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2022年“三秋”機械化生產(chǎn)技術(shù)指導(dǎo)意見
2022-09-20
09:56:58
來源:農(nóng)業(yè)機械化管理司 閱讀量:16184
評論
導(dǎo)讀:針對機收減損、“雙晚”技術(shù)、倒伏作物收獲、過濕地塊作業(yè)等情況,特制定2022年“三秋”機械化生產(chǎn)技術(shù)指導(dǎo)意見,供各地參考。
【農(nóng)機網(wǎng) 熱點關(guān)注】當(dāng)前,秋糧生產(chǎn)進入關(guān)鍵期,為切實做好“三秋”機械化生產(chǎn)工作,確保顆粒歸倉、應(yīng)種盡種,針對機收減損、“雙晚”技術(shù)、倒伏作物收獲、過濕地塊作業(yè)等情況,特制定2022年“三秋”機械化生產(chǎn)技術(shù)指導(dǎo)意見,供各地參考。
一、機收減損技術(shù)
(一)選擇適宜收獲期
適期收獲可增加粒重、減少損失、提高產(chǎn)量和品質(zhì)。作業(yè)前,應(yīng)準(zhǔn)確判斷確定適收期,過早或過遲收獲會增加損失率和破碎率。如遇自然災(zāi)害等特殊情況,可適當(dāng)提前收獲。
(二)選擇適宜收獲方式和機具
收獲水稻時,一般選用全喂入履帶式
谷物聯(lián)合收割機,優(yōu)先采用大喂入量機型,提高作業(yè)效率和質(zhì)量;收獲難脫粒品種(脫粒強度大于180g)或倒伏水稻時,可選用半喂入履帶式谷物
聯(lián)合收割機。收獲玉米時,如籽粒含水率在25%以下,優(yōu)先選用玉米籽粒聯(lián)合
收獲機一次性完成摘穗和脫粒作業(yè),宜選用縱軸流機型;如不具備籽粒收獲條件,可選用摘穗型玉米收獲機進行果穗收獲,待果穗籽粒含水率降低或進入冬季果穗結(jié)凍后再脫粒。收獲大豆時,優(yōu)先選用配置撓性割臺的大豆聯(lián)合收獲機;如無專用大豆聯(lián)合收獲機,可通過調(diào)整改造谷物聯(lián)合收割機并更換撓性割臺方式實現(xiàn)。
(三)做好機具檢查調(diào)試
作業(yè)前,依據(jù)產(chǎn)品使用說明書對機具進行一次全面檢查與保養(yǎng),確保機具技術(shù)狀態(tài)良好;應(yīng)根據(jù)地塊條件(大小、坡度等)、作物條件(品種特性、成熟程度、產(chǎn)量水平、籽粒含水率、秸稈水分含量等)、環(huán)境天氣、農(nóng)藝要求(留茬高度、秸稈粉碎程度等)等對收獲機作業(yè)參數(shù)進行調(diào)整,并進行試收,試收作業(yè)距離一般為30—50m。試收后,應(yīng)按照作業(yè)質(zhì)量標(biāo)準(zhǔn)檢驗作業(yè)效果,如作業(yè)效果欠佳,應(yīng)再次對收獲機進行調(diào)整和試收檢驗,直至作業(yè)質(zhì)量優(yōu)于標(biāo)準(zhǔn),并達到滿意的作業(yè)效果。
(四)機收作業(yè)注意事項
1.提前規(guī)劃行走路線
玉米收獲時,機具行進方向應(yīng)盡量保證與種植行平行,避免與種植行垂直方向收獲;水稻、大豆收獲作業(yè)一般采用向心回轉(zhuǎn)法。作業(yè)前,應(yīng)提前查看地塊,對地塊中的溝渠、田埂、通道等予以平整,并將水井、墳頭、電桿拉線、樹樁等不明顯障礙進行標(biāo)記,并據(jù)此合理規(guī)劃路線,科學(xué)避讓。作業(yè)時,應(yīng)根據(jù)地塊形狀,依次進行作業(yè);如有必要,可提前開出收割道。
2.合理控制作業(yè)速度
