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麥?zhǔn)占炯磳砼R，如何抓好機(jī)收減損、力爭顆粒歸倉？

2021-05-27 15:39:36 來源：農(nóng)機(jī)網(wǎng)整理發(fā)布 閱讀量：30659 評論

導(dǎo)讀：在一定區(qū)域內(nèi)，小麥品種及種植模式應(yīng)盡量規(guī)范一致，作物及田塊條件適于機(jī)械化收獲。機(jī)手應(yīng)提前檢查調(diào)試好機(jī)具，確定適宜收割期，執(zhí)行小麥機(jī)收作業(yè)質(zhì)量標(biāo)準(zhǔn)和操作規(guī)程，努力減少收獲環(huán)節(jié)損失。

　　【農(nóng)機(jī)網(wǎng) 熱點關(guān)注】 為貫徹落實習(xí)近平總書記關(guān)于“厲行節(jié)約、反對浪費”重要指示精神和2021年全國“三夏”小麥機(jī)收暨糧食作物機(jī)收減損工作視頻會議精神，強化“降低機(jī)收損耗就是增加糧食產(chǎn)量”意識，毫不放松抓好糧食生產(chǎn)，進(jìn)一步減少糧食機(jī)械化收獲損失，農(nóng)業(yè)農(nóng)村部農(nóng)業(yè)機(jī)械化司組織農(nóng)業(yè)農(nóng)村部農(nóng)業(yè)機(jī)械化總站和農(nóng)作物生產(chǎn)全程機(jī)械化推進(jìn)專家指導(dǎo)組修訂了玉米、水稻、小麥三大糧食作物機(jī)械化收獲減損技術(shù)指導(dǎo)意見并發(fā)布，要求各地加強作業(yè)質(zhì)量標(biāo)準(zhǔn)宣貫和技術(shù)培訓(xùn)指導(dǎo)，切實推進(jìn)糧食機(jī)收提質(zhì)減損工作，力爭“顆粒歸倉”，為保障國家糧食安全提供更有力的機(jī)械化支撐。
 
　　當(dāng)前，小麥?zhǔn)崭罴炯磳⒌絹?，《小麥機(jī)械化收獲減損技術(shù)指導(dǎo)意見》(以下簡稱《指導(dǎo)意見》)對機(jī)收作業(yè)質(zhì)量要求、機(jī)收減損措施等作了詳細(xì)指導(dǎo)。
 
　　本技術(shù)指導(dǎo)意見適用于全喂入聯(lián)合收割機(jī)的小麥?zhǔn)斋@作業(yè)。在一定區(qū)域內(nèi)，小麥品種及種植模式應(yīng)盡量規(guī)范一致，作物及田塊條件適于機(jī)械化收獲。機(jī)手應(yīng)提前檢查調(diào)試好機(jī)具，確定適宜收割期，執(zhí)行小麥機(jī)收作業(yè)質(zhì)量標(biāo)準(zhǔn)和操作規(guī)程，努力減少收獲環(huán)節(jié)損失。
 

 

 

　　在具體的減損措施上，《指導(dǎo)意見》指出應(yīng)選擇適當(dāng)?shù)淖鳂I(yè)參數(shù)，并根據(jù)自然條件和作物條件的不同及時對機(jī)具進(jìn)行調(diào)整，使聯(lián)合收割機(jī)保持良好的工作狀態(tài)，減少機(jī)收損失，提高作業(yè)質(zhì)量。
 
　　(一)選擇作業(yè)行走路線
 
　　聯(lián)合收割機(jī)作業(yè)一般可采取順時針向心回轉(zhuǎn)、逆時針向心回轉(zhuǎn)、梭形收割三種行走方法。在具體作業(yè)時，機(jī)手應(yīng)根據(jù)地塊實際情況靈活選用。轉(zhuǎn)彎時應(yīng)停止收割，將割臺升起，采用倒車法轉(zhuǎn)彎或兜圈法直角轉(zhuǎn)彎，不要邊割邊轉(zhuǎn)彎，以防因分禾器、行走輪或履帶壓倒未割麥子，造成漏割損失。
 
　　(二)選擇作業(yè)速度
 
　　根據(jù)聯(lián)合收割機(jī)自身喂入量、小麥產(chǎn)量、自然高度、干濕程度等因素選擇合理的作業(yè)速度。作業(yè)過程中應(yīng)盡量保持發(fā)動機(jī)在額定轉(zhuǎn)速下運轉(zhuǎn)。通常情況下，采用正常作業(yè)速度進(jìn)行收割，盡量避免急加速或急減速。當(dāng)小麥稠密、植株大、產(chǎn)量高、早晚及雨后作物濕度大時，應(yīng)適當(dāng)降低作業(yè)速度。
 
　　(三)調(diào)整作業(yè)幅寬
 
　　在負(fù)荷允許的情況下，控制好作業(yè)速度，盡量滿幅或接近滿幅工作，保證作物喂入均勻，防止喂入量過大，影響脫粒質(zhì)量。當(dāng)小麥產(chǎn)量高、濕度大或者留茬高度過低時，以低速作業(yè)仍超載時，適當(dāng)減小割幅，一般減少到80%，以保證小麥的收割質(zhì)量。
 
