ダウンロード数: 452
このアイテムのファイル:
ファイル | 記述 | サイズ | フォーマット | |
---|---|---|---|---|
j.agsy.2012.09.007.pdf | 333.01 kB | Adobe PDF | 見る/開く |
タイトル: | Economic and environmental impacts of changes in culling parity of cows and diet composition in Japanese beef cow–calf production systems |
著者: | Oishi, Kazato https://orcid.org/0000-0001-9311-7432 (unconfirmed) Kato, Yohei Ogino, Akifumi Hirooka, Hiroyuki https://orcid.org/0000-0002-9169-2908 (unconfirmed) |
著者名の別形: | 大石, 風人 |
キーワード: | Beef cow–calf production Optimal culling parity Annualized net revenue Environmental impact Life cycle assessment Modified feed formulation method |
発行日: | Feb-2013 |
出版者: | Elsevier Ltd. |
誌名: | Agricultural Systems |
巻: | 115 |
開始ページ: | 95 |
終了ページ: | 103 |
抄録: | The effects of changes in culling parity of cows and diet composition on economic and environmental outputs in Japanese beef cow–calf production systems were deterministically analyzed using a herd model simulation. The model simulated the annualized net revenue as an economic indicator and the overall environmental index derived from a life cycle assessment (LCA) as an environmental indicator. Biological factors (survivability, growth, reproduction, and feed requirements) and economic factors (returns from sales of live calves and cows’ carcasses and production costs) were included in the model. The model also included modified feed formulation methods, allowing us to analyze the effect of reductions in environmental loads caused by the change in diet compositions. The results of the present study indicated that later culling was economically and environmentally optimal under the current production system, which suggested that the selection of economically optimal culling parity of cows could result in environmentally optimization of the beef cow–calf production system. The difference in feed composition derived from the difference in feed formulation methods did not affect the determination of optimal culling parity, whereas the use of modified feed formulation methods could reduce environmental loads at a higher rate than that of economic benefits. However, the reduction rate of the environmental impact was much higher in the case of selection of the optimal culling parity than in the case of use of modified feed formulation methods, which stressed the importance of choosing the optimal culling parity of cows both from the economic and environmental points of view. |
著作権等: | © 2012 Elsevier Ltd. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/168980 |
DOI(出版社版): | 10.1016/j.agsy.2012.09.007 |
出現コレクション: | 学術雑誌掲載論文等 |
このリポジトリに保管されているアイテムはすべて著作権により保護されています。