應(yīng)根據(jù)機型特點、作物產(chǎn)量、植株密度、自然高度、干濕程度、留茬高度等因素選擇合理的作業(yè)速度;當(dāng)作物密、植株大、產(chǎn)量高、地塊起伏不平、早晚及雨后作物濕度大時,應(yīng)適當(dāng)降低作業(yè)速度;作業(yè)時,一般先低速收獲,然后逐步提高至正常作業(yè)速度;嚴(yán)禁使用行走檔位進行收獲作業(yè);低速行駛作業(yè)時,不能降低發(fā)動機轉(zhuǎn)速。
3.科學(xué)規(guī)范駕駛操作
作業(yè)時,應(yīng)通過調(diào)整作業(yè)速度和幅寬實時控制喂入量,使機具在額定負荷下工作,降低夾帶損失,避免發(fā)生堵塞故障;應(yīng)注意幅寬銜接,避免相鄰兩個作業(yè)帶之間出現(xiàn)漏收損失。地頭轉(zhuǎn)彎時,應(yīng)停止作業(yè),采用倒車法轉(zhuǎn)彎或兜圈法直角轉(zhuǎn)彎,直線行駛后再開始作業(yè)。應(yīng)注意地頭、邊角和障礙物附近作物收獲情況,做到應(yīng)收盡收,減少損失。
(五)及時烘干
收獲后的水稻稻谷、玉米籽粒含水率如未達到儲藏要求,應(yīng)及時烘干。烘干作業(yè)應(yīng)遵循就近原則,提前聯(lián)系烘干地點,統(tǒng)籌安排,合理拉運,隨收隨烘,避免濕糧長期堆放。
水稻宜采用低溫烘干,可選用循環(huán)式或連續(xù)式烘干機。收獲的玉米籽粒,宜選用連續(xù)式烘干機;收獲的玉米果穗,應(yīng)先離地儲存,通風(fēng)降水,待籽粒含水率降至25%以下或進入冬季果穗結(jié)凍后,再脫粒并烘干。
烘干前,應(yīng)進行初清,含雜率≤2%,不得有長莖稈、麻袋繩、塑料薄膜等雜物;應(yīng)測定谷物初始含水率,同一批烘干的谷物水分不均度應(yīng)≤3%。烘干時,玉米籽粒(不包括制種玉米籽粒)溫度一般不超過50℃,最高不超過55℃,應(yīng)控制一次降水幅度不大于18%或平均干燥速率不大于2.5%/h,防止玉米裂紋率增大;水稻籽粒溫度一般不超過40℃,最高不超過43℃,應(yīng)控制干燥速率不大于1.5%/h,防止爆腰率增大。烘干后,谷物色澤氣味應(yīng)無明顯變化,無熱損傷粒、焦糊粒。
二、“雙晚”機械化配套技術(shù)
“雙晚”是指小麥、玉米一年兩熟區(qū)玉米適期晚收、小麥適期晚播技術(shù)模式,可有效利用光、熱、水、氣等自然資源,增加玉米粒重,避免小麥冬前旺長,實現(xiàn)周年高效高產(chǎn)。
(一)玉米晚收機械化配套技術(shù)
玉米晚收,灌漿更充分,成熟度更佳,籽粒含水率降低,果穗籽粒堅實,有利于降低機收損失率,收獲機一般不需要過多調(diào)整。如采用果穗收獲方式,玉米苞葉(俗稱“玉米皮”)含水率降低,與剝皮輥摩擦力減小,有利于減少果穗損傷(俗稱“啃屁股”現(xiàn)象),提高剝凈率,降低損失率;作業(yè)時應(yīng)注意調(diào)整壓送器與剝皮輥間距,并適當(dāng)調(diào)整每對剝皮輥之間的壓緊度。如采用籽粒收獲方式,“晚收”可緩解黃淮海地區(qū)收獲時籽粒含水率過高問題,有利于提高脫凈率、降低籽粒破碎率和損失率;作業(yè)時,應(yīng)注意調(diào)節(jié)脫粒滾筒轉(zhuǎn)速和脫粒間隙。
此外,玉米晚收,植株含水量降低,秸稈硬度降低、韌性增強,植株倒伏風(fēng)險增大,應(yīng)注意加強防范。如已發(fā)生倒伏,參照倒伏玉米收獲技術(shù)開展作業(yè)。玉米植株秸稈韌性增強,機械化秸稈還田作業(yè)難度增加,機收作業(yè)時,應(yīng)注意秸稈還田質(zhì)量,如不達標(biāo),應(yīng)降低收獲作業(yè)速度,或收獲后進行二次秸稈粉碎還田作業(yè),為耕整地環(huán)節(jié)和小麥播種環(huán)節(jié)創(chuàng)造良好條件。
(二)小麥晚播機械化配套技術(shù)
