生态环境学报2009，Vol.18Issue(5)：1965-1970,6.
农牧交错带开垦年限对土壤理化特性的影响
Effects of a conversion from grassland to cropland on soil physical-chemical properties in the agro-pastoral ecotone of Inner Mongolia: analysis of a 50-year chronosequence
摘要
Abstract
The study investigated the long time effect of a conversation from grasslands to croplands on soil physical-chemical properties in the farming-pastoral ecotone of Inner Mongolia using direct field samplings. We determined a land use history for the 1955 -2002 from field survery. This land use history was used to build a chronosequence of cropland sites with a different age since the conversation from grassland. Results showed that 50 years of reclamation induced a reduction of soil organic carbon (SOC) content, total nitrogen (TN) content, soil available kalium content, pH levels, clay content and soil bulk density. It was founded that there was clear dependency of soil properties (dissolved organic carbon content; soil available kalium content; pH levels; clay content and soil bulk density) on cropland age. It was expected that this research would provide information for suitably using land and avoiding environmental degradation.关键词
农牧交错带/开垦年限/土壤养分/土壤质地Key words
cropland age/ soil nutrient/ soil texture分类
资源环境引用本文复制引用
焦燕,赵江红,徐柱..农牧交错带开垦年限对土壤理化特性的影响[J].生态环境学报,2009,18(5):1965-1970,6.基金项目
国家重点基础研究发展计划973项目(2007CB106806) （2007CB106806）
中央级公益性科研院所基本科研业务费专项基金项目 （）
国家重点实验室开放课题(LAPC-KF-2008-3) （LAPC-KF-2008-3）
