ZHANG Cheng,CAO Jian-hua.Eco-adaptability Assessment of Tilled Land Consolidation in Karst Rock Area in Guangxi Autonomous Region[J].Research of Soil and Water Conservation,2004,11(03):120-121,134.
广西岩溶石山地区耕地整理的生态适宜性综合评价——以县级区域为例
- Title:
- Eco-adaptability Assessment of Tilled Land Consolidation in Karst Rock Area in Guangxi Autonomous Region
- 分类号:
- X171.1;S157
- 摘要:
- 广西分布有51个岩溶县（市）（岩溶面积>30%），由于岩溶的脆弱性特点，开展土地开发整理过程中更加要保护和维护生态环境，即耕地整理需要对地域单元的生态适宜性进行系统分析。考虑到岩溶区的特点及评价指标定量化获取的程度，选择平均海拔、年均降雨、NPP等11个指标参与综合评价。利用统计分析技术中的主成分分析法，对指标进行降维处理，得到3个彼此独立的综合指标。根据综合指标得分，对广西51个岩溶县（市）耕地整理的生态适宜性潜力的相对状况进行了排序。
- Abstract:
- There are 51 karst counties(cities)(karst area30%)in Guangxi Autonomous Region.It is more important to protect eco-environment during the land use and consolidation than that of non-carbonate rock region because of karst fragility,i.e.it is necessary to assess the eco-adaptability of terrain unit before tilled land consolidation.The author select 11 indexes for eco-adaptability assessment of karst prefectural regions in Guangxi,including average altitude,mean annual precipitation,mean annual temperature,NPP,soil respiration,etc.Furthermore,the dimension reduction model is developed based on principal component analysis technique,and three components that are regarded as independent comprehensive indexes are derived. According to the scoring of comprehensive indexes,the eco-adaptability conditions of 51 karst prefectural regions are sorted.The ranking of these regions shows that eco-adaptability is highly related with karst feature complex.
参考文献/References:
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备注/Memo
收稿日期:2003-12-25;
基金项目:国家自然科学基金（批准号：90202016及40152002）；广西基金（批准号：20010229）资助项目
作者简介:章程（1965- ），男，副研究员，从事岩溶环境学研究.