為保證晚播小麥形成足夠的群體,可根據(jù)當(dāng)?shù)毓鉄豳Y源、品種特性、栽培技術(shù)等條件適當(dāng)增加單位面積播種量。播種作業(yè)時,根據(jù)不同機型,可通過多檔變速箱檔位手柄調(diào)整排種軸至合適轉(zhuǎn)速方式,或通過增加排種盒外槽輪工作長度方式(松開種箱調(diào)節(jié)器鎖緊螺母,轉(zhuǎn)動手柄拉動芯軸,調(diào)整播種槽床長度)達到所需播種量;必要時,可通過更換排種槽輪進行調(diào)整。
為保證晚播小麥養(yǎng)分需求,可按照與土壤地力和目標(biāo)產(chǎn)量相匹配的原則適當(dāng)增加單位面積施肥量。播種機排肥裝置結(jié)構(gòu)一般與播種裝置結(jié)構(gòu)差異不大,可根據(jù)不同機型,參照播種量調(diào)整方式達到所需施肥量。
調(diào)整后應(yīng)進行試播,確保作業(yè)質(zhì)量達標(biāo)。作業(yè)時,應(yīng)下種均勻,深淺一致,不漏播,不重播;播后應(yīng)及時鎮(zhèn)壓,確保苗全、苗勻、苗壯。
三、倒伏作物收獲技術(shù)
(一)收獲倒伏水稻
1.選擇適用機具
收獲倒伏水稻時,半喂入谷物聯(lián)合收割機作業(yè)效果一般優(yōu)于全喂入谷物聯(lián)合收割機;如嚴(yán)重倒伏且倒伏方向一致,優(yōu)先選用半喂入機型;如倒伏不嚴(yán)重且倒伏方向交錯,優(yōu)先選用全喂入機型。選用全喂入機型收獲倒伏角大于60度水稻時,應(yīng)加裝“伏倒器”和“防倒伏彈齒”裝置,并調(diào)整撥禾輪與割刀的相對位置,調(diào)整彈齒角度后傾,將割臺降至適宜高度。
2.作業(yè)注意事項
倒伏角小于45度時,對收獲作業(yè)影響有限,一般不進行特殊處理。倒伏角大于45度時,如選用半喂入機型,應(yīng)采用順向收獲或側(cè)向收獲方式;如選用全喂入機型,應(yīng)采用逆向收獲或側(cè)向收獲方式。作業(yè)時,應(yīng)降低作業(yè)速度,減少作業(yè)幅寬;應(yīng)將檔位保持低速檔,采用最大油門或中大油門;應(yīng)根據(jù)作物情況實時調(diào)整撥禾輪高度和速度;應(yīng)經(jīng)常檢查作業(yè)質(zhì)量,注意觀察凹板篩和清選篩,根據(jù)收獲效果及時調(diào)整機具參數(shù);應(yīng)及時清除割刀和喂入筒入口處堆積的泥土和秸稈,防止堵塞。
(二)收獲倒伏玉米
1.選擇適用機具
收獲倒伏玉米時,優(yōu)先選用割臺長度長、傾角小、分禾器尖能夠貼地作業(yè)的高性能玉米收獲機;也可在普通玉米收獲機割臺上加長分禾尖或加裝倒伏扶禾裝置,增加扶禾作業(yè)行程,并適當(dāng)減小割臺傾角。收獲嚴(yán)重倒伏(倒伏角大于60度)玉米時,在上述割臺調(diào)整改造基礎(chǔ)上,將鐵膠混合剝皮輥更換為全膠剝皮輥,防止鐵輥溝槽粘連泥土降低作業(yè)效果;將排雜輥改為浮動狀態(tài),加裝強力風(fēng)機,將喂入割臺的玉米整株有效排出;必要時,在割臺上加裝輔助撥禾輪或螺旋扶倒器,實現(xiàn)玉米植株強制喂入;玉米籽粒聯(lián)合收獲機還應(yīng)調(diào)整脫粒滾筒轉(zhuǎn)速和凹板間隙,避免過度揉搓,造成高水分籽粒破損。
2.作業(yè)注意事項
倒伏角小于45度時,對收獲作業(yè)影響有限,一般不進行特殊處理。倒伏角大于45度時,應(yīng)在對行收獲原則下,采用逆向收獲或側(cè)向收獲方式。作業(yè)時,應(yīng)減少機具負荷,通過降檔加油門方式勻速作業(yè),使喂入速度與各系統(tǒng)作業(yè)能力相協(xié)調(diào),防止倒伏后玉米籽粒濕度較高、果穗粘連泥土和倒伏玉米植株不規(guī)則喂入等原因造成的堵塞;應(yīng)根據(jù)倒伏情況,實時調(diào)整收獲機分禾器尖與地面的距離,盡量扶起倒伏玉米;應(yīng)及時清理割臺,防止秸稈和泥土在割臺堆積。為方便機收作業(yè)后人工撿拾,應(yīng)斷開秸稈還田裝置動力或?qū)⒃撗b置提升至最高位置,防止漏收玉米果穗被打碎;如需秸稈粉碎還田,可在收獲作業(yè)后進行二次秸稈粉碎還田作業(yè)。
