首页|期刊导航|中国农业科学（英文版）|The Heterogeneity and Its Influencing Factors of Soil Nutrients in Peak-Cluster Depression Areas of Karst Region
中国农业科学（英文版）2007，Vol.6Issue(3)：322-329,8.
The Heterogeneity and Its Influencing Factors of Soil Nutrients in Peak-Cluster Depression Areas of Karst Region
The Heterogeneity and Its Influencing Factors of Soil Nutrients in Peak-Cluster Depression Areas of Karst Region
摘要
Abstract
By selecting a typical peak-cluster depression area of karst region in Southwest China, we evaluated the effect of land use types and topographic factors on soil nutrients. Grid and line sampling methods were used to sample soil in depression and slope lands respectively, and classical statistical tools were applied to analyze the spatial variability character of soil organic carbon (SOC), total nitrogen (TN), total phosphorus (TP), total potassium (TK), available nitrogen (AN), available phosphorus (AP), available potassium (AK), pH, and C/N. It was found that land use type was the dominant factor that effected the spatial heterogeneity of SOC, TN, TP, TK, AN, and AP. The content of SOC, TN, and AN decreased with the increase of land use intensity. Due to high fertilizer input, TP and AP in tillage fields were higher than those in the other land use types. TK had no obvious change trend among various land use types. Topographic factors had a significant effect on SOC, TN, TP, AN, AP, AK, and pH. Habitat factor was the dominant factor that effected AK. Altitude factor was the dominant factor for pH. However, all of these factors had no significant effect on C/N. Tillage practice had important effect on soil nutrients loss and soil degradation in the fragile karst ecosystem, and the input of organic manure should be increased in this region.关键词
karst/peak-cluster depression/soil nutrient/land use type/topography factors/soil organic carbonKey words
karst/peak-cluster depression/soil nutrient/land use type/topography factors/soil organic carbon分类
农业科技引用本文复制引用
ZHANG Wei,CHEN Hong-song,WANG Ke-lin,SU Yi-rong,ZHANG Ji-guang,YI Ai-jun..The Heterogeneity and Its Influencing Factors of Soil Nutrients in Peak-Cluster Depression Areas of Karst Region[J].中国农业科学（英文版）,2007,6(3):322-329,8.基金项目
The study was funded by National Natural Science Foundation of China (40501034) （40501034）
and the Knowledge Innovation Program of the Chinese Academy of Sciences (01200220055413), China. （01200220055413）
