干旱区生态环境知识资源中心(Arid): Response of soil C:N:P stoichiometry, organic carbon stock, and release to wetland grasslandification in Mu Us Desert

Arid

DOI	10.1007/s11368-019-02351-1
	Response of soil C:N:P stoichiometry, organic carbon stock, and release to wetland grasslandification in Mu Us Desert
	He, Huan 1; Xia, Guotong 2; Yang, Wenjin 2; Zhu, Yunpeng 1; Wang, Guodong 1; Shen, Weibo 3
通讯作者	Wang, Guodong ; Shen, Weibo
来源期刊	JOURNAL OF SOILS AND SEDIMENTS
ISSN	1439-0108
EISSN	1614-7480
出版年	2019
卷号	19 期号:12 页码:3954-3968
英文摘要	Purpose Wetlands in Mu Us Desert have severely been threatened by grasslandification over the past decades. Therefore, we studied the impacts of grasslandification on soil carbon (C):nitrogen (N):phosphorus (P) stoichiometry, soil organic carbon (SOC) stock, and release in wetland-grassland transitional zone in Mu Us Desert. Materials and methods From wetland to grassland, the transition zone was divided into five different successional stages according to plant communities and soil water conditions. At every stage, soil physical and chemical properties were determined and C:N:P ratios were calculated. SOC stock and soil respirations were also determined to assess soil carbon storage and release. Results and discussion After grasslandification, SOC contents of top soils (0-10 cm) decreased from 100.2 to 31.79 g kg(-1) in June and from 103.7 to 32.5 g kg(-1) in October; total nitrogen (TN) contents of top soils (0-10 cm) decreased from 3.65 to 1.85 g kg(-1) in June and from 6.43 to 3.36 g kg(-1) in October; and total phosphorus (TP) contents of top soils (0-10 cm) decreased from 179.4 to 117.4 mg kg(-1) in June and from 368.6 to 227.8 mg kg(-1) in October. From stages Typha angustifolia wetland (TAW) to Phalaris arundinacea L. (PAL), in the top soil (0-10 cm), C:N ratios decreased from 32.2 to 16.9 in June and from 19.0 to 11.8 in October; C:P ratios decreased from 1519.2 to 580.5 in June and from 19.0 to 11.8 in October; and N:P ratios decreased from 46.9 to 34.8 in June and changed from 34.9 to 34.0 in October. SOC stock decreased and soil respiration increased with grasslandification. The decrease of SOC, TN, and TP contents was attributed to the reduction of aboveground biomass and mineralization of SOM, and the decrease of soil C:N, C:P, and N:P ratios was mainly attributed to the faster decreasing speeds of SOC than TN and TP. The reduction of aboveground biomass and increased SOC release led by enhanced soil respiration were the main reasons of SOC stock decrease. Conclusions Grasslandification led to lowers levels of SOC, TN, TP, and soil C:N, C:P, and N:P ratios. Grasslandification also led to higher SOC loss, and increased soil respiration was the main reason. Since it is difficult to restore grassland to original wetland, efficient practices should be conducted to reduce water drainage from wetland to prevent grasslandification.
英文关键词	Carbon stock and release C:N:P stoichiometry Grasslandification Nutrient status Wetland
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000505160200008
WOS关键词	LAND-USE CHANGE ; P STOICHIOMETRY ; SPATIAL VARIABILITY ; MICROBIAL BIOMASS ; NUTRIENT CONTENTS ; PHOSPHORUS ; NITROGEN ; STORAGE ; PLANT ; RESTORATION
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
EI主题词	2019-12-01
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311167
作者单位	1.Northwest A&F Univ, Coll Sci, Yangling 712100, Shaanxi, Peoples R China; 2.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China; 3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	He, Huan,Xia, Guotong,Yang, Wenjin,et al. Response of soil C:N:P stoichiometry, organic carbon stock, and release to wetland grasslandification in Mu Us Desert[J]. 西北农林科技大学,2019,19(12):3954-3968.
APA	He, Huan,Xia, Guotong,Yang, Wenjin,Zhu, Yunpeng,Wang, Guodong,&Shen, Weibo.(2019).Response of soil C:N:P stoichiometry, organic carbon stock, and release to wetland grasslandification in Mu Us Desert.JOURNAL OF SOILS AND SEDIMENTS,19(12),3954-3968.
MLA	He, Huan,et al."Response of soil C:N:P stoichiometry, organic carbon stock, and release to wetland grasslandification in Mu Us Desert".JOURNAL OF SOILS AND SEDIMENTS 19.12(2019):3954-3968.