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創(chuàng)新保護性耕作技術(shù)模式 實現(xiàn)黑土地地力提升及產(chǎn)能保障

2023-11-21 09:40:14 來源:遼寧省昌圖縣現(xiàn)代農(nóng)業(yè)發(fā)展服務(wù)中心 閱讀量:17262 評論

  【農(nóng)機網(wǎng) 地方農(nóng)機】昌圖縣地處遼寧省最北部,全縣現(xiàn)有耕地489萬畝,地處玉米種植黃金地帶的昌圖縣年均種植玉米面積超406萬畝,針對多年來存在的土壤板結(jié),犁底層變淺和土壤有機質(zhì)含量減少等問題,通過試驗研究確立了適合本地區(qū)的黑土地保護性耕作全程機械化作業(yè)模式。
 
  一、基本情況
 
  昌圖縣地處遼寧省最北部,松遼平原南端,東北與吉林省四平市、梨樹縣、雙遼市相毗鄰,西北與內(nèi)蒙古自治區(qū)的科爾沁左翼后旗相連,南接開原市,西接法庫縣,位于東經(jīng)123°32′-124°26′和北緯42°23′-43°29′之間,隸屬遼寧省鐵嶺市。昌圖縣總面積4317平方公里,轄33個鎮(zhèn)場,共計425個行政村,是一個以農(nóng)業(yè)人口為主、農(nóng)業(yè)占主導(dǎo)產(chǎn)業(yè)的農(nóng)業(yè)大縣。全縣現(xiàn)有耕地489萬畝,地處玉米種植黃金地帶的昌圖縣年均種植玉米面積超406萬畝,占全縣總耕地面積的80%以上。多年的傳統(tǒng)耕作,已經(jīng)嚴(yán)重影響到了耕地的“健康”,特別是對黑土地的破壞。過度的開墾和種植,導(dǎo)致耕地耕層變淺、犁底層增厚、耕地的蓄水蓄養(yǎng)能力不斷下降,加之嚴(yán)重的水土流失,使得土壤有機質(zhì)“收”和“支”嚴(yán)重失衡,土壤有機質(zhì)含量由開墾之初的4%-6%下降到目前1.8%-2%。昌圖縣創(chuàng)新了黑土地保護性耕作全程機械化技術(shù),通過作物秸稈覆蓋還田、配施有機肥,減少黑土地侵蝕、增加土壤有機質(zhì)含量,保護并修復(fù)黑土地生態(tài)環(huán)境,獲得良好的生態(tài)、社會和經(jīng)濟效益。昌圖縣地處棕壤帶,還有少量草甸土、風(fēng)沙土、黑鈣土、水稻土、沼澤土,6個土類、12個亞類、25個土屬。昌圖是全國重點商品糧基地縣,從2003年到2014年昌圖縣連續(xù)12年被農(nóng)業(yè)部評為糧食生產(chǎn)先進縣。
 
  昌圖縣農(nóng)機發(fā)展服務(wù)中心是由原昌圖縣農(nóng)業(yè)機械化技術(shù)推廣服務(wù)站與農(nóng)業(yè)機械化學(xué)校合并后,設(shè)立在昌圖縣現(xiàn)代農(nóng)業(yè)發(fā)展服務(wù)中心的下屬分中心,是財政全額撥款的公益一類事業(yè)單位,現(xiàn)有工作人員16人,其中高級工程師2人、工程師10人。我單位肩負(fù)著全國玉米生產(chǎn)大縣的重任,保護和修復(fù)昌圖縣黑土地生態(tài)迫在眉睫。在農(nóng)業(yè)機械化專業(yè)正高級工程師張軍等專家團隊的帶領(lǐng)下,昌圖縣農(nóng)機發(fā)展服務(wù)中心開展了黑土地保護性耕作機械化技術(shù)的研究與推廣。
 
  二、主要做法
 
  1、典型示范,產(chǎn)量引領(lǐng)
 
