A Study On Optimized Model Of Animal Husbandry Production System In Typical Area Of Agri-pastoral Transitional Zone

Agri-pastoral transitional zone is a typical ecotone, which spreads widely in northern China and has a series of features caused by interaction between neighboring agricultural system and pastoral system. Since the production has both agricultural and pastoral characteristics in this area, the study of optimized model of animal husbandry production system in this area has important theoretical and practical significance for the development of animal husbandry in China. This case study is conducted in Chifeng prefecture, Inner Mongolia, which locates in typical agri-pastoral transitional zone of northern China. The main results of the research are as follows:Four principals of delimitation of agri-pastoral transitional zone are put forward, which are principal of integrated action and dominant limited factors, principal of coherence of natural resources, principal of coordination among human being, environment and biology and periodical principal . With the guidance of above-mentioned principals, twenty-five indexes that represent natural factors, human factors and economic factors are selected to establish the delimitation index system of agri-pastoral transitional zone. Using cluster analysis method, quantitative delimitation of agri-pastoral transitional zone in Chifeng Prefecture is conducted tentatively. Chifeng prefecture is divided into three sub-areas, which are agricultural sub-area, agri-pastoral transitional sub-area and pastoral sub-area. Analysis and comparison are conducted among these sub-areas.Considering two circumstances of actual utilization rate and reasonable utilization rate of herbage and using daily feed consumption and digestible energy (DE), carrying capacity of domestic animals is calculated and compared separately in different sub-areas. Supply and requirements of digestible energy (DE) and digestible crude protein (DCP) in each sub-area are analyzed. The results indicate that three sub-areas are all overgrazed whether in summer and autumn or in winter and spring under the reasonable utilization rate of herbage. At the same time,...