文献类型： 外文期刊
作者： An Shao-Shan 2 ; Huang Yi-Mei 3 ; Zheng Fen-Li 1 ; Yang Jian-Guo 4 ;
作者机构： 1.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China
2.Minist Water Resources, Yangling 712100, Peoples R China
3.NW A&F Univ, Yangling 712100, Peoples R China
4.China Agr Univ, Coll Water Conservancy & Civil Engn, Beijing 100083, Peoples R China
5.Ningxia Acad Agr & Forestry Sci, Inst Agr Resources & Environm, Yinchuan 750002, Peoples R China
关键词： organic matter;soil property;clay;water stability;natural revegetation;aggregate characteristics
期刊名称：PEDOSPHERE （ 影响因子：3.911； 五年影响因子：4.814 ）
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收录情况： SCI
摘要： Field investigations and laboratory analysis were conducted to study the characteristics of soil water-stable aggregates during vegetation rehabilitation in typical grassland soils of the hilly-gullied loess area. The relationship between water-stable aggregates and other soil properties was analyzed using canonical correlation analysis and principal component analysis. The results show that during the natural revegetation, the aggregates > 5 mm dominated and constituted between 50% and 80% of the total soil water-stable aggregates in most of the soil layers. The 2-5 mm aggregate class was the second main component. The mean value of water-stable aggregates > 5 mm within the 0-2 m soil profile under different plant communities decreased in the following order: Stipa grandis > Stipa bungeana Trin. > Artemisia sacrorum Ledeb. > Thymus mongolicus Ronn. > Hierochloe odorata (L.) Beauv. Clay, organic matter, and total N were the key factors that influenced the water stability of the aggregates. Total N and organic matter were the main factors that affected the water stability of the aggregates > 5 mm and 0.5-1 mm in size. The contents of Fe2O3, Al2O3, and physical clay (< 0.01 mm) were the main factors which affected the water stability of the 1-2 and 0.25-0.5 mm aggregates.
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