国立研究開発法人 国際農林水産業研究センター | JIRCAS

Economic Valuation of the Agricultural Impact on Nitrogen in the Water Environment by a Newly Proposed Replacement Cost Method

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

Agriculture is multifunctional, and the value of each function should be expressed in a form that is easy for anyone to understand. One function, for example, is water purification, and recently much effort has been expended to quantify this function. The author proposed a new replacement cost method for the economic valuation of the nitrogen (N) removal function of paddy fields and of the N effusing function of upland fields, and then economically valuated cultivated lands Japan-wide. The N removal function of cultivated paddy fields and fallow paddy fields was valued at approximately 0.3 JPY m-2 d-1 and 0.6 JPY m-2 d-1, respectively, when replaced by the sum of maintenance and depreciation costs of water quality improvement facilities. Upland fields have a negative economic value of approximately 0.08 JPY m-2 d-1. However, paddy fields function effectively in N removal only when the irrigation water is strongly contaminated with N. Consequently, 85% of the area used for paddy fields does not function in N removal. The use of N-contaminated water from upland fields for paddy field irrigation throughout the year might be environmentally and economically effective with respect to the conservation of water quality in agricultural areas.

刊行年月2008-10-01
作成者SHIRATANI EisakuKIRI HirohideTANJI Hajime
著者キーワード

Japanese yen

paddy field

upland field

wetland

公開者Japan International Research Center for Agricultural Sciences
データ作成日2008-10-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
42
4
開始ページ285
終了ページ289
DOI10.6090/jarq.42.285
権利Japan International Research Center for Agricultural Sciences
言語eng