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2024年度農(nóng)業(yè)主推技術(shù)——內(nèi)蒙古沿黃灌區(qū)鹽堿化耕地綜合改良與高效利用技術(shù)

2024-04-02 09:03:56 來源：內(nèi)蒙古自治區(qū)農(nóng)牧廳 閱讀量：13639 評論

導(dǎo)讀：鹽堿地是我國重要的土地后備資源和潛在的重要糧倉，內(nèi)蒙古自治區(qū)現(xiàn)有鹽堿地面積8489 萬畝，其中鹽堿化耕地1585.38萬畝。

　　【農(nóng)機網(wǎng) 科技創(chuàng)新】 一、技術(shù)概述
 
　　（一）技術(shù)基本情況
 
　　1.技術(shù)研發(fā)推廣背景
 
　　鹽堿地是我國重要的土地后備資源和潛在的重要糧倉，內(nèi)蒙古自治區(qū)現(xiàn)有鹽堿地面積8489 萬畝，其中鹽堿化耕地1585.38萬畝，僅沿黃灌區(qū)鹽堿化耕地面積742.70萬畝，占全區(qū)鹽堿化耕地面積的46.87%；且每年仍以15-20 萬畝速度遞增，土壤鹽堿化已成為內(nèi)蒙古沿黃灌區(qū)土地資源高效利用、農(nóng)業(yè)可持續(xù)發(fā)展和環(huán)境質(zhì)量改善的主要障礙因子，嚴重制約區(qū)域農(nóng)業(yè)經(jīng)濟和社會的可持續(xù)發(fā)展，迫切需要進行鹽堿地分區(qū)分類綜合改良技術(shù)集成與示范，對保護自治區(qū)耕地面積、提高糧食生產(chǎn)能力和糧食安全具有重要的戰(zhàn)略意義。2023年7月20日習(xí)近平主持召開中央財經(jīng)委員會第二次會議強調(diào)切實加強耕地保護，全力提升耕地質(zhì)量，充分挖掘鹽堿地綜合利用潛力，穩(wěn)步拓展農(nóng)業(yè)生產(chǎn)空間，提高農(nóng)業(yè)綜合生產(chǎn)能力。要全面摸清鹽堿地資源狀況，研究編制鹽堿地綜合利用總體規(guī)劃和專項實施方案，分區(qū)分類開展鹽堿耕地治理改良，因地制宜利用鹽堿地，向各類鹽堿地資源要食物，“以種適地”同“以地適種”相結(jié)合，加快選育耐鹽堿特色品種，大力推廣鹽堿地治理改良的有效做法，強化水源、資金等要素保障。黨的二十大報告把“推動黃河流域生態(tài)保護和高質(zhì)量發(fā)展”作為區(qū)域協(xié)調(diào)發(fā)展的重要內(nèi)容，就推動高質(zhì)量發(fā)展、促進人與自然和諧共生等提出明確要求，作出具體部署。
 
　　針對內(nèi)蒙古沿黃灌區(qū)鹽堿地分級分類技術(shù)體系尚未建立，分區(qū)分類改良技術(shù)及其效果不顯著；鹽堿地治理完全依賴黃河水漫灌洗鹽壓鹽，水分利用效率低；各種改良技術(shù)單一、參數(shù)模糊、標準化程度低以及相關(guān)技術(shù)綜合應(yīng)用有效斜街差、改良周期長、長效性差，嚴重影響區(qū)域農(nóng)業(yè)綠色高質(zhì)量發(fā)展?；诖耍谒Y源日趨緊缺和鹽堿化程度逐年加重的態(tài)勢下，通過多年多點的鹽堿地不同改良技術(shù)措施的控制試驗與階段性技術(shù)成果研究與示范，構(gòu)建和熟化了以鹽堿地改良與產(chǎn)能提升為核心的鹽堿地分級分類治理技術(shù)與集成應(yīng)用模式。
 
