Phosphorus addition alters the response of soil organic carbon decomposition to nitrogen deposition in a subtropical forest

doi:10.1016/j.soilbio.2019.03.005

	Phosphorus addition alters the response of soil organic carbon decomposition to nitrogen deposition in a subtropical forest
	Fang, Xiang-Min 1,4; Zhang, Xiu-Lan 1,4; Chen, Fu-Sheng 1,4; Zong, Ying-Ying 4; Bu, Wen-Sheng 1,4; Wan, Song-Ze 1,4; Luo, Yiqi 2; Wang, Huimin 3
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2019-06-01
卷号	133 页码:119-128
关键词	Phosphorus addition Nitrogen deposition Soil organic carbon decomposition Soil microbial community C-13 natural abundance Subtropical forest
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2019.03.005
通讯作者	Chen, Fu-Sheng(chenfush@yahoo.com)
英文摘要	The continuous increase of nitrogen (N) deposition may exacerbate phosphorus (P) deficiency, which affects soil organic carbon (SOC) decomposition by changing microbial community characteristics in subtropical forests with highly weathered soils. However, there is currently little information about the role of P and the N x P interaction in SOC dynamics. Here, a field nutrient manipulation experiment was established in a subtropical plantation forest in China. Soils collected from simulated N deposition and P addition treatments for 5 years were incubated at 25 degrees C for 130 days. Soil microbial composition was measured using the phospholipid fatty acid method and the enzyme activities related to SOC hydrolysis were measured. The SOC concentration and delta C-13 in bulk soil and three particle-size fracfractions were also determined. The cumulative CO2 respired over 9 days, representing the utilization of carbon sources under field conditions, increased with N deposition levels under the without-P treatment, while no significant differences were found among the three N deposition levels in the with-P treatment. Meanwhile, P addition generally suppressed the SOC decomposition during 130 days incubation. Similarly, P addition decreased the potential organic carbon decomposition (C-0) and C-0/SOC ratio. In contrast, C-0 increased with N deposition in the without-P treatment, while was unaffected by N deposition under the with-P treatment, suggesting the response of SOC decomposition to N deposition was affected following P addition by alteration of SOC quality. Moreover, N deposition tended to deplete the delta C-13 of the SOC and P addition enriched the delta C-13 of the macro-particulate organic carbon. Addition of P increased total microbial, fungal and bacterial biomass values by 41.6%, 90.0% and 46.9%, respectively, whereas N deposition had no significant effect. Soil fungi/bacteria ratio significantly increased by N deposition and P addition, which partly explained the reduction of SOC decomposition after P addition. The cellobioside activity significantly decreased by 48.3% after P addition, while cellobioside and beta-xylosidase activities increased with N deposition, suggesting that N deposition and P addition had opposite roles in the SOC stability. These results indicate that the positive effect of N deposition on SOC decomposition was suppressed when P was added by changing microbial community and enzyme activity and enhanced P availability may result in increased SOC accumulation under N deposition scenarios in subtropical forests.
资助项目	National Key Research and Development Program of China[2016YFD0600202-2] ; National Natural Science Foundation of China[31760200] ; National Natural Science Foundation of China[31870427] ; Jiangxi Provincial Department of Science and Technology[20181BAB214014] ; Jiangxi Provincial Department of Science and Technology[20165BCB19006] ; State Scholarship Fund of China[[2017] 5087]
WOS关键词	MICROBIAL COMMUNITIES ; ENZYME-ACTIVITIES ; N DEPOSITION ; RESPIRATION ; LIMITATION ; DYNAMICS ; TEMPERATE ; DIVERSITY ; TURNOVER ; SEQUESTRATION
WOS研究方向	Agriculture
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000487001800014
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Jiangxi Provincial Department of Science and Technology ; State Scholarship Fund of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/69573]
专题	中国科学院地理科学与资源研究所
通讯作者	Chen, Fu-Sheng
作者单位	1.Jiangxi Agr Univ, Key Lab Natl Forestry & Grassland Adm Forest Ecos, Nanchang 330045, Jiangxi, Peoples R China 2.No Arizona Univ, Ctr Ecosyst Sci & Soc Ecoss, Flagstaff, AZ 86011 USA 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Qianyanzhou Ecol Stn, Beijing 100101, Peoples R China 4.Jiangxi Agr Univ, Coll Forestry, Jiangxi Prov Key Lab Silviculture, Nanchang 330045, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Fang, Xiang-Min,Zhang, Xiu-Lan,Chen, Fu-Sheng,et al. Phosphorus addition alters the response of soil organic carbon decomposition to nitrogen deposition in a subtropical forest[J]. SOIL BIOLOGY & BIOCHEMISTRY,2019,133:119-128.
APA	Fang, Xiang-Min.,Zhang, Xiu-Lan.,Chen, Fu-Sheng.,Zong, Ying-Ying.,Bu, Wen-Sheng.,...&Wang, Huimin.(2019).Phosphorus addition alters the response of soil organic carbon decomposition to nitrogen deposition in a subtropical forest.SOIL BIOLOGY & BIOCHEMISTRY,133,119-128.
MLA	Fang, Xiang-Min,et al."Phosphorus addition alters the response of soil organic carbon decomposition to nitrogen deposition in a subtropical forest".SOIL BIOLOGY & BIOCHEMISTRY 133(2019):119-128.