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  1. F300 宇宙地球環境研究所
  2. F300b 紀要
  3. 名古屋大学加速器質量分析計業績報告書
  4. 25

長期水田利用下で蓄積した土壌有機炭素の安定性

https://doi.org/10.18999/sumrua.25.62
https://doi.org/10.18999/sumrua.25.62
71d126f0-f637-4f5d-8cb1-b7bc2aaf5171
名前 / ファイル ライセンス アクション
nakamura2013.pdf nakamura2013.pdf (4.0 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2015-05-11
タイトル
タイトル 長期水田利用下で蓄積した土壌有機炭素の安定性
言語 ja
その他のタイトル
その他のタイトル Stability of soil organic carbon accumulated under long term use as rice paddy
言語 en
著者 中原, 誌公

× 中原, 誌公

WEKO 83872

ja 中原, 誌公

Search repository
Zou, P.

× Zou, P.

WEKO 83873

en Zou, P.

Search repository
安藤, 豊

× 安藤, 豊

WEKO 83874

ja 安藤, 豊

Search repository
Fu, J.

× Fu, J.

WEKO 83875

en Fu, J.

Search repository
Cao, Z.

× Cao, Z.

WEKO 83876

en Cao, Z.

Search repository
渡邉, 彰

× 渡邉, 彰

WEKO 83877

ja 渡邉, 彰

Search repository
Nakahara, Shiko

× Nakahara, Shiko

WEKO 83878

en Nakahara, Shiko

Search repository
Zou, Ping

× Zou, Ping

WEKO 83879

en Zou, Ping

Search repository
Ando, Ho

× Ando, Ho

WEKO 83880

en Ando, Ho

Search repository
Fu, Jianrong

× Fu, Jianrong

WEKO 83881

en Fu, Jianrong

Search repository
Cao, Zhihong

× Cao, Zhihong

WEKO 83882

en Cao, Zhihong

Search repository
Watanbe, Akira

× Watanbe, Akira

WEKO 83883

en Watanbe, Akira

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
キーワード
主題Scheme Other
主題 14C age
キーワード
主題Scheme Other
主題 Humin
キーワード
主題Scheme Other
主題 Irrigated rice paddy
キーワード
主題Scheme Other
主題 Soil organic matter
抄録
内容記述 The effect of long term use as a rice paddy field on the stability of soil organic C (SOC) was investigated using the plow layer soils collected from two series of rice fields distributed in Hangzhou Bay region, Zhejiang Province, China, which have the estimated periods of time under irrigated rice paddy ranging from 5 to 2000 years. Amount, C and N stable isotopic ratios (δ13C and δ15N), and 14C age were compared mainly for the silt/clay sized fractions of soils and their humin as representative soil organic matter (SOM) fractions with a relatively long residence times due possibly to the adsorption to clay minerals and insolubility in water. The degree of humification of humic acids in silt/clay was also determined. Total C and humin C in the silt/clay fraction increased with increasing estimated period under rice paddy up to 2000 years. The degree of humification of humic acids increased during the first 100 years, but did not change afterward, suggesting that the structural change to refractory substances was not responsible for the enhanced SOC accumulation. A gradual decrease in δ15N suggested the increase in the contribution of organic N fixed recently or derived from fertilizer to total silt/clay N and humin. The 14C age of humin became younger with increasing estimated period under rice paddy, which suggested that the larger SOC in the soils used as rice paddy field for a longer time was owing to the enhanced accumulation of organic C recently assimilated.
言語 en
内容記述タイプ Abstract
抄録
内容記述 中国浙江省の杭州湾湾岸域に分布する推定水田利用年数5~2000年の土壌を用いて、長期的な水田利用が土壌有機炭素の安定性に与える影響を調べた。相対的に粘土鉱物への吸着と不溶性であることから相対的に滞留時聞が長いと考えられるシルト/粘土画分およびそのヒューミン画分に着目して蓄積量、炭素および窒素自然安定同位体比(δ13C、δ15N)および14C年代を比較した。また、フミン酸の黒色度と推定水田利用年数との関係も調べた。シルト/粘土に蓄積している全C量およびヒューミンC量は推定水田利用年数が長い土壌ほど高い傾向を示した。フミン酸の黒色度は推定水田利用年数100年まで増大したが、それ以降は変化が無く、腐植化の進行による難分解構造への変化が有機C蓄積量の増大の原因ではないことを示唆した。一方、δ15Nは水田利用年数1000年から2000年にかけて低下し、肥料由来Nや固定されてからの年数が短い有機Nの蓄積が進んでいる可能性を示唆した。同様にヒューミンの14C年代は推定水田利用年数が長い土壌ほど若く、新しい有機物の蓄積量の増大が全C量の増大に寄与していることが示された。
言語 ja
内容記述タイプ Abstract
内容記述
内容記述 名古屋大学年代測定総合研究センターシンポジウム報告
言語 ja
内容記述タイプ Other
出版者
言語 ja
出版者 名古屋大学年代測定資料研究センター
言語
言語 jpn
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
ID登録
ID登録 10.18999/sumrua.25.62
ID登録タイプ JaLC
書誌情報 ja : 名古屋大学加速器質量分析計業績報告書

巻 25, p. 62-68, 発行日 2014-03
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