4. Conclusion
If the spatial distribution is not rational, then livestock and poultry farming can lead to a series of environmental problems.However, most recent plans lack scientific proof and formulate decisions on quantity and spatial distribution based only on natural factors. Consequently, most cities cannot balance environmental protection and livestock farming development. This study establishes a land suitability evaluation index system for the spatial distribution of livestock and poultry farming. The system,which is based on natural, human, economic, and environmental factors, is applied to an empirical study of land suitability for livestock and poultry farming in Putian, Fujian. The established system optimizes the suitable quantity distribution in each county and district. The results are as follows.
To weigh the various factors that affect the spatial distribution of livestock and poultry farming, a rational scientific evaluation index system for the spatial distribution of livestock and poultry farming should be based on multiple indices.
The combined Delphi method and AHP, which balances the effects of various factors on the spatial distribution of livestock and poultry farming, conforms to the concept that pollution control should focus on the source rather than on the end treatment.
GIS technology and the adaptive hierarchical evaluation index system allow land suitability evaluation of livestock and poultry farming to change from qualitative or quantitative assessment to integrated assessment, thereby expanding the range of ideas and methods in this field.
Based on the quantitative method of studying the level of land suitability, this study determines the spatial and quantity distribution for livestock farming, which can lead to a more scientific and rational planning in this field. This study also presents a feasible solution and a practical example of livestock farming planning that can provide an effectively technical guidance in land use and livestock pollution management. The results of this study can be used as a viable strategy for maximizing the benefits of intensive land use while preventing environmental damage.