Stoichiometry of soil extracellular enzyme activity along a climatic   transect in temperate grasslands of northern China

doi:10.1016/j.soilbio.2016.04.008

CORC > 北京大学 > 城市与环境学院

	Stoichiometry of soil extracellular enzyme activity along a climatic transect in temperate grasslands of northern China
	Peng, Xiaoqian ; Wang, Wei
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2016
关键词	Ecological stoichiometry Soil extracellular enzyme Temperate grassland Soil depth MICROBIAL COMMUNITY COMPOSITION NET PRIMARY PRODUCTIVITY EXTRACTION METHOD ECOENZYMATIC STOICHIOMETRY SEMIARID GRASSLAND TEMPORAL VARIATION NITROGEN POOLS FOREST SOILS BIOMASS CARBON
DOI	10.1016/j.soilbio.2016.04.008
英文摘要	Ratios of specific carbon (C), nitrogen(N) and phosphorus (P) acquisition activities converged on 1:1:1 at a global scale and in tropical ecosystems. It is less clear if this pattern can be applied in temperate grasslands. The questions of whether the pattern remains stable across different soil depths and what the relative contributions are from the influence of climatic, edaphic abiotic and biotic factors on soil extracellular enzyme activity (EEA) stoichiometry remain uncertain. We measured potential activities of one C-acquiring enzyme (beta-1, 4-glucosidase), two N-acquiring enzymes (beta-N-acetylglucosaminidase and leucine aminopeptidase) and one organic P-acquiring enzyme (acid phosphatase) and major influential factors along a climatic transect in temperate grasslands of northern China during the growing season of 2013. We found lower enzyme C: N (0.47) and C: P (0.18) ratios and a higher enzyme N: P activity ratio (0.40) in 0-20 cm soil depth in temperate grasslands than in tropical soils (C: N, 1.83; C:P, 0.21; N: P, 0.13). The enzyme C: N and C: P ratios decreased with soil depth except for the enzyme C: N ratio in desert steppes. However, there were no significant differences in enzyme N: P ratio with soil depth. Among all the factors, soil total C, N and P contents accounted for the most variation in soil EEA and ecoenzymatic stoichiometry in 0-10 cm surface soil, which implied that soil EEA stoichiometry was largely controlled by soil nutrient stoichiometry. Moreover, edaphic factors had less influence on soil EEA stoichiometry in subsoil than in surface soil and edaphic abiotic factors had a larger effect on soil EEA stoichiometry than climatic and biotic factors. Our results suggest that soil extracellular enzyme activity ratios were not in homeostasis but resource dependent on soil and microbial biomass stoichiometry. (C) 2016 Elsevier Ltd. All rights reserved.; Projects of National Natural Science Foundation of China [31222011, 31270363, 31321061]; National Basic Research Program of China [2013CB956303]; Research Fund of State Key Laboratory of Soil and Sustainable Agriculture; Nanjing Institute of Soil Science; Chinese Academy of Science [Y412201439]; Central Authorities in Beijing; SCI(E); EI; ARTICLE; wangw@urban.pku.edu.cn; 74-84; 98
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/437118]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Peng, Xiaoqian,Wang, Wei. Stoichiometry of soil extracellular enzyme activity along a climatic transect in temperate grasslands of northern China[J]. SOIL BIOLOGY & BIOCHEMISTRY,2016.
APA	Peng, Xiaoqian,&Wang, Wei.(2016).Stoichiometry of soil extracellular enzyme activity along a climatic transect in temperate grasslands of northern China.SOIL BIOLOGY & BIOCHEMISTRY.
MLA	Peng, Xiaoqian,et al."Stoichiometry of soil extracellular enzyme activity along a climatic transect in temperate grasslands of northern China".SOIL BIOLOGY & BIOCHEMISTRY (2016).