　　2.解決的主要問題
 
　　（1）鹽堿地分級分類技術(shù)體系尚未建立，分區(qū)分類改良技術(shù)及其效果不顯著；
 
　　（2）鹽堿地治理完全依賴黃河水畦灌洗鹽壓鹽，用水量大，水分利用效率低；
 
　　（3）不同類型/程度鹽堿地各種改良技術(shù)單一、參數(shù)模糊、標準化程度低；
 
　　（4）各種改良技術(shù)綜合應(yīng)用有效銜接差、見效慢、改良周期長、長效性差；
 
　　（5）綜合改良與高效利用的可持續(xù)性在生產(chǎn)實踐中仍未得到大面積推廣運用。
 
　　（二）技術(shù)示范推廣情況
 
　　“內(nèi)蒙古沿黃灌區(qū)鹽堿化耕地綜合改良與高效利用技術(shù)”，依托國家重點研發(fā)計劃、國家自然基金項目、內(nèi)蒙古自治區(qū)重大科技專項、內(nèi)蒙古自治區(qū)財政推廣示范、內(nèi)蒙古自治區(qū)農(nóng)牧業(yè)成果轉(zhuǎn)移轉(zhuǎn)化項目、內(nèi)蒙古科技計劃項目、“科技興蒙”等20多項各級各類科研項目的支持下，已在內(nèi)蒙古沿黃灌區(qū)呼和浩特市、包頭市、鄂爾多斯市、巴彥淖爾市等4個盟市托克托縣、土默特左旗、土默特右旗、達拉特旗、杭錦旗、準格爾旗、烏拉特前旗、五原縣、臨河區(qū)、杭錦后旗等10個旗縣進行大面積推廣示范，累計推廣270多萬畝，新增純收益6560萬元。
 
　　（三）提質(zhì)增效情況
 
　　“內(nèi)蒙古沿黃灌區(qū)鹽堿化耕地綜合改良與高效利用技術(shù)”，示范區(qū)土壤pH平均降低0.32-0.56個單位，全鹽含量降低25.66%-43.67%，水分利用效率提高17%-43%，畝均產(chǎn)量提高15%-47%；節(jié)水效率提升25%~47%、節(jié)肥效率提升 15%~50%、增產(chǎn)效果效率14%~249%。  輕度鹽堿化耕地改良技術(shù)模式：節(jié)水效率提高 25%～31%、有機質(zhì)含量提高 5%～14%、作物產(chǎn)量提高 13%～17%；中度鹽堿化耕地改良技術(shù)模式：節(jié)水效率提高 37%～47%、鹽分降低 12%～39%、作物產(chǎn)量提高 15%～37%；重度鹽堿地改良技術(shù)模式：節(jié)水效率提高 29%～36%、鹽分降低 10%～35%、作物產(chǎn)量提高 167%～249%。同時項目實施后為實現(xiàn)黃河流域鹽堿障礙消減、水土資源高效利用、農(nóng)業(yè)綠色發(fā)展、糧食安全保障提供了科技支撐與示范推廣樣板，對促進黃河流域生態(tài)保護與高質(zhì)量發(fā)展具有重要的作用。
 
　　（四）技術(shù)獲獎情況
 
　　1.2023年入選內(nèi)蒙古自治區(qū)農(nóng)牧業(yè)主推技術(shù)；
 
　　2.2021年入選第一屆全國博士后創(chuàng)新創(chuàng)業(yè)大賽：脫硫石膏資源和利用與鹽堿地治理技術(shù)開發(fā)與應(yīng)用；
 
　　3.2019年獲得內(nèi)蒙古自治區(qū)科技進步二等獎：河套灌區(qū)土壤鹽漬化特征及改良技術(shù)集成與應(yīng)用；
 
　　4.2020年獲得內(nèi)蒙古自治區(qū)農(nóng)牧業(yè)豐收二等獎：鹽堿化耕地改良技術(shù)集成示范。
 
　　二、技術(shù)要點
 
　　（一）技術(shù)組成
 
　　基于沿黃灌區(qū)不同區(qū)域鹽堿類型、程度復(fù)雜，土壤鹽分含量高、質(zhì)地黏重、耕層土壤脫鹽困難、地下水位高、土壤結(jié)構(gòu)差、有機質(zhì)及養(yǎng)分含量低、土壤次生鹽漬化嚴重等問題，研發(fā)出針對不同程度鹽堿地綜合治理技術(shù)：即以地力培育全耕層熟化與節(jié)水控肥增效為核心的輕度鹽堿化耕地治理技術(shù)；以灌排工程優(yōu)化與水肥鹽調(diào)控為核心，輔以改土培肥亞耕層熟化的中度鹽堿化耕地治理技術(shù)；以灌排配套與耐鹽適鹽作物鑒選為核心，配套農(nóng)藝、化學(xué)、生物等措施的重度鹽堿化耕地治理技術(shù)；構(gòu)建和熟化了以鹽堿化耕地改土培肥與產(chǎn)能提升為核心的分級分類治理集成技術(shù)模式，并取得了重大創(chuàng)新和突破。
 
