干旱区生态环境知识资源中心(Arid): Patterns of soil nitrogen mineralization under a land-use change from desert to farmland

Arid

DOI	10.1111/ejss.12823
	Patterns of soil nitrogen mineralization under a land-use change from desert to farmland
	Yang, Rong 1,2; Du, Zeyu 1; Kong, Junqia 1; Su, Yongzhong 1; Xiao, Xiangming 2; Liu, Tingna 1; Wang, Min 1; Fan, Guipin 1
通讯作者	Yang, Rong
来源期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
ISSN	1351-0754
EISSN	1365-2389
出版年	2020
卷号	71 期号:1 页码:60-68
英文摘要	Understanding how soil nitrogen (N) mineralization (N-min) responds to environmental changes is critical for improving ecosystem management, especially in a resource-constrained region. Intensive land exploitation in arid land has profound influences on soil ecosystems and thus on soil N-min. A local-scale field investigation was conducted to reveal the temporal dynamics of N-min under land-use change from desert to farmland, and to verify the mechanisms controlling N-min change during this process in a typical desert oasis region. The results showed that N-min ranged from -0.14 to 2.69 mg N kg(-1) day(-1), with an average value of 0.74 mg N kg(-1) day(-1). N-min in old oasis farmland (OOF) was significantly higher than that in GCF (Gobi desert conversion farmland) and SCF (sandy desert conversion farmland), and the average change rates of N-min were 0.036 and 0.032 mg N kg(-1) day(-1) year(-1) in GCF and SCF, respectively. Structural equation modelling (SEM) was used to test whether the measured variables affected N-min, and the results showed that soil organic matter (SOM), bulk density (BD) and sand content were the main soil factors affecting N-min. These soil factors, together with farmland type and cropping time, can explain 31% of the variation in N-min. Our observations revealed that N-min changed substantially under the land conversion process from desert to farmland, and our findings will help with assessments and predictions of future N cycles in desert oasis regions in response to land-use change. Highlights We used N-min as an observed variable to evaluate the dynamics of the soil evolution process under a land-use change from desert to farmland. Cropping year was identified by using map image data to reveal temporal trend of N-min. N-min was primarily affected by soil organic matter, bulk density and sandy content. Intensive land exploitation in arid land profoundly influences soil N-min.
英文关键词	desert oasis land-use change nitrogen mineralization sand content soil organic matter
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000506301800006
WOS关键词	TEMPERATURE SENSITIVITY ; MICROBIAL BIOMASS ; N MINERALIZATION ; CARBON ; REGION ; OASIS ; WATER ; PH ; ACCUMULATION ; MECHANISMS
WOS类目	Soil Science
WOS研究方向	Agriculture
EI主题词	2020-01-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312054
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Linze Inland River Basin Res Stn, 320 West Donggang Rd, Lanzhou 730000, Gansu, Peoples R China; 2.Univ Oklahoma, Ctr Spatial Anal, Dept Microbiol & Plant Biol, Norman, OK 73019 USA
推荐引用方式 GB/T 7714	Yang, Rong,Du, Zeyu,Kong, Junqia,et al. Patterns of soil nitrogen mineralization under a land-use change from desert to farmland[J],2020,71(1):60-68.
APA	Yang, Rong.,Du, Zeyu.,Kong, Junqia.,Su, Yongzhong.,Xiao, Xiangming.,...&Fan, Guipin.(2020).Patterns of soil nitrogen mineralization under a land-use change from desert to farmland.EUROPEAN JOURNAL OF SOIL SCIENCE,71(1),60-68.
MLA	Yang, Rong,et al."Patterns of soil nitrogen mineralization under a land-use change from desert to farmland".EUROPEAN JOURNAL OF SOIL SCIENCE 71.1(2020):60-68.