我国北方草原沙漠化过程中土壤碳、氮变化规律研究

应用生态学报 ›› 2004, Vol. ›› Issue (9): 1604-1606.

我国北方草原沙漠化过程中土壤碳、氮变化规律研究

刘颖茹^1,2, 杨持¹, 朱志梅¹, 刘美玲¹

1. 内蒙古大学生态与环境科学系, 呼和浩特 010021;
2. 中国科学院地理科学与资源研究所, 北京 100101

收稿日期:2003-07-28 修回日期:2004-01-09
通讯作者: 刘颖茹,女,1976年生,博士生,主要从事草地生态学和生态修复方面的研究,发表论文3篇.杨持,E-mail:Yangchi@mail.imu.edu.cn
基金资助:
国家重点基础研究发展规划资助项目(G2000048704)

Soil C and N dynamics during desertification of grassland in Northern China

LIU Yingru^1,2, YANG Chi¹, ZHU Zhimei¹, LIU Meiling ¹

1. Ecology and Environment Department of Inner Mongolia University, Huhehaote 010021, China;
2. Institute of Geographic Sciences and Natural Research, Chinese Academy of Sciences, Beijing 100101, China

Received:2003-07-28 Revised:2004-01-09

摘要/Abstract

摘要： 对内蒙古锡林郭勒盟多伦县境内75个样点土壤质地、全碳、全氮的测定和地上植被状况分析结果表明,草原沙漠化过程不同阶段的变化体现在土壤氮、碳、粘粒含量的有规律变化,土壤氮、碳含量减少、质地变粗;土壤氮、碳含量与粘粒含量间呈显著相关性,氮含量与粘粒含量间的相关系数(0.901)分别大于碳、氮含量间的相关系数(0.627)和碳含量与粘粒含量间的相关系数(0.642).土壤中粘粒含量显著减少,土壤中氮元素的衰减比碳元素明显;沙质草原沙漠化不同阶段的C/N比呈现增加的趋势.

关键词: 草原, 沙漠化, 土壤碳、氮衰减

Abstract: This paper investigated the aboveground vegetations and the soil texture and total C and N at 75 sites of Duolun County in Xilinguole League of Inner Mongolia.The results showed that different types of vegetation community could be used to describe different stages of desertification process.During desertification,the community types were changed in the series of Leymus chinensis+Cleistogenes squarrosa → Artemisia frigida → Artemisia intramongolia → Corispermum staunyonii,Chenopodium bryoniaefolium → drift sand,and a regular change of soil clay and total C and N contents could also be found.The soil C/N ratio was increased with different stages of grassland desertification,which could be expressed in the series of 8.11→13.96→12.36→28.17.

Key words: Grassland, Desertification, Soil C and N degradation

中图分类号:

刘颖茹, 杨持, 朱志梅, 刘美玲. 我国北方草原沙漠化过程中土壤碳、氮变化规律研究[J]. 应用生态学报, 2004, (9): 1604-1606.

LIU Yingru, YANG Chi, ZHU Zhimei, LIU Meiling . Soil C and N dynamics during desertification of grassland in Northern China[J]. Chinese Journal of Applied Ecology, 2004, (9): 1604-1606.

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