(三)收獲倒伏大豆
1.選擇適用機具
收獲倒伏大豆時,應(yīng)選用配置撓性割臺的大豆聯(lián)合收獲機,實現(xiàn)割臺貼地作業(yè)。收獲嚴(yán)重倒伏(倒伏角大于60度)大豆時,應(yīng)加裝“伏倒器”和“防倒伏彈齒”裝置。
2.作業(yè)注意事項
收獲倒伏大豆時,應(yīng)盡量降低割臺高度,保證較低位置的大豆能夠進入割臺。倒伏角小于45度時,對收獲作業(yè)影響有限,一般不進行特殊處理;倒伏角大于45度時,應(yīng)采用逆向收獲或側(cè)向收獲方式。其他作業(yè)注意事項可參照倒伏水稻收獲。
四、過濕地塊機械化作業(yè)技術(shù)
(一)創(chuàng)造良好地塊條件
機械化作業(yè)前,應(yīng)盡力減少地塊積水量,為機具進田作業(yè)創(chuàng)造良好條件。對于田間積水嚴(yán)重的地塊,應(yīng)采用排灌設(shè)備及時抽排積水;對于已無法抽排的積水地塊,應(yīng)疏通溝渠排水,開挖深溝瀝水。
(二)機具的選擇與調(diào)整改造
過濕地塊機械化作業(yè)時,輪式農(nóng)業(yè)機械易發(fā)生陷機,應(yīng)優(yōu)先選用履帶式農(nóng)業(yè)機械;如不具備條件,可將輪式農(nóng)業(yè)機械改造為半履帶式農(nóng)業(yè)機械(將驅(qū)動輪更換為三角履帶),或加裝一對驅(qū)動輪胎,增加接地面積,減少接地壓力。應(yīng)急搶收過濕地塊玉米時,可通過調(diào)整改造履帶式谷物聯(lián)合收獲機進行作業(yè),注意調(diào)整滾筒轉(zhuǎn)速、凹版間隙等工作參數(shù),并更換玉米專用割臺或在割臺加裝接穗板。應(yīng)急搶種小麥時,宜采用多功能復(fù)式作業(yè)機具或免耕播種機,減少作業(yè)環(huán)節(jié),避免重復(fù)進地破壞土壤;播種機可增加覆土彌合疏松表土裝置。
采用履帶式農(nóng)業(yè)機械作業(yè)時,應(yīng)根據(jù)地塊情況對履帶張緊程度進行調(diào)整,泥濘地塊適當(dāng)調(diào)緊一些,干燥地塊適當(dāng)調(diào)松,以提高機具通過能力、減少履帶磨損。
(三)作業(yè)技術(shù)要點
作業(yè)前,仔細觀察地塊泥濘程度,針對性地采取作業(yè)措施。作業(yè)時,應(yīng)降低作業(yè)速度,避免急進、急退;應(yīng)緩慢轉(zhuǎn)彎,避免在同一位置多次轉(zhuǎn)彎調(diào)頭;如遇機具打滑、下陷、傾斜等情況,應(yīng)及時停車處理。收獲作業(yè)時,應(yīng)及時卸糧,盡量減輕整機重量。收獲作業(yè)同步開展秸稈還田作業(yè)時,應(yīng)注意觀察秸稈還田作業(yè)質(zhì)量,如不滿足生產(chǎn)需求可適時開展二次秸稈還田作業(yè)。小麥播種時,應(yīng)盡量將前茬作物秸稈離田處理;應(yīng)堅持播期服從墑情,如實際播種期遲于最晚適宜播期,應(yīng)根據(jù)種植經(jīng)驗視晚播天數(shù)適當(dāng)加大播量;作業(yè)時,應(yīng)注意機具行走對播種作業(yè)質(zhì)量影響;應(yīng)適當(dāng)淺播,行走速度不宜超過5公里/小時。
農(nóng)業(yè)農(nóng)村部農(nóng)業(yè)機械化管理司
農(nóng)業(yè)農(nóng)村部農(nóng)業(yè)機械化總站
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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