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。
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 seres 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.
出处
《水土保持研究》
CSCD
北大核心
2008年第2期159-163,共5页
Research of Soil and Water Conservation
基金
中央级公益科研基金"农业环境演变及其修复研究"
土壤有机质提升试点补助(2007A002)
关键词
黄土高原
生态系统演替
有机质
PH值
the Loess Plateau
ecosystem successions organic matters pH value
