| Summary: | 碩士 === 國立臺灣大學 === 生物環境系統工程學系暨研究所 === 91 === ABSTRACT
In this study, town level of Chang- Hua county and Yun-Lin county are used for unit to describe the temporal and spatial changes and distributions of the livestock industry. The analysis shows that the structure of animal agriculture has changed dramatically over the last two decades. Small and medium-sized livestock operations have been replaced by large operations at a steady rate. These changes in animal agriculture have resulted in increased problems associated with the utilization and disposal of animal waste. As livestock production has become more spatially concentrated, in some towns the production of recoverable manure nutrients exceeds the assimilative capacity of all the farmland available for manure. This situation continues worsening, also causing the critical irrigation and river pollution problems.
Besides, the ratio of manure nutrients production and assimilative capacity was quantified to find out the nutrients loading of each town. A simple inquiring system was established by using GIS. By this system we could understand the trend and the severity of problems, which provided as a valuable tool for decision makers.
Keywords: livestock waste, assimilative capacity, geographic information system.
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