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2020年新疆耕地質量等級情況公報

2021-03-23 09:52:07 來源:新疆維吾爾自治區農業農村廳 閱讀量:24396 評論

  【農機網 熱點關注】 以習近平新時代中國特色社會主義思想為指導,落實“藏糧于地、藏糧于技”戰略,新疆維吾爾自治區農業農村廳依據《耕地質量調查監測與評價辦法》(農業部令2016年第2號)和《耕地質量等級》(GB/T33469-2016)國家標準,組織完成新疆耕地質量等級調查評價工作。評價以新疆7863.43萬畝耕地為基數,將全疆耕地土壤圖、土地利用現狀圖、行政區劃圖疊加形成的圖斑為評價單元,在全國耕地評價因子總集中,選取立地條件、剖面性狀、耕層理化性狀、養分狀況、土壤管理和土壤健康狀況等方面的評價指標對耕地質量進行綜合評價,完成了新疆耕地質量等級劃分。現將結果公布如下:
 
  一、新疆耕地質量總體情況
 
  新疆耕地按質量等級由高到低依次劃分為一至十等,平均等級為5.11等,比上年有所提升。其中,評價為一至三等的耕地面積為2157.73萬畝,占耕地總面積的27.44%。這部分耕地以潮土、草甸土和灌淤土為主,主要分布在平原中階和平原低階,基礎地力較高,灌溉能力基本為滿足和充分滿足,基本不存在障礙因素。
 
  評價為四至六等的耕地面積為3326.23萬畝,占耕地總面積的42.30%。這部分耕地以潮土、草甸土和棕鈣土為主,主要分布在平原低階和平原中階,灌溉能力基本為滿足和基本滿足,農田基礎設施建設具備一定基礎,鹽堿、障礙層次為主要障礙因素。
 
  評價為七至十等的耕地面積為2379.47萬畝,占耕地總面積的30.26%。這部分耕地以草甸土、棕鈣土和潮土為主,主要分布在平原中階和平原高階,灌溉能力基本為基本滿足和不滿足,基礎地力相對較差,農田基礎設施建設不完善,干旱灌溉型、障礙層次、鹽堿、瘠薄和沙化等障礙因素較為突出。
 
  2020年新疆耕地質量等級比例分布圖見圖1。
 

圖1 新疆耕地質量等級比例分布圖
 
  二、分區概述
 
  按照中國綜合農業區劃,兼顧土壤類型、農業生產條件、行政區劃等因素,將新疆耕地劃分為南疆農牧林區和北疆農牧林區2個二級農業區。耕地質量等級情況分述如下:
 
  (一)南疆農牧林區 包括和田地區、吐魯番市、阿克蘇地區、喀什地區、巴音郭楞蒙古自治州、哈密南、克孜勒蘇柯爾克孜自治州等,總耕地面積3473.54萬畝,約占全疆評價耕地面積的44.17%。南疆農牧林區耕地質量平均等級為5.22等。
 
  評價為一至三等的高等級耕地面積為872.55萬畝,占該二級區耕地面積的25.12%。主要分布在阿克蘇地區、喀什地區和巴音郭楞蒙古自治州。這部分耕地以灌淤土、潮土和草甸土為主,無明顯障礙因素,土壤養分含量較高,農田基礎設施完善,農作物產量高。
 
  評價為四至六等的中等級耕地面積為1572.13萬畝,占該二級區耕地面積的45.26%。主要分布在喀什地區、阿克蘇地區和巴音郭楞蒙古自治州。這部分耕地以灌淤土、草甸土和潮土為主,耕地基礎地力中等,該等級部分耕地受鹽堿、障礙層次等障礙因素影響導致供肥性能較差,今后應重點加強農田基礎設施建設。
 
  評價為七至十等的低等級耕地面積為1028.86萬畝,占該二級區耕地面積的29.62%。主要分布在阿克蘇地區、喀什地區和巴音郭楞蒙古自治州。這部分耕地以草甸土、潮土和灌淤土為主,耕地基礎地力相對較差,水資源及農田基礎設施缺乏,障礙因素以鹽堿和障礙層次較為突出,生產力水平低。今后應大力加強灌排設施建設,探索應用生物有機肥、土壤改良劑來提高地力。
 
圖2南疆農牧林區耕地質量等級比例分布圖
 
  (二)北疆農牧林區 包括阿勒泰地區、塔城地區、伊犁哈薩克自治州、克拉瑪依市、昌吉回族自治州、哈密北、烏魯木齊市、博爾塔拉蒙古自治州等,總耕地面積4389.89萬畝,占全疆評價耕地總面積的55.83%。北疆農牧林區耕地質量平均等級為5.02等。
 
  評價為一至三等的高等級耕地面積為1285.36萬畝,占該二級區耕地面積的29.28%。主要分布在伊犁哈薩克自治州、昌吉回族自治州和塔城地區。這部分耕地以性狀良好的潮土和草甸土為主,沒有明顯的障礙因素,土壤供肥能力較強,作物產量較高。
 
  評價為四至六等的中等級耕地面積為1753.76萬畝,占該二級區耕地面積的39.95%,是全疆中等級耕地比例高的區域。主要分布在塔城地區、昌吉回族自治州和伊犁哈薩克自治州。這部分耕地以棕鈣土和潮土為主。該部分耕地重要障礙因素為障礙層次和鹽堿,灌溉條件一般,導致土壤供肥性能不能充分發揮,是部分經濟作物增產潛力較大的區域。
 
  評價為七至十等的低等級耕地面積為1350.77萬畝,占該二級區耕地面積的30.77%。主要分布在塔城地區、昌吉回族自治州和伊犁哈薩克自治州。這部分耕地以棕鈣土、灰漠土和栗鈣土為主。該部分耕地障礙因素以障礙層次、瘠薄等較為突出且灌溉設施缺乏。今后應重點開展農田基礎設施建設,改良土壤,提高灌溉效率。
 
圖3北疆農牧林區耕地質量等級比例分布圖
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