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黄土丘陵区植被恢复中土壤团聚体演变及其与土壤性质的关系
引用本文:安韶山,黄懿梅,李壁成,杨建国.黄土丘陵区植被恢复中土壤团聚体演变及其与土壤性质的关系[J].土壤通报,2006,37(1):45-50.
作者姓名:安韶山  黄懿梅  李壁成  杨建国
作者单位:1. 中国科学院,西北农林科技大学,水土保持研究所,陕西,杨凌,712100
2. 西北农林科技大学,资源环境学院,陕西,杨凌,712100
3. 中国农业大学,水利与土木工程学院,中国,北京,100083;宁夏农林科学院,农业资源与环境研究所,宁夏,银川,750002
基金项目:中国科学院资助项目;西北农林科技大学校科研和教改项目;国家科技攻关项目
摘    要:在野外调查与室内分析的基础上,对黄土丘陵区典型草原带植被自然恢复过程中土壤水稳性团聚体及其主要影响因子的演变规律进行了研究,并用通径分析法对二者的相互关系进行了定量分析。结果表明:随着植被演替,土壤中大粒级水稳性团聚体含量逐步增加,>5mm粒级团聚体在土壤团粒结构中占主导地位,含量占50%~80%。其次是5~2mm含量,占到10%~15%左右。不同群落之间>5mm团聚体含量在2m深土层加权平均值比较结果为:大羽茅群落>长芒草群落>铁杆蒿群落>百里香群落>香茅草群落,其中大羽茅群落是香茅草群落>5mm团聚体含量的近5倍,长芒草群落也是香茅草群落的近4倍左右。主要影响因子对团聚体直接作用系数的大小为:物理性粘粒>有机质>全氮>全铁>阳离子交换量>全量铝>游离铁>全磷>pH值>粘粒>碳酸钙。物理性粘粒、有机质和全氮是影响水稳性团聚体含量的主要因子。

关 键 词:土壤团聚体  土壤性质  通径分析  主成分分析
文章编号:0564-3945(2006)01-0045-06
修稿时间:2004年11月9日

Characteristics of Soil Water Stable Aggregates and Relationship with Soil Properties During Vegetation Rehablitation in a Loess Hilly Region
AN Shao-shan,HUANG Yi-mei,LI Bi-cheng,YANG Jian-guo.Characteristics of Soil Water Stable Aggregates and Relationship with Soil Properties During Vegetation Rehablitation in a Loess Hilly Region[J].Chinese Journal of Soil Science,2006,37(1):45-50.
Authors:AN Shao-shan  HUANG Yi-mei  LI Bi-cheng  YANG Jian-guo
Abstract:Based on the field investigation and lab analysis,we studied the characteristics of soil water-stable aggregates and soil properties during vegetation rehabilitation in typical grassland of hilly-gullied Loess area,and analyze the relationship between them by path analysis and main component analysis.The results show that: In terms of vegetation succession stages,the contents of big gravel soil water-stable aggregates increased,the >5mm aggregate is priority in different layers,about 50%-80%.The 5-2mm aggregate is the second main component.The mean values of >5mm aggregate in 2m layers show that Stipa gradiss.Community > Stipa bungana Trin Community > Artemisia sacrorum Ledeb community>Thymus mongolicus Ronn community>Hierochloe ordorata community.Physical clay,organic matter and total nitrogen are the key factors that influenced the total water-stable aggregates.
Keywords:Soil aggregates  Soil properties  Path analysis  Principal components analysis
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