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  1. 理学部
  2. 学外刊行物(理学部)
  3. 雑誌

Ecosystem carbon dioxide exchange and water use efficiency in a triple-cropping rice paddy in Southern India: A two-year field observation

http://hdl.handle.net/10935/0002005898
http://hdl.handle.net/10935/0002005898
16e4e6b5-aa70-445d-82ea-9f3d6fe02046
名前 / ファイル ライセンス アクション
/ https://doi.org/10.1016/j.scitotenv.2022.158541
アイテムタイプ default_学術雑誌論文 / Journal Article(1)
タイトル
タイトル Ecosystem carbon dioxide exchange and water use efficiency in a triple-cropping rice paddy in Southern India: A two-year field observation
言語 en
言語
言語 eng
キーワード
言語 en
主題Scheme Other
主題 Gross primary production
キーワード
言語 en
主題Scheme Other
主題 Net ecosystem production
キーワード
言語 en
主題Scheme Other
主題 Fallow period
キーワード
言語 en
主題Scheme Other
主題 Evapotranspiration
キーワード
言語 en
主題Scheme Other
主題 Eddy covariance
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 Oo Aung Zaw

× Oo Aung Zaw

en Oo Aung Zaw

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山本 昭範

× 山本 昭範

en Yamamoto Akinori

ja 山本 昭範

ja-Kana やまもと あきのり

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Ono Keisuke

× Ono Keisuke

en Ono Keisuke

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Umamageswari Chellappan

× Umamageswari Chellappan

en Umamageswari Chellappan

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Mano Masayoshi

× Mano Masayoshi

en Mano Masayoshi

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Vanitha Koothan

× Vanitha Koothan

en Vanitha Koothan

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Elayakumar Palanisamy

× Elayakumar Palanisamy

en Elayakumar Palanisamy

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Matsuura Shoji

× Matsuura Shoji

en Matsuura Shoji

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Bama Kaliappan Sathiya

× Bama Kaliappan Sathiya

en Bama Kaliappan Sathiya

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Raju Marimuthu

× Raju Marimuthu

en Raju Marimuthu

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犬伏 和之

× 犬伏 和之

en Inubushi Kazuyuki

ja 犬伏 和之

ja-Kana いぬぶし かずゆき

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須藤 重人

× 須藤 重人

en Sudo Shigeto

ja 須藤 重人

ja-Kana すどう しげと

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齋藤 尚子

× 齋藤 尚子

en Saitoh Naoko

ja 齋藤 尚子

ja-Kana さいとう なおこ

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林田 佐智子

× 林田 佐智子

KAKEN2 1000070180982

en Hayashida Sachiko

ja 林田 佐智子

ja-Kana はやしだ さちこ

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Ravi Venkatachalam

× Ravi Venkatachalam

en Ravi Venkatachalam

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Ambethgar Vellaisamy

× Ambethgar Vellaisamy

en Ambethgar Vellaisamy

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抄録
内容記述タイプ Abstract
内容記述 The lowland tropical triple-cropping rice system has unique characteristics that affect the hydrological, nutrient, and atmospheric environments. To better understand the ecosystem carbon and water dynamics of a triple-cropping rice paddy from the perspective of sustainability, ecosystem-level CO2 flux and ecosystem water use efficiency (eWUE) were observed using eddy covariance over 2 years (2016–2018) at an experimental field site in southern India, and gross primary production (GPP) and ecosystem respiration (RE) were derived using the flux partitioning technique. Results showed that among the three crop seasons per year, GPP and RE were higher (887.2 and 570.2 g C m−2, respectively) in Thaladi (October–January: wet season) than in Kuruvai (June–September: dry season; 773.4 and 568.9 g C m−2, respectively) and summer rice (February–May; 694.0 and 499.7 g C m−2, respectively) owing to the longer growing season. Triple-cropping meant that the quasi-annual GPP of 2598 g C m−2 (i.e., the total value for the three consecutive seasons, including the corresponding fallow periods) was much greater than the quasi-annual RE of 1974 g C m−2. Consequently, the net ecosystem production value was positive (624 g C m−2). Evapotranspiration was also high on the annual scale (1681 mm); that is, 48 % greater than mean annual precipitation (1139 mm). Analysis revealed that Thaladi had higher eWUE (2.21 g C (kg H2O)−1) than that of Kuruvai (1.46 g C (kg H2O)−1) and summer rice (1.57 g C (kg H2O)−1) owing to decreased water loss in cloudy weather. Intense solar radiation is generally recognized as advantageous for crop growth in most regions, but not for Kuruvai and summer rice, when too strong solar radiation increases loss of water unused for photosynthesis. The findings indicate that water-saving techniques should be targeted on the Kuruvai and summer rice seasons.
言語 en
書誌情報 en : Science of The Total Environment

巻 854, p. 158541, 発行日 2023-01-01
出版者
出版者 Elsevier BV
言語 en
ISSN
収録物識別子タイプ EISSN
収録物識別子 1879-1026
DOI
識別子タイプ DOI
関連識別子 10.1016/j.scitotenv.2022.158541
権利
権利情報 © The Authors
言語 en
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