システムダイナミックス手法による稲わら回収モデルの研究
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概要
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A rice straw collection model using the system dynamics method was developed to analyze factors such as 1) number of working days when straw could be collected, 2) number of machinery-operating days, and 3) number of machines required, in warm and cold regions on Japan's Pacific side (WP and CP, respectively) and in cold regions on the Sea of Japan side (CS). We used a model with six straw stocks : field-dried to three dryness levels, and wind rowed, baled, or collected;and four work flows : swath turning, rowing, baling, and transporting. The 10-year analysis (2000-2009) showed that in WP, during a 3.5-month work period, there were 61 workable days ; 39 were spent for packing and transporting field-dried straw to collection sites. Straw was collected in a stable manner but was exposed to rainfall for longer periods because of the extended collection period. In CP, during a 2.5-month work period, there were 38 workable days ; 23 were spent for packing and transporting. Because the collection period was short, in some high-rainfall years the amounts of straw collected were far below aimed. However, because the work was concentrated over a short period, the collected straw was generally exposed to rainfall for less time than in WP. In CS, during a 2.5-month work period, there were 26 workable days ; only 6 were spent packing and transporting. Collecting straw at high water content increased the number of packing and transporting days to 11 but reduced the number of machines required, except for transportation trucks.
- 日本農作業学会の論文
日本農作業学会 | 論文
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