　　(四)保持合適的留茬高度
 
　　割茬高度應(yīng)根據(jù)小麥的高度和地塊的平整情況而定，一般以5—15厘米為宜。割茬過高，由于小麥高低不一或機(jī)車過田埂時割臺上下波動，易造成部分小麥漏割，同時，撥禾輪的撥禾推禾作用減弱，易造成落地?fù)p失。在保證正常收割的情況下，割茬盡量低些，但最低不得小于5厘米，以免切割泥土，加快切割器磨損。
 
　　(五)調(diào)整撥禾輪速度和位置
 
　　調(diào)整撥禾輪的轉(zhuǎn)速，使撥禾輪線速度為聯(lián)合收割機(jī)前進(jìn)速度的1.1—1.2倍，不宜過高。撥禾輪高低位置應(yīng)使撥禾板作用在被切割作物2/3處為宜，其前后位置應(yīng)視作物密度和倒伏程度而定，當(dāng)作物植株密度大并且倒伏時，適當(dāng)前移，以增強扶禾能力。撥禾輪轉(zhuǎn)速過高、位置偏高或偏前，都易增加穗頭籽粒脫落，使作業(yè)損失增加。
 
　　(六)調(diào)整脫粒、清選等工作部件
 
　　脫粒滾筒的轉(zhuǎn)速、脫粒間隙和導(dǎo)流板角度的大小，是影響小麥脫凈率、破碎率的重要因素。在保證破碎率不超標(biāo)的前提下，可通過適當(dāng)提高脫粒滾筒的轉(zhuǎn)速，減小滾筒與凹板之間的間隙，正確調(diào)整入口與出口間隙之比(應(yīng)為4∶1)等措施，提高脫凈率，減少脫粒損失。清選損失和含雜率是對立的,調(diào)整中要統(tǒng)籌考慮。在保證含雜率不超標(biāo)的前提下，可通過適當(dāng)減小風(fēng)扇風(fēng)量、調(diào)大篩子的開度及提高尾篩位置等,減少清選損失。作業(yè)中要經(jīng)常檢查逐稿器機(jī)箱內(nèi)秸稈堵塞情況，及時清理，軸流滾筒可適當(dāng)減小喂入量和提高滾筒轉(zhuǎn)速,以減少分離損失。對于清選結(jié)構(gòu)上有排草擋板的，在含雜、損失較高時，可通過調(diào)整排草板上下高度減少損失。
 
　　(七)收割倒伏作物
 
　　適當(dāng)降低割茬，以減少漏割；撥禾輪適當(dāng)前移，撥禾彈齒后傾15—30度，或者安裝專用的扶禾器，以增強扶禾作用。倒伏較嚴(yán)重的作物，采取逆倒伏方向收獲、降低作業(yè)速度或減少喂入量等措施。
 
　　(八)收割過熟作物
 
　　小麥過度成熟時，莖稈過干易折斷、麥粒易脫落，脫粒后碎莖稈增加易引起清選困難，收割時應(yīng)適當(dāng)調(diào)低撥禾輪轉(zhuǎn)速，防止撥禾輪板擊打麥穗造成掉粒損失，同時降低作業(yè)速度，適當(dāng)調(diào)整清選篩開度，也可安排在早晨或傍晚莖稈韌性較大時收割。
 
　　(九)規(guī)范作業(yè)操作
 
　　作業(yè)時應(yīng)根據(jù)作物品種、高度、產(chǎn)量、成熟程度及秸稈含水率等情況來選擇作業(yè)擋位，用作業(yè)速度、割茬高度及工作幅寬來調(diào)整喂入量，使機(jī)器在額定負(fù)荷下工作，盡量降低夾帶損失，避免發(fā)生堵塞故障。要經(jīng)常檢查凹版篩和清選篩的篩面，防止被泥土或潮濕物堵死造成糧食損失，如有堵塞要及時清理。
 
　　(十)在線監(jiān)測
 
　　如有條件，可在收割機(jī)上裝配損失率、含雜率、破碎率在線監(jiān)測裝置，駕駛員根據(jù)在線監(jiān)測裝置提示的相關(guān)指標(biāo)、曲線，適時調(diào)整作業(yè)速度、喂入量、留茬高度等作業(yè)狀態(tài)參數(shù)，得到并保持損失率、含雜率、破碎率較理想的作業(yè)狀態(tài)。
 
　　此外，《指導(dǎo)意見》還指出，機(jī)手、種植戶和從事收獲質(zhì)量監(jiān)督的鄉(xiāng)鎮(zhèn)農(nóng)機(jī)管理人員應(yīng)經(jīng)過培訓(xùn)，掌握小麥品種、籽粒含水率、種植模式、收割地形等方面的知識，掌握收割機(jī)的正確使用、維護(hù)保養(yǎng)知識以及作業(yè)質(zhì)量標(biāo)準(zhǔn)要求。鼓勵種植戶與機(jī)手簽訂收獲作業(yè)損失協(xié)議，農(nóng)機(jī)管理人員可通過巡回檢查監(jiān)督作業(yè)損失等情況，并在損失偏大或出現(xiàn)其它不合乎要求情形時，要求機(jī)手調(diào)整，仍然不合要求的，應(yīng)更換作業(yè)機(jī)器。
 
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