干旱区生态环境知识资源中心(Arid): Nitrogen pools in soil covered by biological soil crusts of different successional stages in a temperate desert in Central Asia

Arid

DOI	10.1016/j.geoderma.2019.114166
	Nitrogen pools in soil covered by biological soil crusts of different successional stages in a temperate desert in Central Asia
	Zhou, Xiaobing 1; Tao, Ye 1; Yin, Benfeng 1; Tucker, Colin 2; Zhang, Yuanming1
通讯作者	Zhang, Yuanming
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2020
卷号	366
英文摘要	Biological soil crusts (BSCs) are a primary source of nitrogen (N) in deserts through N-fixation. N-fixation rates may be determined by the species present within BSCs, and environmental factors like temperature and moisture, which vary seasonally. These same factors may also govern dynamics of within-soil N transformations. Few studies have explored the dynamics of different N forms in response to seasonal microclimate variations in BSCs, especially across both the growing season and the snow-covered season (winter). In this study, monthly changes in multiple soil N pools across a full year and beneath three soil cover types - bare soil, cyanobacteria BSC, and lichen BSC - were assessed across a full year in the Gurbantunggut Desert, Central Asia. We focused on multiple organic and inorganic N pools including: total N, alkali-hydrolyzable N, DON, inorganic N (NH4+-N, NO3--N), free amino acids, and microbial biomass N. We found that different N forms had divergent trends during the year, peaked in different months, and showed non-synchronous responses related to seasonal temperature and moisture patterns. Most N forms were most abundant in lichen BSC > cyanobacteria BSC > bare soil, although significant differences were only observed in a few months. In the growing season, available N forms such as soil DON and inorganic N were related to both water and temperature. In winter, available N was strongly related to temperature variability prior to the sampling dates. The high NH4+-N/NO3--N in the early growing season suggest that N fixation or N mineralization were highest at this time. Our results indicate nonsynchronous availability of different N forms, and elevated N availability beneath lichen BSCs, which may maintain the diverse N uptake requirements for different plant species.
英文关键词	Biological soil crusts Nitrogen forms Inorganic nitrogen Dissolved organic nitrogen Microclimate variations Gurbantunggut desert
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000524458000011
WOS关键词	DISSOLVED ORGANIC NITROGEN ; MICROBIOTIC CRUSTS ; COLORADO PLATEAU ; N MINERALIZATION ; RESPONSES ; DYNAMICS ; CARBON ; PATTERNS ; FIXATION ; CYCLES
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	中国科学院新疆生态与地理研究所 ; E18
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314594
作者单位	1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi 830011, Peoples R China; 2.US Natl Forest Serv, Northern Res Stn, 410 MacInnes Dr, Houghton, MI 49931 USA
推荐引用方式 GB/T 7714	Zhou, Xiaobing,Tao, Ye,Yin, Benfeng,et al. Nitrogen pools in soil covered by biological soil crusts of different successional stages in a temperate desert in Central Asia[J]. 中国科学院新疆生态与地理研究所, E18,2020,366.
APA	Zhou, Xiaobing,Tao, Ye,Yin, Benfeng,Tucker, Colin,&Zhang, Yuanming.(2020).Nitrogen pools in soil covered by biological soil crusts of different successional stages in a temperate desert in Central Asia.GEODERMA,366.
MLA	Zhou, Xiaobing,et al."Nitrogen pools in soil covered by biological soil crusts of different successional stages in a temperate desert in Central Asia".GEODERMA 366(2020).