山地农业资源的时空性与持续利用研究：以陕西秦巴山地为例

山地是一种特殊的生态环境类型，受自然分异规律与人类经济活动的双重干预和影响，产生其特有的时空分异规律与层带组合格局。通过土地生态类型格局分析，可以揭示山地生态环境类型结构瑟功能的异质性和有序性，从而为探讨农业资源的时空性及其开发利用模式提供科学指导。

STUDIES ON THE SPACE TIME ORDERLINESS AND SUSTAINABLE USE OF AGRICULTURAL RESOURCES IN MOUNTAINOUS AREA

Mountainous land is a special type of eco environment. One of its important characteristics is space time orderliness. Land ecotype on the one hand brings vertical distribution with the altitude change on the spatial scale and on the other hand interreciprocal succession takies place on the time order for the continuous change of natural environment and prominent effect of human activity. Therefore, the space time orderliness becomes an important theoretical basis in analyzing the evolution,pattern and agricultural resource in mountainous eco environment. In this paper taking Qin Ba Mountain of Shaanxi Province as an example, the author points out that it is reliable and reasonable to reveal the environmental structure, function and distribution laws of agricultural resources by using RS and GIS to evaluate qualitatively land ecotype and divide different ecotype zone. The agricultural resources involve agricultural environmental resources, economical product and social labor resources. The environmental resources, which can be regarded as basis of generating the economical resources, are related compactly with regional eco environment and abide by the zonal principle of mountain land. The economical resources, which are the physical form of the environmental resources, are related directly with appointed agricultural action and abide by eco economy theory. The social labor resources, whose effect shows dualism, are regarded as the main body and ligament that integrate the above two kinds of resources. The essence of sustainable use of agricultural resources is to combine the sustainability of environmental resources system with sustainable increase of agricultural products to meet the demand of getting rid of poverty and realizing sustainable development of society and economy by giving play to the positive actions of labors in mountainous area.