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Changes of Soil C Stock under Establishment and Abandonment of Arable Lands in Permafrost Area : Central Yakutia

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タイトル: Changes of Soil C Stock under Establishment and Abandonment of Arable Lands in Permafrost Area : Central Yakutia
著者: Desyatkin, Alexey R. 著作を一覧する
Iwasaki, Shinya 著作を一覧する
Desyatkin, Roman V. 著作を一覧する
Hatano, Ryusuke 著作を一覧する
キーワード: Central Yakutia
arable land
soil organic carbon
soil carbonate carbon
soil carbon recovery
発行日: 2018年 8月 8日
出版者: MDPI
誌名: Atmosphere
巻: 9
号: 8
開始ページ: 308
出版社 DOI: 10.3390/atmos9080308
抄録: Central Yakutia is in one of the most northern agricultural centers of the world. In this territory a notable area of arable land was made by removing the boreal Taiga with the primary purpose of crop cultivation. Such a method of cultivation significantly changes soil total carbon (STC, soil organic carbon + soil carbonate carbon) balance, because of the destroyed upper humus horizon. Soil organic carbon (SOC) of cultivated arable lands is almost a half of that in forest. In abandoned arable lands with grass vegetation, the recovery of SOC has increased to 30% in comparison with cultivated arable lands. On arable lands recovering with new growth of trees, the SOC is related to the abandonment period. Soil carbonates carbon (SCC) content was significantly lower than SOC and showed significant difference among abandoned and other types of arable lands. Objectives of this study are to identify how STC stocks change in response to conversion of the forests to agricultural land and to analyze the arable land system's recovery process after abandonment. Furthermore, after transformation of forest to arable land, a significant decrease of STC was observed, primarily due to mechanical loss after plant residue removal. It was also identified that the restoration and self-recovery of STC in abandoned arable lands of Central Yakutia continuously and slightly increase. Grass vegetation regenerates STC for 20 years. While the difference of average STC of forests and cultivated arable lands reached 41%, a new growth of forest on some abandoned arable land follows the tendency of STC decrease due to a low productivity level and suppressing effect on grass vegetation.
Rights: ©2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
資料タイプ: article
URI: http://hdl.handle.net/2115/71655
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 波多野 隆介

 

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