　　（二）技術(shù)原理
 
　　1.基于土壤鹽分離子組成及各陽離子交換量的基礎(chǔ)上，結(jié)合土壤質(zhì)地和滲透性、團聚體等性狀檢測指標，提出了鹽堿地的分類、分級(程度)量化指標體系；
 
　　2.研發(fā)了田間原位速測裝置土壤改良快速施用脫硫石膏施用量技術(shù)；研制了鹽堿地用土壤疏松設(shè)備、開溝躲鹽播種、牧草種植施肥、起壟覆膜鋪滴灌帶一體機等專用耕作、播種、施肥機具設(shè)備。
 
　　（三）關(guān)鍵技術(shù)
 
　　1.氯化物硫酸鹽化土：以灌排工程配套水鹽調(diào)控技術(shù)為核心，輔以鹽生植物/耐鹽作物飼草、生物有機肥和秸稈深埋為一體的精準施策技術(shù)；
 
　　2.蘇打鹽化土：以增施石膏類土壤調(diào)理劑水鹽調(diào)控為技術(shù)核心，輔以耐堿作物/飼草、有機肥和秸稈還田為一體的精準施策技術(shù)；
 
　　3.鈉質(zhì)堿化土：以精準施用石膏類土壤調(diào)理劑化學(xué)降堿技術(shù)為核心，輔以耐堿作物飼草、有機肥、腐殖酸、秸稈還田及水鹽調(diào)控為一體的精準施策技術(shù)。
 
　　（四）技術(shù)要點
 
　　輕度鹽堿化耕地：春季整地施用腐熟農(nóng)家肥2 m3/畝～4 m3/畝，生物肥料100 kg/畝～300 kg/畝、商品有機肥100kg/畝～300 kg/畝；秋季作物收獲后將秸稈切割成8 cm～10 cm(撒施尿素8 kg/畝+腐熟劑2 kg/畝)，深翻20 cm～35 cm；作物關(guān)鍵時期滴灌增施微生物菌劑或改良劑1 kg/畝～2 kg/畝。中度鹽堿化耕地：春季整地施用腐熟農(nóng)家肥4 m3/畝～6 m3/畝、脫硫石膏土壤調(diào)理劑400 kg/畝～600 kg/畝、腐植酸型改良劑150 kg/畝～200 kg/畝；配套實施深松40 cm或粉壟50 cm～60 cm；秋季作物收獲后將秸稈切割成8 cm～10 cm(撒施尿素4kg/畝+腐熟劑2 kg/畝)，深翻20 cm～35 cm。重度鹽堿化耕地：在排灌配套的基礎(chǔ)上，配套“暗管排鹽”工程措施(砂壤 35～40 m、壤土25 m～35 m、黏壤土 20 m～25 m、黏土 15～20 m，最佳埋管深度 0.8 m～1.2 m)，春季整地施用腐熟農(nóng)家肥6 m3/畝～8 m3/畝、脫硫石膏土壤調(diào)理劑600 kg/畝～800 kg/畝、腐植酸型改良劑200 kg/畝～400 kg/畝，摻明沙20 t/畝，深松40 cm、粉壟50 cm～60 cm，并采用開溝躲鹽或沙穴水膜種植。
 
　　（五）技術(shù)模式
 
　　以地力培育全耕層熟化與節(jié)水控肥微生物強化為核心的輕度鹽堿地改良技術(shù)；以灌排工程優(yōu)化與水鹽精準調(diào)控為核心，輔以改土培肥亞耕層熟化的中度鹽堿地改良技術(shù)模式；以耐鹽適鹽作物鑒選與灌排配套為核心，配套農(nóng)藝(開溝躲鹽播種、起壟覆膜鋪、覆沙用存水)、化學(xué)(土壤調(diào)理劑)、生物(微生物菌劑、生物肥料)等措施的重度鹽堿地改良技術(shù)模式。
 
　　三、適宜區(qū)域
 
　　本項技術(shù)適宜于內(nèi)蒙古沿黃灌區(qū)或沿黃流域同類型的鹽堿化耕地綜合利用或新開墾鹽堿地的改良區(qū)域。

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