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大豆玉米帶狀復(fù)合種植全程機械化技術(shù)指引

2023-03-29 15:16:40 來源:農(nóng)業(yè)機械化總站 閱讀量:15084 評論

導(dǎo)讀:采取“封閉為主、封定結(jié)合”的雜草防除策略,即播后苗前土壤封閉處理和苗后定向莖葉噴藥相結(jié)合,以苗前封閉除草為主,減輕苗后除草壓力。

  【農(nóng)機網(wǎng) 熱點關(guān)注】針對黃淮海、西北、西南和長江中下游地區(qū)4+2和3+2種植模式,制定大豆玉米帶狀復(fù)合種植全程機械化技術(shù)指引,以復(fù)合種植機械化播種、植保、收獲為重點作業(yè)環(huán)節(jié),提出復(fù)合種植全程機械化基本原則、技術(shù)路線、技術(shù)要點、機具配套等,形成一套比較完備的機械化工藝流程和裝備體系,加快推進復(fù)合種植全程機械化。
 
  一、基本原則
 
  一是堅持因地制宜,優(yōu)選高產(chǎn)模式。根據(jù)當?shù)卮蠖褂衩追N植農(nóng)藝、耕地條件以及機具配備綜合選擇種植模式,優(yōu)先選擇4+2、3+2等利于穩(wěn)產(chǎn)增產(chǎn)的種植模式,根據(jù)農(nóng)藝要求確定適宜的株距、行距、帶間距、播種深度、施肥量等作業(yè)參數(shù)。
 
  二是堅持統(tǒng)籌兼顧,做好生產(chǎn)規(guī)劃。播種作業(yè)前,應(yīng)考慮大豆、玉米生育期,確定播種、收獲作業(yè)先后順序,做好生產(chǎn)布局和作業(yè)路徑規(guī)劃,合理確定地頭作物,方便機具轉(zhuǎn)彎調(diào)頭。
 
  三是堅持造改結(jié)合,優(yōu)化機具配套。應(yīng)依據(jù)生產(chǎn)條件和種植模式選擇適用機具裝備。按照“以機適藝”原則,播種環(huán)節(jié)優(yōu)先選用復(fù)合種植專用播種機,提高作業(yè)質(zhì)量;收獲環(huán)節(jié)兼用現(xiàn)有谷物聯(lián)合收割機調(diào)整改造,實現(xiàn)“一機多用”,但應(yīng)確保改造到位,滿足復(fù)合種植作業(yè)質(zhì)量要求。
 
  四是堅持規(guī)范生產(chǎn),提高作業(yè)精度。在播種、植保、收獲等關(guān)鍵環(huán)節(jié)宜配置北斗導(dǎo)航輔助駕駛系統(tǒng),提高作業(yè)精準度和前后環(huán)節(jié)作業(yè)匹配度,實現(xiàn)精準播種、分帶植保、對行收獲,并減輕機手勞動強度。
 
  二、技術(shù)路線
 
  大豆玉米帶狀復(fù)合種植全程機械化技術(shù)通過機械化精量播種、苗期綜合管理、減損收獲等關(guān)鍵技術(shù)配套,降低勞動強度,提高作業(yè)效率,實現(xiàn)高產(chǎn)高效。技術(shù)路線如下:
 
圖1 大豆玉米帶狀復(fù)合種植全程機械化技術(shù)路線圖
 
  三、采用北斗導(dǎo)航輔助駕駛系統(tǒng)應(yīng)用要求
 
  (一)系統(tǒng)選擇
 
  根據(jù)當?shù)囟ㄎ换尽⒕W(wǎng)絡(luò)信號、地塊坡度、擴展性等因素,優(yōu)先選擇具有作業(yè)線共享功能的北斗導(dǎo)航輔助駕駛系統(tǒng),保證前后生產(chǎn)環(huán)節(jié)、工序的銜接精度;優(yōu)先選擇支持移動、聯(lián)通和電信“三網(wǎng)合一”的網(wǎng)絡(luò)差分方式,在網(wǎng)絡(luò)信號無法覆蓋的區(qū)域,可選用星基增強差分方式或者增配移動電臺基站。在地面坡度較大時,優(yōu)先選擇雙天線定位等具備姿態(tài)和地形補償功能的輔助駕駛系統(tǒng)??筛鶕?jù)實際需要,選擇配置了輔助駕駛系統(tǒng)的精量播種、變量施肥、精準噴霧等功能的機具裝備。
 
  (二)安裝與調(diào)試
 
  應(yīng)嚴格按照使用說明書進行安裝。安裝時,如拖拉機無駕駛室,應(yīng)采取防護措施,避免車載顯控終端暴曬或淋雨。安裝完成后,應(yīng)按照使用說明書設(shè)置參數(shù),并選擇合適地塊進行作業(yè)調(diào)試,確保機組直線作業(yè)和銜接行精度符合作業(yè)要求。
 
