Nitrogen addition promotes soil phosphorus availability in the subalpine forest of eastern Tibetan Plateau

doi:10.1007/s11368-021-03064-0

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Nitrogen addition promotes soil phosphorus availability in the subalpine forest of eastern Tibetan Plateau
	Liu, Ye 1,2; Bing, Haijian 2; Wu, Yanhong 2; Zhu, He 2; Tian, Xin 1,2; Wang, Zhiguo 1,2; Chang, Ruiying 2
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2021-09-07
页码	11
关键词	Bioavailable phosphorus Fraction variation Nitrogen deposition Subalpine forest Gongga Mountain
ISSN号	1439-0108
DOI	10.1007/s11368-021-03064-0
英文摘要	Purpose The biogeochemical cycling of phosphorus (P) is essential for maintaining plant productivity and thus plays a vital role in soil carbon sequestration. However, how soil P availability responds to increasing atmospheric nitrogen (N) deposition in subalpine forests remains unclear. The aims of this study are to explore the responses of P bioavailability in the subalpine soils of eastern Tibetan Plateau to different N addition levels. Materials and methods A field experiment with three N addition gradients (0, 8, and 40 kg N ha(-1) year(-1)) was performed in the Abies fabri dominated forest of Gongga Mountain, eastern Tibetan Plateau. The soil P fractions in organic layer and mineral layers (0-5, 5-10, 10-20 cm) were analyzed to reveal their responses to different N addition levels, and the key drivers regulating soil P availability under the N addition were also deciphered. Results and discussion The low N addition did not alter the concentrations of total P and its fractions in the soils, while the high N addition significantly increased the concentrations of bioavailable P (AP). The results of structure equation models suggest that the decrease in microbial biomass and energy demand (dissolved organic carbon, DOC) of microorganisms under high N addition probably promotes the turnover and release of organic P rather than P immobilization. Soil P fractions displayed a significant difference among the soil depths, while the N addition did not alter their vertical distribution patterns. Soil moisture, pH, soil organic carbon, DOC, and microbial biomass controlled the vertical distribution of AP, while the oxides or minerals of aluminum determined the variation in other P fractions. Conclusions High N deposition rate can promote soil P availability in the subalpine forest, while N addition did not alter the vertical distribution patterns of soil P, suggesting a strong regulation of initial conditions on its response sensitivity to N deposition. Although short-term N deposition dose not strongly alter soil P transformation in the subalpine forest, the varied availability of soil P needs to be concerned under the increasing N deposition rate in the future.
资助项目	National Natural Science Foundation of China[41977398] ; National Natural Science Foundation of China[41630751] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2017424] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2018406]
WOS关键词	ORGANIC PHOSPHORUS ; MICROBIAL BIOMASS ; CONIFEROUS FORESTS ; SW CHINA ; DEPOSITION ; CARBON ; ECOSYSTEM ; PHOSPHATE ; STOICHIOMETRY ; ACIDIFICATION
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000693705800003
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/56233]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Bing, Haijian
作者单位	1.Univ Chinese Acad Sci, Beijing 10049, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Liu, Ye,Bing, Haijian,Wu, Yanhong,et al. Nitrogen addition promotes soil phosphorus availability in the subalpine forest of eastern Tibetan Plateau[J]. JOURNAL OF SOILS AND SEDIMENTS,2021:11.
APA	Liu, Ye.,Bing, Haijian.,Wu, Yanhong.,Zhu, He.,Tian, Xin.,...&Chang, Ruiying.(2021).Nitrogen addition promotes soil phosphorus availability in the subalpine forest of eastern Tibetan Plateau.JOURNAL OF SOILS AND SEDIMENTS,11.
MLA	Liu, Ye,et al."Nitrogen addition promotes soil phosphorus availability in the subalpine forest of eastern Tibetan Plateau".JOURNAL OF SOILS AND SEDIMENTS (2021):11.