齐雁冰,常庆瑞,刘梦云,刘京,陈涛.荒漠化土壤对人工植被恢复工程的响应[J].干旱地区农业研究,2011,29(3):180~185
荒漠化土壤对人工植被恢复工程的响应
Characteristics of desertified soil in desertification reversing process by artificial vegetation
  
DOI：10.7606/j.issn.1000-7601.2011.03.34
中文关键词:  人工植被恢复工程  荒漠化  土壤性质  逆转过程
英文关键词:artificial vegetation restoration  desertification  soil characteristics  reversal process
基金项目:人工植被恢复工程;荒漠化;土壤性质;逆转过程 基金资助：教育部博士点基金(20090204120036)；国家自然科学基金(30872073)
作者单位
齐雁冰 College of Resources and Environment， Northwest A & F University, Yangling， Shaanxi 712100，China 
常庆瑞 College of Resources and Environment， Northwest A & F University, Yangling， Shaanxi 712100，China 
刘梦云 College of Resources and Environment， Northwest A & F University, Yangling， Shaanxi 712100，China 
刘京 College of Resources and Environment， Northwest A & F University, Yangling， Shaanxi 712100，China 
陈涛 College of Resources and Environment， Northwest A & F University, Yangling， Shaanxi 712100，China 
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中文摘要:
      人工植被恢复是荒漠化土壤逆转的主要途径,通过对青海省沙珠玉治沙站人工植被恢复工程下荒漠化土壤逆转过程中土体构型、土壤质地、元素组成和理化性质的分析,研究了荒漠化土壤对人工植被恢复工程的响应。结果表明,人工植被恢复工程对荒漠化土壤具有很好的改良作用,受人工植被影响,土体构型逐渐复杂,出露地表的母质层逐渐被淋溶层和淀积层覆盖,结皮层逐渐形成,土壤中细粒物质在表层逐渐富集,其中砂粒平均含量减少152.47 g/kg,粘粒平均含量仅增加105.64 g/kg。土壤有机质和养分含量及CEC逐渐提高,结皮层有机碳含量可达10.41 g/kg,全氮达0.95 g/kg,碱解氮达84.7 mg/kg,速效钾达290.0 mg/kg,速效磷达11.6 mg/kg,随着荒漠化的逆转,土体中SiO2含量明显降低,降幅达100 g/kg以上,Al、Fe、Ca、Mg、Ti和Mn等成分不断升高,升高幅度一般在30%60%之间,土壤保水保肥性能增强,生产力不断提高。研究区土地逆转过程可划分为:风沙侵蚀为主、风沙蚀积平衡、风沙沉积为主和土壤形成发育4个阶段。
英文摘要:
      Artificial vegetation restoration is one of the most common measures to desertification control. Soil me-chanical composition， physical features, chemical properties and total composition of chemical elements of soils are mea-sured for studying the reversal desertification in Shazhuyu desert control site. The results indicated that artificial vegeta-tion restoration had better impact on the improvemtn of desertified soil. Influenced by vegetation, the soil body configura-tion became more complex gradually，parent material horizon was gradually covered by the leached and illuvial horizon, and sand fixing fommed . The soil suface enriched gradually in fine material，in which the average sand content decreased by 152.47 g/kg，while the average content of clay increased by only 105.64 g/ kg. Soil organic matter, nutrient and CEC increased gradually. The organic carbon content of sandfixing was up to 10.41 g/kg, total nitrogen up to 0.95 g/kg，available nitrogen ψp to 84.7 mg/kg，K ψp to 290.0 mg/ kg, and available P up to 11. 6 mg/ kg. With the reversal of desertification, soil SiO2 was decreased significantly by 100 g/kg，while Al, Fe，Ca，Mg, Ti and Mn were increased gradually by 30% to 60%. Soil performance of preserving mosture and fertility strengthened. Soil reversal desetification process can be divided into four stages : wind blown erosion, sand erosion and deposit balance，sand deposit and soil formation.
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