  (三)規(guī)范作業(yè)
 
  1.檢驗系統(tǒng)狀態(tài)。系統(tǒng)開機后,應(yīng)按照使用說明書檢查、確認系統(tǒng)各部件狀態(tài),如出現(xiàn)故障提示,應(yīng)首先進行故障排除。
 
  2.確認差分定位。查看車載顯控終端,確認系統(tǒng)處于定位差分狀態(tài)。如未處于差分定位狀態(tài),可檢查網(wǎng)絡(luò)信號,選擇合適的網(wǎng)絡(luò)基站或電臺基站。
 
  3.設(shè)置作業(yè)參數(shù)。根據(jù)實際情況,設(shè)置作業(yè)幅寬。應(yīng)確保播種機掛接在中間位置,如出現(xiàn)少量偏移,可設(shè)置機具偏移參數(shù)進行校正。
 
  4.設(shè)置導(dǎo)航線。機組行駛至地頭,車頭朝向作業(yè)的方向,設(shè)置A點;手動駕駛機組行駛至地尾,設(shè)置B點,完成AB直線的設(shè)置。如重復(fù)或繼續(xù)同一地塊作業(yè),可以直接導(dǎo)入AB線。在植保、收獲作業(yè)環(huán)節(jié),可直接使用共享導(dǎo)航線功能,導(dǎo)入前一個作業(yè)環(huán)節(jié)的導(dǎo)航線。
 
  5.檢查作業(yè)精度。啟動輔助駕駛功能,往復(fù)作業(yè)2—3次,停車查驗作業(yè)精度是否符合作業(yè)要求,如誤差較大,應(yīng)按照使用說明進行調(diào)試,作業(yè)精度符合要求后,方可進行大面積作業(yè)。
 
  6.安全規(guī)范作業(yè)。輔助駕駛作業(yè)過程中,應(yīng)隨時注意觀察車載顯控終端提示信息,出現(xiàn)作業(yè)精度不符合要求或故障提示,應(yīng)及時解除輔助駕駛功能、停車檢查排除問題或故障。
 
  四、機械化播種
 
  (一)品種選擇
 
  根據(jù)資源稟賦、種植制度、水肥條件等因素,選擇適宜的品種搭配,大豆應(yīng)選用耐蔭、耐密、抗倒、底莢高度在10厘米以上的品種,玉米應(yīng)選用株型緊湊、適宜密植和機械化收獲的高產(chǎn)品種。多熟制地區(qū)應(yīng)注意與前后茬的合理搭配,實現(xiàn)周年均衡優(yōu)質(zhì)高產(chǎn)。
 
  (二)種床準備
 
  可根據(jù)當?shù)卮蠖?、玉米常?guī)種植方式的整地措施進行種床準備。一年多熟地區(qū),前茬作物留茬高度≤10厘米,秸稈粉碎長度≤10厘米,大豆播種帶應(yīng)進行滅茬,或選用帶滅茬功能的播種機進行滅茬播種。黃淮海地區(qū)小麥收獲后若墑情適宜,應(yīng)立即搶墑播種,若墑情較差,應(yīng)先造墑再播種。
 
  (三)適期播種
 
  具體播種時間根據(jù)當?shù)貧夂驐l件、前茬作物收獲時間確定。西南地區(qū)先播玉米,適播期為3月下旬—4月上旬;后播大豆,適播期為6月上中旬。黃淮海地區(qū)玉米大豆可同時播種,適播期為6月15—25日。西北地區(qū)玉米大豆可于5月上旬同期播種。
 
  (四)機具選擇
 
  根據(jù)所選種植模式、機具情況確定相匹配的播種機組,行距、間距、株距、播種深度、施肥量等應(yīng)調(diào)整到位,滿足當?shù)剞r(nóng)藝要求。如大豆、玉米同期播種,優(yōu)先選用與一個生產(chǎn)單元相匹配的大豆玉米帶狀復(fù)合種植專用播種機;如大豆、玉米錯期播種,可選用單一大豆播種機和玉米播種機分步作業(yè)。黃淮海地區(qū)前茬秸稈覆蓋地表,宜選用大豆帶滅茬淺旋播種機,減少晾種和擁堵現(xiàn)象;西北地區(qū),根據(jù)灌溉條件和鋪膜要求,宜選用具有鋪管覆膜功能的播種機;長江中下游地區(qū),根據(jù)土壤情況,宜選用具有開溝起壟功能的播種機;西南地區(qū),應(yīng)選用具有密植分控和施肥功能的播種機。
 
