岡山県における水田からのメタン発生に及ぼす土壌型並びに水管理の影響

概要

論文の詳細を見る
Field studies were carried out throughout the rice cultivation period at three different paddy fields (poorly drained paddy field, medium-drained paddy field and well-drained paddy field) located in Okayama Prefecture in 1992 and 1993. 1) The amount of methane emission greatly varied between the two years, and a stable tendency in the pattern of methane emission was not observed. 2) The amount of methane emission from the poorly drained paddy field was largest among the fields, and methane emission from the medium-drained paddy field and well-drained paddy field greatly varied as the years passed. 3) The oxidation reduction potential was influenced both by the period of surface drainage, such as mid-summer drainage, and the weather conditions during surface drainage. 4) One problem in surface drainage is that the soil is hard to oxidize during rainfall or in poorly drained paddy fields. Thus, effective drainage, such as prolonging the drainage period during rainfall, is necessary in order to suppress methane emission by water management.
社団法人日本土壌肥料学会の論文
1997-08-05