Aggregate Characteristics During Natural revegetation on the Loess Plateau

AN Shao-Shan; HUANG Yi-Mei; ZHENG Fen-Li; YANG Jian-Guo

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Aggregate Characteristics During Natural revegetation on the Loess Plateau

机译：黄土高原天然植被恢复过程中的骨料特征

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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.

机译：通过野外调查和实验室分析，研究了黄土丘陵沟壑区典型草地土壤植被恢复过程中土壤水稳性团聚体的特征。使用规范相关分析和主成分分析法分析了水稳性团聚体与其他土壤性质之间的关系。结果表明，在自然植被恢复过程中，> 5 mm的团聚体占主导地位，在大多数土壤层中占总土壤水稳性团聚体的50％至80％。 2-5毫米骨料等级是第二个主要组成部分。在不同植物群落下0-2 m土壤剖面内，耐水团聚体的平均值> 5 mm依次降低：大针茅>针叶木针茅。 > cro蒿。 >百里香蒙。 >香Hi（L.）Beauv。粘土，有机质和总氮是影响骨料水稳定性的关键因素。总氮和有机质是影响尺寸> 5 mm和0.5-1 mm的骨料水稳定性的主要因素。 Fe2O3，Al2O3和物理粘土（<0.01 mm）的含量是影响1-2和0.25-0.5 mm骨料水稳定性的主要因素。

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《土壤圈（英文版）》 |2008年第6期|809-816|共8页
作者
AN Shao-Shan; HUANG Yi-Mei; ZHENG Fen-Li; YANG Jian-Guo;
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作者单位

State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conse-rvation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100,China;

Northwest Agriculture and Forestry University, Yangling 712100,China;

Northwest Agriculture and Forestry University, Yangling 712100,China;

State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conse-rvation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100,China;

Northwest Agriculture and Forestry University, Yangling 712100,China;

College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083,China;

Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002,China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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中图分类农业基础科学;
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Aggregate Characteristics During Natural revegetation on the Loess Plateau

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