生态学杂志2012，Vol.31Issue(2)：254-260,7.
不同退化阶段高寒草甸土壤化学计量特征
Soil stoichiometry characteristics of alpine meadow at its different degradation stages
摘要
Abstract
To clarify the soil stoichiometry characteristics of alpine meadow at its different degradation stages, the native Kobresia meadow, mildly degraded meadow, and seriously degraded sandy meadow were selected to measure their soil organic carbon ( SOC ) , total nitrogen ( N) , total phosphorous (P) , and total potassium (K) contents at different soil depths. With the degradation of alpine meadow, the SOC, N, P, K, C : N, C : P, C : K, N : P, N : K, and P : K in 0-100 cm profiles presently a decreasing trend, and SOC was most sensitive to the degradation, followed by total N, P, and K. The SOC and N in top (0-20 cm) soil could be used as the most sensitive indicators for the degradation degree of alpine meadow. The vertical distribution of SOC, N, P, and K differed with the degradation stage of the alpine meadow. For native Kobresia meadow and mildly degraded meadow, the SOC ,N,P,K,C:N,C:P,C:K,N; P, N : K, and P : K in 0-40 cm soil layer decreased sharply with soil depth, but those in 40-100 cm soil layer had a slow decrease and tended to be stable; for seriously degraded sandy meadow, these stoichiometry characteristics remained unchanged with soil depth.关键词
高寒草甸/退化/化学计量特征/垂直分布Key words
alpine meadow/degradation/stoichiometry characteristics/vertical distribution.分类
农业科技引用本文复制引用
罗亚勇,张宇,张静辉,卡召加,尚伦宇,王少影..不同退化阶段高寒草甸土壤化学计量特征[J].生态学杂志,2012,31(2):254-260,7.基金项目
中国科学院寒区旱区环境与工程研究所青年人才成长基金项目(Y184B01001)、国家重点基础研究发展计划项目(2011CB952002)和公益类行业专项(GYHY201106022)和国家自然科学基金项目(40975008)资助. （Y184B01001）