  保護性耕作示范區(qū)覆蓋全縣各鎮(zhèn),示范引領(lǐng)作用成效顯著;在全縣范圍內(nèi)選取有知名度高、有區(qū)域代表性和對黑土地保護性耕作技術(shù)有著情懷的農(nóng)業(yè)合作理事長進行合作,通過建立高標(biāo)準(zhǔn)的示范田帶動周邊農(nóng)戶效果極佳。經(jīng)過幾年的引領(lǐng)效應(yīng),分別設(shè)立了縣級面積1000畝以上、鄉(xiāng)級面積200-1000畝以上、村級面積50-200畝以上三個等級的高標(biāo)準(zhǔn)示范基地52個,其中縣級示范基地10個,鄉(xiāng)級示范基地20個,村級22個。
 
  2、“五良”體系支撐新模式,實現(xiàn)農(nóng)機與農(nóng)藝深度融合
 
  構(gòu)建了“良種、良機、良法、良制、良田”技術(shù)體系,支撐玉米秸稈覆蓋還田全程機械化。針對昌圖縣氣候條件,篩選適合本地區(qū)的玉米品種,為不同種植模式推薦適合的優(yōu)良品種;創(chuàng)新研發(fā)適合本地區(qū)的高效深松整地機具、條帶淺旋機具及苗期深松機具,優(yōu)化了種植模式,寬窄行平作模式具有代表性,配合高桿噴藥機、植保無人機,實現(xiàn)了病蟲草害精準(zhǔn)防控。探索出了適合昌圖地區(qū)的保護性耕作機械化技術(shù)模式,解決了均勻壟無法存放秸稈的實際問題。制定了最優(yōu)的機具配套方案和技術(shù)路線。通過大面積的推廣應(yīng)用,達到提高耕地土壤的蓄水和抗旱能力,減少土壤風(fēng)蝕、水蝕,增加土壤有機質(zhì)含量,改善土壤結(jié)構(gòu),恢復(fù)地力,從而逐步修復(fù)耕地自身的生態(tài)系統(tǒng),達到保護黑土地、實現(xiàn)農(nóng)業(yè)增產(chǎn)增效和農(nóng)業(yè)健康可持續(xù)發(fā)展的目標(biāo)。
 
  3、培訓(xùn)與現(xiàn)場展示結(jié)合,催生新亮點
 
  農(nóng)機發(fā)展服務(wù)中心積極開展保護性耕作農(nóng)機手培訓(xùn),2020年至2023年,共培訓(xùn)農(nóng)機手600名,培訓(xùn)新型職業(yè)農(nóng)民2000余人。開展“科技之冬”活動,培訓(xùn)種養(yǎng)合作社、家庭農(nóng)場、種養(yǎng)大戶3000人次;舉辦“農(nóng)技大篷車”直播欄目17期。為加快農(nóng)業(yè)技術(shù)推廣工作,促進科技推廣與成果的有效轉(zhuǎn)化,與中國科學(xué)院等院校合作,全縣建設(shè)農(nóng)業(yè)科技示范基地6個;黑土地保護性耕作創(chuàng)新種植模式,在全縣推廣“寬窄行、二比空”技術(shù)模式35.4萬畝,促進糧食產(chǎn)量穩(wěn)步提升。每年春季都組織農(nóng)機企業(yè)召開保護性耕作現(xiàn)場會,康達、德邦大為、雷沃、中科等主要生產(chǎn)廠家等新型機具悉數(shù)亮相,進行作業(yè)效果演示,組織全縣農(nóng)機合作社理事長到場進行機具選型。秋季組織保護性耕作有關(guān)單位開展籽粒收獲降損現(xiàn)場會。
 
  4、量身定制,個性化設(shè)計
 
  根據(jù)昌圖縣的地形地勢和氣候條件,為了解決播種質(zhì)量偏低問題,聯(lián)合中國科學(xué)院設(shè)計生產(chǎn)了1100臺套重型免耕機、條耕機、偏柱式深松機、苗期深松追肥機,這些高效的機具大大提高了保護性耕作的作業(yè)效率,做到了株距一致、播種深淺一致、鎮(zhèn)壓強度一致,確保出苗一致,保證了苗齊苗壯,旱澇保收。僅2022年在昌圖縣高標(biāo)準(zhǔn)示范基地引進各種機械280余臺套。哈工大等廠家為保護性耕作監(jiān)測作業(yè)面積和作業(yè)效果,改型設(shè)計了精度更高的衛(wèi)星導(dǎo)航設(shè)備,2022年在高標(biāo)準(zhǔn)示范基地安裝900多臺。
 
