CONVERSION FROM GRASSLAND TO CROPLAND AND LENGTH OF CROPPING HISTORY DRIVING SOIL METHANE UPTAKE IN CHINA

doi:10.15666/aeer/1702_51595172

	CONVERSION FROM GRASSLAND TO CROPLAND AND LENGTH OF CROPPING HISTORY DRIVING SOIL METHANE UPTAKE IN CHINA
	Yang, W.1,3; Kang, Y.1,2; Hou, J.3; Zhao, J.3
刊名	APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH
	2019
卷号	17 期号:2 页码:5159-5172
关键词	land-use change greenhouse gases soil physical and chemical properties carbon sink
ISSN号	1589-1623
DOI	10.15666/aeer/1702_51595172
通讯作者	Yang, W.(yangwzh@imnu.edu.cn)
英文摘要	The change of land use from grassland to cropland in Northern China has raised serious concern about regional carbon (C) cycle and greenhouse gas balance. We measured soil methane (CH4) uptake using manual static chambers in grassland and cropland soils in the agro-pastoral ecotone of Inner Mongolia over three growing seasons (2010-2012). The primary aims were to assess the effect of undisturbed grassland and croplands from converted grassland with different land use histories on gas fluxes and systematically compare the site-specific CH4 uptake factor. We found a significant difference (P < 0.001) in CH4 uptake between grassland and croplands from reclaimed grassland for 5, 10 and 50 years old, and cropland soils in 5 and 10 years old were a significant sink of CH4. Compared with cropland soils, the grassland had the lowest cumulative CH4 uptake, with 141.4, 210.0 and 236.0 mg/m(2) during growing seasons of 2010, 2011 and 2012, respectively. Over the 3 growing seasons, the cumulative CH4 uptake of croplands aged 5, 10 and 50 was 544.5, 361.7 and 266.1 mg/m(2). With the increase of farming time, the methane accumulation and absorption of C5, C10 and C50 decreased. Differences in CH4 uptake of grassland and cropland with different length of cropping history can be explained by the amount of soil ammonium nitrogen (NH4+-N) and soil moisture. We conclude that (i) croplands for 5 and 10 years old from reclaimed grassland are the best approach considered here for optimizing the land use as a sink for atmospheric CH4, and (ii) the practice that croplands from grassland reclaimed for more than 10 years old should be planted into grasslands is recommended for managing CH4 uptake and soil carbon sink in the agro-pastoral ecotone of Inner Mongolia, China.
资助项目	National Natural Science Foundation of China[41565009] ; National Natural Science Foundation of China[41675140] ; National Natural Science Foundation of China[41865010] ; National Key Research and Development Program of China[2016YFC0400105] ; Inner Mongolia Youth Innovative Talent Training Program of Prairie Excellence Project 2016
WOS关键词	LAND-USE CHANGE ; INNER-MONGOLIA ; TEMPERATE FOREST ; CH4 UPTAKE ; NITROGEN-FERTILIZATION ; ATMOSPHERIC METHANE ; ORGANIC-CARBON ; N2O EMISSIONS ; GAS FLUXES ; OXIDATION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	CORVINUS UNIV BUDAPEST
WOS记录号	WOS:000462830400239
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Inner Mongolia Youth Innovative Talent Training Program of Prairie Excellence Project 2016
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/48078]
专题	中国科学院地理科学与资源研究所
通讯作者	Yang, W.
作者单位	1.Inner Mongolia Univ, Coll Life Sci, Inner Mongolia Potato Engn & Technol Res Ctr, Hohhot 010021, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Inner Mongolia Key Lab Environm Chem, Hohhot 010022, Peoples R China
推荐引用方式 GB/T 7714	Yang, W.,Kang, Y.,Hou, J.,et al. CONVERSION FROM GRASSLAND TO CROPLAND AND LENGTH OF CROPPING HISTORY DRIVING SOIL METHANE UPTAKE IN CHINA[J]. APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH,2019,17(2):5159-5172.
APA	Yang, W.,Kang, Y.,Hou, J.,&Zhao, J..(2019).CONVERSION FROM GRASSLAND TO CROPLAND AND LENGTH OF CROPPING HISTORY DRIVING SOIL METHANE UPTAKE IN CHINA.APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH,17(2),5159-5172.
MLA	Yang, W.,et al."CONVERSION FROM GRASSLAND TO CROPLAND AND LENGTH OF CROPPING HISTORY DRIVING SOIL METHANE UPTAKE IN CHINA".APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH 17.2(2019):5159-5172.