機(jī)和玉米收獲機(jī)依次作業(yè)。
 
  (二)提前開(kāi)展調(diào)整試收
 
  作業(yè)前,應(yīng)依據(jù)產(chǎn)品使用說(shuō)明書(shū)對(duì)機(jī)具進(jìn)行一次全面檢查與保養(yǎng),確保機(jī)具技術(shù)狀態(tài)良好;應(yīng)根據(jù)作物種植密度、模式及田塊地表狀態(tài)等作業(yè)條件對(duì)收獲機(jī)作業(yè)參數(shù)進(jìn)行調(diào)整,并進(jìn)行試收,試收作業(yè)距離以30—50m為宜。試收后,應(yīng)檢查先收作業(yè)是否存在碾壓、夾帶兩側(cè)作物現(xiàn)象,有無(wú)漏割、堵塞、跑漏等異常情況,對(duì)照作業(yè)質(zhì)量標(biāo)準(zhǔn)檢測(cè)損失率、破碎率、含雜率等。如作業(yè)效果欠佳,應(yīng)再次對(duì)收獲機(jī)進(jìn)行適當(dāng)調(diào)整和試收檢驗(yàn),直至作業(yè)質(zhì)量?jī)?yōu)于標(biāo)準(zhǔn),并達(dá)到滿意的作業(yè)效果。
 
  (二)合理確定作業(yè)速度
 
  作業(yè)速度應(yīng)根據(jù)種植模式、收獲機(jī)匹配程度確定,禁止為追求作業(yè)效率而降低作業(yè)質(zhì)量。如選用常規(guī)大型收獲機(jī)減幅作業(yè),應(yīng)注意通過(guò)作業(yè)速度實(shí)時(shí)控制喂入量,使機(jī)器在額定負(fù)荷下工作,避免作業(yè)喂入量過(guò)小降低機(jī)具性能。大豆收獲時(shí),如大豆帶田間雜草太多,應(yīng)降低作業(yè)速度,減少喂入量,防止出現(xiàn)堵塞或含雜率過(guò)高等情況。
 
  對(duì)于大豆先收方式,大豆收獲作業(yè)速度應(yīng)低于傳統(tǒng)凈作,一般控制在3—6km/h,可選用Ⅱ擋,發(fā)動(dòng)機(jī)轉(zhuǎn)速保持在額定轉(zhuǎn)速,不能低轉(zhuǎn)速下作業(yè)。若播種和收獲環(huán)節(jié)均采用北斗導(dǎo)航或輔助駕駛系統(tǒng),收獲作業(yè)速度可提高至4—8km/h。玉米收獲時(shí),兩側(cè)大豆已收獲完,可按正常作業(yè)速度行駛。
 
  對(duì)于玉米先收方式,受兩側(cè)大豆植株以及玉米種植密度高的影響,玉米收獲作業(yè)速度應(yīng)低于傳統(tǒng)凈作,一般控制在3—5km/h。如采用行距大于55cm的玉米收獲機(jī),或種植行距寬窄不一、地形起伏不定、早晚及雨后作物濕度大時(shí),應(yīng)降低作業(yè)速度,避免損失率增大。大豆收獲時(shí),兩側(cè)玉米已收獲完,可按正常作業(yè)速度行駛。
 
  (三)強(qiáng)化駕駛操作規(guī)范
 
  大豆收獲時(shí),應(yīng)以不漏收豆莢為原則,控制好大豆收獲機(jī)割臺(tái)高度,盡量放低割臺(tái),將割茬降至4—8cm,避免漏收低節(jié)位豆莢。作業(yè)時(shí),應(yīng)將大豆帶保持在幅寬中間位置,并直線行駛,避免漏收大豆或碾壓、夾帶玉米植株。應(yīng)及時(shí)停車觀察糧倉(cāng)中大豆清潔度和尾篩排出秸稈夾帶損失率,并適時(shí)調(diào)整風(fēng)機(jī)風(fēng)量。
 
  玉米收獲時(shí),應(yīng)嚴(yán)格對(duì)行收獲,保證割道與玉米帶平行,且收獲機(jī)輪胎(履帶)要在大豆帶和玉米帶間空隙的中間,避免碾壓兩側(cè)大豆。作業(yè)時(shí),應(yīng)將割臺(tái)降落到合適位置,使摘穗板或摘穗輥前部位于玉米結(jié)穗位下部30—50cm處,并注意觀察摘穗機(jī)構(gòu)、剝皮機(jī)構(gòu)等是否有堵塞情況。玉米先收時(shí),應(yīng)確保玉米秸稈不拋灑在大豆帶,提高大豆收獲機(jī)通過(guò)性和作業(yè)清潔度。
 
  (四)妥善解決倒伏情況
 
  復(fù)合種植倒伏地塊收獲時(shí),應(yīng)根據(jù)作物成熟期以及倒伏方向,規(guī)劃好收獲順序和作業(yè)路線;收獲機(jī)調(diào)整改造和作業(yè)注意事項(xiàng)可參照傳統(tǒng)凈作方式,此外為避免收獲時(shí)倒伏帶來(lái)的混雜,可加裝分禾裝置。
 
  先收大豆時(shí),可提前將倒伏在大豆帶的玉米植株扶正或者移出大豆帶,方便大豆收獲作業(yè),避免碾壓玉米果穗造成損失,或混收玉米增大含雜率。
 
  先收玉米時(shí),如大豆和玉米倒伏方向一致,應(yīng)選用調(diào)整改造后的玉米收獲機(jī)對(duì)行逆收作業(yè)或?qū)π袀?cè)收作業(yè);如果大豆和玉米倒伏方向沒(méi)有規(guī)律,可提前將倒伏在玉米帶的大豆植株扶正或者移出玉米帶,方便玉米收獲作業(yè),避免玉米收獲機(jī)碾壓倒伏大豆。
 
  分步同時(shí)收獲時(shí),如大豆和玉米倒伏方向一致,一般先收倒伏玉米,玉米收獲后,倒伏在大豆帶內(nèi)的玉米植株減少,將剩余倒伏在大豆帶的玉米植株扶正或者移出大豆帶后,再開(kāi)展大豆收獲作業(yè);如果大豆和玉米倒伏方向沒(méi)有規(guī)律,可提前將倒伏在玉米帶的大豆植株扶正或者移出玉米帶,先收大豆再收玉米。
 
  農(nóng)業(yè)農(nóng)村部農(nóng)業(yè)機(jī)械化總站
 
  農(nóng)業(yè)農(nóng)村部農(nóng)作物生產(chǎn)全程機(jī)械化專家指導(dǎo)組
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