  三、取得成效
 
  1、成功構(gòu)建“政府+科研單位+合作社”協(xié)作網(wǎng)絡(luò)
 
  在政府積極倡導(dǎo)下,科研單位作為技術(shù)支撐部門,合作社作為實施主體,通過建立試驗示范基地,形成了以點帶面網(wǎng)絡(luò)化示范推廣體系。通過45個示范基地的示范引領(lǐng)和農(nóng)機推廣部門的大力推廣,2020年至2023年保護性耕作實施面積,在昌圖地區(qū)累計推廣實施約490萬畝次。其中:2020年推廣實施面積約110萬畝;2021年推廣實施面積約180萬畝;2022年推廣實施面積約200萬畝。總結(jié)了適合昌圖本地區(qū)的高產(chǎn)種植模式,形成了保護性耕作模式下的不等行距、等株距、增密度的“昌圖模式”。
 
  2、探索出適合本地區(qū)的保護性耕作機械化技術(shù)模式
 
  1)針對昌圖縣中部平原區(qū),寬窄行及二比空為核心的全量秸稈覆蓋保護性耕作技術(shù)模式;
 
  2)針對風(fēng)沙干旱區(qū),采用秸稈覆蓋技術(shù),水肥一體化技術(shù)應(yīng)用模式;
 
  3)針對養(yǎng)殖業(yè)發(fā)達地區(qū),應(yīng)用秸稈覆蓋與有機肥還田相結(jié)合應(yīng)用,實現(xiàn)“糞-稈”還田種養(yǎng)一體的保護性耕作技術(shù)模式。
 
  3、注重品種選擇
 
  通過連續(xù)3年的玉米品種試種篩選實驗,選定了適宜昌圖地區(qū)保護性耕作的耐密、抗倒伏、高產(chǎn)高效的玉米品種。
 
  4、掌握適宜的機械整地及播種方法
 
  摸索出了適宜秸稈覆蓋條件下的整地播種技術(shù)模式即“深松—淺耙—免耕播種”技術(shù)體系;
 
  5、提升地力效果顯著
 
  通過秸稈覆蓋還田、深松整地、免耕播種、精準(zhǔn)施肥技術(shù)的應(yīng)用,耕層逐年加深,抗旱耐澇能力明顯增強。土壤有機質(zhì)每年在提升,糧食產(chǎn)量每畝增產(chǎn)50公斤。
 
  四、經(jīng)驗啟示
 
  1、依托專業(yè)農(nóng)業(yè)經(jīng)營服務(wù)組織引領(lǐng)保護性耕作是正確的選擇。農(nóng)業(yè)經(jīng)營服務(wù)組織裝備優(yōu)良,操作技能高,便于組織和實施,經(jīng)濟實力雄厚,服務(wù)功能齊全,能夠滿足黑土地保護、保護性耕作的技術(shù)要求。
 
  2、土地流轉(zhuǎn)為保護性耕作技術(shù)示范創(chuàng)建了發(fā)展空間。土地集中連片,便于實行機械化、標(biāo)準(zhǔn)作業(yè),能夠按照科學(xué)的技術(shù)模式和工藝路線順利實施。
 
  3、典型帶動的作用效果明顯。各鎮(zhèn)場都有幾個典型新型農(nóng)業(yè)經(jīng)營主體,他們率先在自己經(jīng)營的土地上進行了示范,發(fā)揮了各種作業(yè)機械的最大效率,在他們的帶動下,周邊農(nóng)民提高了認(rèn)識,為今后實施保護性耕作奠定了基礎(chǔ)。
 
  4、技術(shù)創(chuàng)新為保護性耕作實施拓寬了渠道。通過借鑒外地經(jīng)驗和本地的試驗驗證,解決關(guān)鍵技術(shù)難題,為今后的實施工作增添了技術(shù)保障。
 
  5、一定要具有適用于本地區(qū)的增產(chǎn)增收的技術(shù)模式。產(chǎn)量的提升是最好的引領(lǐng)金牌,能夠起到不推自廣的作用。
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