| 黄土高原生态系统演替进程中土壤有机质和pH值变化规律 |
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| 引用本文： | 杨世琦,杨正礼. 黄土高原生态系统演替进程中土壤有机质和pH值变化规律[J]. 水土保持研究, 2008, 15(2): 159-163 |
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| 作者姓名： | 杨世琦 杨正礼 |
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| 作者单位： | 中国农业科学院, 农业环境与可持续发展研究所, 北京, 100081 |
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| 基金项目： | 中央级公益性科研院所基本科研业务费专项资金资助项目，土壤有机质提升试点补助项目 |
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| 摘 要： | 通过对黄土高原生态系统演替进程中土壤有机质和pH值变化进行分析,结果表明:在同一演替系列中,随演替进程的推移,土壤中有机质增加,pH值减小;在不同地段上,演替高级阶段土壤的有机质高于低级阶段,pH值正好相反;人为间断干扰的生态系统土壤有机质下降,pH值升高;人为持续干扰的亚顶级生态系统土壤有机质明显降低,PH值明显升高.
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| 关 键 词： | 黄土高原 生态系统演替 有机质 pH值 |
The Changes of Soil Organic Matter and pH in the Course of Ecosystem Succession in the Loess Plateau |
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| YANG Shi-qi,YANG Zheng-li. The Changes of Soil Organic Matter and pH in the Course of Ecosystem Succession in the Loess Plateau[J]. Research of Soil and Water Conservation, 2008, 15(2): 159-163 |
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| Authors: | YANG Shi-qi YANG Zheng-li |
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| Affiliation: | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China |
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| Abstract: | The soil organic matter and pH value were analyzed in the course of ecosystem succession in the Loess Plateau.The results are:the soil organic matter increases and pH value decrease by succession process in the same sere;the soil organic matte is higher in advanced stage than early stage,and pH value is lower in advanced stage than early stage;the soil organic matter decreases and pH value increase because of interrupted jamming,and the soil organic matter decreases distinctly and pH value increases distinctly in sub-climax ecosystem. |
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| Keywords: | the Loess Plateau ecosystem succession organic matter pH value |
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