关键词: 集约林业, 区域农业, 土地资源, 种植业, 土地类型, 土地评价, 秦皇岛, 农业生产, 林牧业, 利用类型

Abstract: Land is an integrated concept. It is a certain section of the Earth's surface composed of climate, hydrology, geology, geomorphology, soil, vegetation, and other elements important to Man's achievements. It is the place where Man lives and works. So, land is regarded as a kind of natural resource for its usability and limited amount; and the Man's influence imposed upon the land has been enlarged increasingly. There have always been the needs to understand it better in order to use this resource more effectively and harmlessly.Land classification and evaluation, land-use analysis, and land-use planning are regarded as four branches of the land science. In fact, these are just links of a chain as a whole, interlocked to each other. This article is an attempt to explore the relationships in between.In the integrated study of the land in Qinhuangdao Area, the land is classified into 15 categories and 41 types according to its natural features and their spatial proterties. Then, using the land types as basic units, the land evaluation for the purpose of agricultural land development is carried out. The result of the land evaluation is used as a basis for the agricultural landuse planning; also, a method is proposed using the regional land quality to determine the orientations of the agricultural land development of the area.It is concluded that the regional land structure, or the spatial and quantitative pattern of the land types in an area, determines the regional land suitability structure for a given purpose, the agricultural land development; and the latter determines the spatial and quantitative pattern of the land-use of this purpose, i.e. the regional agricultural land use structure.