Agriculture-Stock Production in Agro-Pastoral Interlaced Region in Northern China: Ⅰ. Models
中国北方农牧交错地区农牧业生产模型及应用:Ⅰ.模型

The production system of agriculture-stock in agro-pastoral interlaced region in Northern China is a complex system which is affected not merely by social and economic factors but also by natural factors. A group of hierarchical models is needed to describe the complex system. The paper proposed a set of models including 25 basic variables representing social and economical and natural settings. Sub-models are effective labor model, fixed capital model, productive cost model and land productivity model. The effects of land use type and desertification on the land productivity are considered. The group of hierarchical models can be applied for analyzing the feature of the production system of agriculture-stock.