  (五)規(guī)范作業(yè)
 
  大面積作業(yè)前,應(yīng)進行試播,查驗播種作業(yè)質(zhì)量、調(diào)整機具參數(shù),播種深度和鎮(zhèn)壓強度應(yīng)根據(jù)土壤墑情變化適時調(diào)整。作業(yè)時,應(yīng)注意適當降低作業(yè)速度,提高小穴距條件下播種作業(yè)質(zhì)量,一般勺輪式排種器作業(yè)速度為3—4公里/小時,指夾式為5—6 公里/小時,氣力式為6—8公里/小時,同時注意保持銜接行距均勻一致。
 
  (六)技術(shù)要點
 
  1. 黃淮海地區(qū)。大豆播種平均種植密度為8000—10000株/畝。玉米播種調(diào)整行距接近40厘米,調(diào)整株距至10—12厘米,平均種植密度為4500—5000株/畝,并增大玉米單位面積施肥量,確保玉米單株施肥量與凈作相當。
 
  2. 西北地區(qū)。該地區(qū)覆膜打孔播種機應(yīng)用廣泛,應(yīng)注意適當降低作業(yè)速度,防止地膜撕扯,保證兩種作物種子均能準確入穴。大豆可采用一穴2—3粒的播種方式,平均種植密度為11000—12000株/畝。玉米調(diào)整行距接近40厘米,通過改變鴨嘴數(shù)量將株距調(diào)整至10—12厘米左右,平均種植密度為4500—5000株/畝,并增大玉米單位面積施肥量,確保玉米單株施肥量與凈作相當。
 
  3. 西南和長江中下游地區(qū)。該區(qū)域大豆玉米間套作應(yīng)用面積較大。大豆播種可在2行玉米播種機上增加1—2個播種單體,株距調(diào)整至9—10厘米,平均種植密度為9000—10000株/畝。玉米播種調(diào)整行距接近40厘米,株距調(diào)整至12—15厘米,平均種植密度為4000—4500株/畝,并增大玉米單位面積施肥量,確保玉米單株施肥量與凈作相當。
 
  五、機械化田間管理
 
  (一)機械化除(控)草
 
  采取“封閉為主、封定結(jié)合”的雜草防除策略,即播后苗前土壤封閉處理和苗后定向莖葉噴藥相結(jié)合,以苗前封閉除草為主,減輕苗后除草壓力。
 
  1. 封閉除草技術(shù)要點。播后苗前(播后2天內(nèi))根據(jù)不同地塊雜草類型選擇適宜的除草劑,使用噴桿噴霧機進行土壤封閉噴霧,噴灑均勻,在地表形成藥膜。
 
  2. 苗期除草技術(shù)要點。大豆和玉米分別為雙子葉作物和單子葉作物,苗期除草應(yīng)做好物理隔離,避免產(chǎn)生藥害。優(yōu)先選用自走式雙系統(tǒng)分帶噴桿噴霧機等專用植保機械,其次選用經(jīng)調(diào)整改造的自走式雙系統(tǒng)分帶噴桿噴霧機,實現(xiàn)玉米、大豆分帶同步植保作業(yè);也可選用加裝隔板(隔簾、防護罩)的普通自走式噴桿噴霧機,實現(xiàn)大豆、玉米分帶分步植保作業(yè)。苗后玉米3—5葉期、大豆2—3片三出復(fù)葉期,根據(jù)雜草情況對大豆玉米分帶定向噴施除草劑。應(yīng)選擇無風天氣,并壓低噴頭,防止除草劑飄移到鄰近行的大豆帶或玉米帶。
 
  (二)病蟲防治
 
  播種前應(yīng)對大豆玉米種子進行拌種或包衣處理,防治地下害蟲和土傳病害。大豆玉米全生育期,根據(jù)病蟲預(yù)測或發(fā)生情況,選用相應(yīng)藥劑,可采用物理、生物與化學防治相結(jié)合的方法,優(yōu)先選用雙系統(tǒng)分條帶噴桿噴霧機實現(xiàn)精準對行、對靶噴霧作業(yè),減少浪費和污染。
 
  (三)化學控旺
 
  大豆在5片復(fù)葉與初花期,玉米在7—10片展開葉,根據(jù)株高情況,采用自走式雙系統(tǒng)分帶噴桿噴霧機分別對大豆玉米定向噴施生長調(diào)節(jié)劑,控制株高,增強抗倒能力。
 
  (四)水肥管理
 
  大豆玉米生長期應(yīng)根據(jù)田間土壤水分和生長情況加強水肥管理,有條件的地方可采用水肥一體化滴灌方式精準灌溉施肥,確保密植玉米生長后期有足夠的水肥營養(yǎng)。遇澇應(yīng)及時排水,排澇后應(yīng)及時在大豆帶和玉米帶之間采用施肥機追肥。
 
