摘要
土地利用变化是全球环境变化的重要组成部分,其可以直接影响到土壤性质的变化。本研究通过中亚热带山区天然林、人工林(用材林和经济林)、次生林、农业用地(橘园和坡耕地)等7种典型土地利用方式土壤性质的研究,结果表明:土地利用变化后土壤有机质和全氮含量下降幅度分别达到52.2%～81.8%和57.9%～172.6%;同时土壤容重增加,pH值升高。而土地利用变化对土壤全磷、全钾的影响的规律较为不明显。综合比较中国区域土地利用变化对土壤性质变化的影响,其中20～25°N纬度带土壤物理化学性质变化幅度最大。
Land use/cover change （LUCC）is one of the most important components of global environment change and it can affect soil properties directly. The influence of LUCC from natural forest, artificial forest （ timber forest and economic forest）, secondary forest, agricultural land （orchard and arable land）on bulk density （BD）, soil organic matter （ SOM ）, soil total nitrogen （ TN ）, total phosphorus （ TP）, total potassium （TK） and pH values was investigated in mid - subtropical mountainous area of southern China. The results showed that. Under the influence of LUCC, the contents of SOM and TN decreased by 52.2% - 81.5% and 57.9% - 172.6%, respectively; while the values of BD and pH increased greatly. The law of the influence of LUCC on the variation of TP and TK isn＇ t obvious. The most significant change of soil properties caused by LUCC in China happened at the latitude of 20 - 25 ° N.
出处
《地理科学》
CSCD
北大核心
2010年第3期475-480,共6页
Scientia Geographica Sinica
基金
国家自然科学基金(40901126)项目资助
