Alteration of soil carbon and nitrogen pools and enzyme activities as affected by increased soil coarseness

doi:10.1016/j.scitotenv.2017.07.133

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	Alteration of soil carbon and nitrogen pools and enzyme activities as affected by increased soil coarseness
	Wang, Ruzhen ; Lu, Linyou 5; Creamer, Courtney A.; Dijkstra, Feike A.; Liu, Heyong ; Feng, Xue ; Yu, Guoqing 5; Han, Xingguo 3; Jiang, Yong
刊名	BIOGEOSCIENCES
	2017
卷号	14 期号:8 页码:2155-2166
ISSN号	1726-4170
DOI	10.1016/j.scitotenv.2017.07.133
文献子类	Article
英文摘要	Soil coarseness decreases ecosystem productivity, ecosystem carbon (C) and nitrogen (N) stocks, and soil nutrient contents in sandy grasslands subjected to desertification. To gain insight into changes in soil C and N pools, microbial biomass, and enzyme activities in response to soil coarseness, a field experiment was conducted by mixing native soil with river sand in different mass proportions: 0, 10, 30, 50, and 70% sand addition. Four years after establishing plots and 2 years after transplanting, soil organic C and total N concentrations decreased with increased soil coarseness down to 32.2 and 53.7% of concentrations in control plots, respectively. Soil microbial biomass C (MBC) and N (MBN) declined with soil coarseness down to 44.1 and 51.9 %, respectively, while microbial biomass phosphorus (MBP) increased by as much as 73.9 %. Soil coarseness significantly decreased the enzyme activities of beta-glucosidase, N-acetylglucosaminidase, and acid phosphomonoesterase by 20.2-57.5 %, 24.5-53.0 %, and 22.2-88.7 %, used for C, N and P cycling, respectively. However, observed values of soil organic C, dissolved organic C, total dissolved N, available P, MBC, MBN, and MBP were often significantly higher than would be predicted from dilution effects caused by the sand addition. Soil coarseness enhanced microbial C and N limitation relative to P, as indicated by the ratios of beta-glucosidase and N-acetyl-glucosaminidase to acid phosphomonoesterase (and MBC: MBP and MBN: MBP ratios). Enhanced microbial recycling of P might alleviate plant P limitation in nutrient-poor grassland ecosystems that are affected by soil coarseness. Soil coarseness is a critical parameter affecting soil C and N storage and increases in soil coarseness can enhance microbial C and N limitation relative to P, potentially posing a threat to plant productivity in sandy grasslands suffering from desertification.
学科主题	Environmental Sciences & Ecology
电子版国际标准刊号	1726-4189
出版地	GOTTINGEN
WOS关键词	ALTERED PRECIPITATION REGIMES ; MICROBIAL BIOMASS CARBON ; ORGANIC-MATTER ; WATER ADDITION ; INNER-MONGOLIA ; CLIMATE-CHANGE ; PHOSPHORUS ; DESERTIFICATION ; STOICHIOMETRY ; LAND
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000410352900005
资助机构	National Key Research and Development Program of China [2016YFC0500707]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/22080]
专题	植被与环境变化国家重点实验室
作者单位	1.Liaoning Acad Agr Sci, Inst Sandy Land Improvement & Utilizat, Fuxing 123000, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Dijkstra, Feike A.] Univ Sydney, Sch Life & Environm Sci, Ctr Carbon Water & Food, Sydney, NSW 2006, Australia 4.Creamer, Courtney A.] US Geol Survey, 345 Middlefield Rd, Menlo Pk, CA 94025 USA 5.Chinese Acad Sci, Inst Appl Ecol, State Engn Lab Soil Nutrient Management, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ruzhen,Lu, Linyou,Creamer, Courtney A.,et al. Alteration of soil carbon and nitrogen pools and enzyme activities as affected by increased soil coarseness[J]. BIOGEOSCIENCES,2017,14(8):2155-2166.
APA	Wang, Ruzhen.,Lu, Linyou.,Creamer, Courtney A..,Dijkstra, Feike A..,Liu, Heyong.,...&Jiang, Yong.(2017).Alteration of soil carbon and nitrogen pools and enzyme activities as affected by increased soil coarseness.BIOGEOSCIENCES,14(8),2155-2166.
MLA	Wang, Ruzhen,et al."Alteration of soil carbon and nitrogen pools and enzyme activities as affected by increased soil coarseness".BIOGEOSCIENCES 14.8(2017):2155-2166.