摘要
以陕北风沙滩地区为例，提出了基于景观类型格局开展退化土地利用优化配置的新思路。景观类型格局及其变化取决于各种景观要素综合作用下所产生的时空异质性，一般表现为广域型格局和镶嵌型格局两种基本形式。镶嵌型景观类型具有明显的边缘效应和内部均质性，以此为客体进行土地利用配置，就是要遵循景观生态学原理和可持续发展准则，寻求退化土地资源合理配置与持续利用的模式和途径。
In this paper, a new thinking on the optimal allocation of degraded land use is put forward based on landscape type patterns in the aeolian－sand area of Northern Shaanxi Province as an example. The obectives are to realize the reasonable allocation and arrangement of the limited land resources among the departments and districts, to promote coordinated man－land relation system according to the order and sustainable development, thus the wnstruction of land eco－economy system must.abide by the landscape ecology theory and sustainable development norms.Landscape factors have been divided into two types in light of their state and action mechanism, namely background factors (soil, vegetation and the substance of the earth's surface) and driving factors (climate change and human activities). The property and spatia1 distribution of background factors can indicate and decide the forms and evolution of landscape eco－types, so starting from analyzing the action mechanism of landscape factors, the heterogeneity of landscape eco－type may be revealed, this provide an effective way for classifying of landscape. Based on this principle, the index method of landscape factors for dividing landscape type is adopted in this paper.Landscape type patterns are the spatial combination and distribution relation of landscape type, namely widespread pattern and inlaid pattern. As a result, the second type is a inlaid plot composed of landscape background factors, which have distinct edge－effect and internal homogeneity, and provide imPOrtant basis for optimal allocation of regional land use. Specially, its succession model and function model provide theory foundation for designing models of land use. Finally, in the light of these, three models of the optimal allocation of degraded land use are put forward, namely harmonious Iand use model among agriculture, forestry and stock raising, the eco－economic model of vegetation protection and the model of sustainable cultivated land use.
出处
《干旱区地理》
CSCD
北大核心
1998年第4期28-33,共6页
Arid Land Geography
基金
中国博士后科学基金
关键词
景观类型格局
退化土地
土地利用配置
沙滩地区
landscape type pattern
degraded land
land use allocation
blown－sand area of northern shaanxi province
