Effect of soil sealing on the microbial biomass, N transformation and related enzyme activities at various depths of soils in urban area of Beijing, China

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Effect of soil sealing on the microbial biomass, N transformation and related enzyme activities at various depths of soils in urban area of Beijing, China
	Zhao, Dan ; Li, Feng ; Wang, Rusong ; Yang, Qingrui ; Ni, Hongshan
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2012
卷号	12 期号:4 页码:519－530
关键词	Enzyme activity N mineralization Sealing of soils Soil microbial biomass Urban
ISSN号	1439-0108
中文摘要	Sealing of soils prevents the exchange of gas, water and nutrient between soil and other environmental compartments, and affects urban N flux, thereby resulting in certain negative impacts on soil functioning and urban environment. However, little information is available on the biogeochemical cycling and biological activities after sealing of soils in urban areas. The aim of this study was to assess the effects of soil sealing on N transformation and associated microbial properties. Soil samples were collected at four depths (0-10, 10-20, 20-30, 30-40 cm) from three land cover types: impervious land (sealing of soil), forest (vegetation) and bare land (no sealing and no vegetation) in Beijing, China. Soil inorganic N, net potential N-mineralization and nitrification rates, physicochemical properties, microbial biomass and activities of urease, protease and nitrate reductase were analyzed. Sealing of soils affected soil physicochemical properties, nutrient availability and microbial characterizations, which resulted in the reduction of soil net potential mineralization and nitrification. Soil pH and C/N ratio were increased while soil organic matter and total N were decreased after sealing of soils, especially in the 0-10 cm layer. Impervious sites had the lowest soil microbial biomass C (10.52-26.26 mg kg(-1)) and N (10.52-26.26 mg kg(-1)) among the three types of soils. In addition, microbial biomass increased along the depth gradient. Soil enzyme activities were also significantly affected by sealing of soils. Canonical correlation analysis suggested that reduction of soil net potential mineralization and nitrification in impervious sites was mainly caused by the variation of soil total N, soil organic matter and soil microbial biomass. Sealing of soils remarkably influenced the soil N transformation process and soil microbial activities in urban areas. Thus, our results suggested that reducing the negative effects of soil sealing on paved and unpaved areas could be useful measures to improve urban soil functions, and hence facilitate the remediation of the adverse impacts caused by urban N deposition.
WOS记录号	WOS:000302418100007
公开日期	2014-11-05
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/7873]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Zhao, Dan,Li, Feng,Wang, Rusong,et al. Effect of soil sealing on the microbial biomass, N transformation and related enzyme activities at various depths of soils in urban area of Beijing, China[J]. JOURNAL OF SOILS AND SEDIMENTS,2012,12(4):519－530.
APA	Zhao, Dan,Li, Feng,Wang, Rusong,Yang, Qingrui,&Ni, Hongshan.(2012).Effect of soil sealing on the microbial biomass, N transformation and related enzyme activities at various depths of soils in urban area of Beijing, China.JOURNAL OF SOILS AND SEDIMENTS,12(4),519－530.
MLA	Zhao, Dan,et al."Effect of soil sealing on the microbial biomass, N transformation and related enzyme activities at various depths of soils in urban area of Beijing, China".JOURNAL OF SOILS AND SEDIMENTS 12.4(2012):519－530.