  六、機械化收獲
 
  (一)確定適宜收獲期
 
  1. 大豆適宜收獲期。一般在黃熟期后至完熟期之間,此時大豆葉片脫落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,用手搖動植株會發(fā)出清脆響聲。大豆收獲作業(yè)應(yīng)該選擇早、晚露水消退時間段進行,避免產(chǎn)生“泥花臉”;應(yīng)避開中午高溫時段,減少收獲炸莢損失。
 
  2. 玉米適宜收獲期。一般在完熟期,此時玉米植株的中、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?;?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)確定收獲方式及適宜機型
 
  1. 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)。作業(yè)時,先選用適宜的窄幅寬大豆收獲機進行大豆收獲作業(yè),再選用2行玉米收獲機或常規(guī)玉米收獲機進行玉米收獲作業(yè)。大豆收獲機機型應(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。一般情況,4+2種植模式應(yīng)選擇1.3米≤作業(yè)幅寬<2米、整機寬度<2.1米的大豆收獲機,3+2種植模式應(yīng)選擇1米≤作業(yè)幅寬<1.7米、整機寬度<1.8米的大豆收獲機。窄幅寬大豆收獲機宜裝配浮式仿形割臺,割臺離地高度小于5厘米,實現(xiàn)貼地收獲作業(yè)。玉米收獲時,大豆已收獲完畢,玉米收獲機機型選擇范圍較大,可選用2行玉米收獲機對行收獲;也可選用當?shù)爻R?guī)玉米收獲機減幅作業(yè)。
 
  2. 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)套作方式和長江流域、華北地區(qū)。作業(yè)時,先選用適宜的2行玉米收獲機進行玉米收獲作業(yè),再進行大豆收獲作業(yè)。玉米收獲機機型應(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。4+2、3+2種植模式應(yīng)選擇輪胎(履帶)外側(cè)間距<1.5米、整機寬度<1.6米的2行玉米收獲機;也可選用高地隙跨帶玉米收獲機,先收兩帶4行玉米。大豆收獲時,玉米已收獲完畢,機型選擇范圍較大,可選用幅寬與大豆帶寬相匹配的大豆收獲機,幅寬應(yīng)大于大豆帶寬40厘米以上;也可選用當?shù)爻R?guī)大豆收獲機減幅作業(yè)。
 
  3. 大豆玉米分步同時收獲方式。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)。作業(yè)時,對大豆、玉米收獲順序沒有特殊要求,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和玉米收獲機前后布局,輪流收獲大豆和玉米,依次作業(yè)。因作業(yè)時一側(cè)作物已經(jīng)收獲,對機型外廓尺寸、輪距等要求降低,可根據(jù)大豆種植幅寬和玉米行數(shù)選用幅寬匹配的機型,也可選用常規(guī)收獲機減幅作業(yè)。
 
  (三)減損收獲作業(yè)
 
  1.科學規(guī)劃作業(yè)路線。對于大豆、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,方便機具轉(zhuǎn)彎調(diào)頭,實現(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。對于大豆、玉米同期收獲地塊,應(yīng)先收地頭作物,方便機具轉(zhuǎn)彎調(diào)頭,實現(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和玉米收獲機依次作業(yè)。
 
  2.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。對于大豆先收方式,大豆收獲作業(yè)速度應(yīng)低于傳統(tǒng)凈作,一般控制在3—6公里/小時,發(fā)動機轉(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—8公里/小時。玉米收獲時,兩側(cè)大豆已收獲完,可按正常作業(yè)速度行駛。對于玉米先收方式,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—5公里/小時。如采用行距大于55厘米的玉米收獲機,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,應(yīng)降低作業(yè)速度,避免損失率增大。大豆收獲時,兩側(cè)玉米已收獲完,可按正常作業(yè)速度行駛。
 
  3.駕駛操作規(guī)范。大豆收獲時,應(yīng)以不漏收豆莢為原則,控制好大豆收獲機割臺高度,盡量放低割臺,將割茬降至4—8厘米,避免漏收低節(jié)位豆莢。作業(yè)時,應(yīng)將大豆帶保持在割臺中間位置,并直線行駛,避免漏收或碾壓、夾帶玉米植株。應(yīng)及時停車觀察糧倉中大豆清潔度和尾篩排出秸稈夾帶損失率,并適時調(diào)整風機風量。玉米收獲時,應(yīng)嚴格對行收獲,保證割道與玉米帶平行,且收獲機輪胎(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。玉米先收時,應(yīng)確保玉米秸稈不拋灑在大豆帶,提高大豆收獲機通過性和作業(yè)清潔度。
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