干旱区生态环境知识资源中心(Arid): Changes in soil organic carbon and nitrogen after 26 years of farmland management on the Loess Plateau of China

Arid

	Changes in soil organic carbon and nitrogen after 26 years of farmland management on the Loess Plateau of China
	Zhou Zhengchao; Zhang Xiaoyan; Gan Zhuoting
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2015
卷号	7 期号:6 页码:806-813
英文摘要	Soil carbon (C) and nitrogen (N) play a crucial role in determining the soil and environmental quality. In this study, we investigated the effects of 26 years (from 1984 to 2010) of farmland management on soil organic carbon (SOC) and soil N in abandoned, wheat (Triticum aestivum L.) non-fertilized, wheat fertilized (mineral fertilizer and organic manure) and alfalfa (Medicago Sativa L.) non-fertilized treatments in a semi-arid region of the Loess Plateau, China. Our results showed that SOC and soil total N contents in the 0-20 cm soil layer increased by 4.29 (24.4%) and 1.39 Mg/hm~2 (100%), respectively, after the conversion of farmland to alfalfa land. Compared to the wheat non-fertilized treatment, SOC and soil total N contents in the 0-20 cm soil layer increased by 4.64 (26.4%) and 1.18 Mg/hm~2 (85.5%), respectively, in the wheat fertilized treatment. In addition, we found that the extents of changes in SOC, soil total N and mineral N depended on soil depth were greater in the upper soil layer (0-30 cm) than in the deeper soil layer (30-100 cm) in the alfalfa land or fertilizer-applied wheat land. Fertilizer applied to winter wheat could increase the accumulation rates of SOC and soil total N. SOC concentration had a significant positive correlation with soil total N concentration. Therefore, this study suggested that farmland management, e.g. the conversion of farmland to alfalfa forage land and fertilizer application, could promote the sequestrations of C and N in soils in semi-arid regions.
英文关键词	soil organic carbon (SOC) soil N fertilizer land use change semi-arid area
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	History
CSCD记录号	CSCD:5524749
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335549
作者单位	Zhou Zhengchao, Department of Tourism and Environmental Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710062, China.; Zhang Xiaoyan, Department of Tourism and Environmental Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710062, China.; Gan Zhuoting, Baoji University of Arts and Sciences, Key Laboratory of Disaster Survey and Mechanism Simulation of Shaanxi Province, Baoji, Shaanxi 721007, China.
推荐引用方式 GB/T 7714	Zhou Zhengchao,Zhang Xiaoyan,Gan Zhuoting. Changes in soil organic carbon and nitrogen after 26 years of farmland management on the Loess Plateau of China[J],2015,7(6):806-813.
APA	Zhou Zhengchao,Zhang Xiaoyan,&Gan Zhuoting.(2015).Changes in soil organic carbon and nitrogen after 26 years of farmland management on the Loess Plateau of China.Journal of Arid Land,7(6),806-813.
MLA	Zhou Zhengchao,et al."Changes in soil organic carbon and nitrogen after 26 years of farmland management on the Loess Plateau of China".Journal of Arid Land 7.6(2015):806-813.