Variations in soil phosphorus biogeochemistry across six vegetation types along an altitudinal gradient in SW China

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

	Variations in soil phosphorus biogeochemistry across six vegetation types along an altitudinal gradient in SW China
	Zhou, Jun; Wu, Yanhong; Bing, Haijian; Yang, Zijiang; Wang, Jipeng; Sun, Hongyang; Sun, Shouqin; Luo, Ji
刊名	CATENA
	2016-07-01
卷号	142 页码:102-111
关键词	Available phosphorus Phosphorus forms Nutrients cycling Geochemical processes Biological processes Mountain ecosystems
ISSN号	0341-8162
通讯作者	Wu, Yanhong
英文摘要	The impacts and relative importance of temperature, precipitation, lithology, soil properties, vegetation type and microbial activity on soil P biogeochemistry along altitudinal gradients are poorly understood. Our aim is to reveal the variations and main driving factors governing soil P forms across six different vegetation types along an altitudinal gradient (2032-4235 m asl) on Mt. Gongga, southwest China. Soil P forms were measured using a sequential fractionation technique. The results showed that the spatial distributions of total P and organic P clearly exhibited altitudinal variations along the gradient. The total P stocks in the 3838-4235 m zones were significantly higher than those in the 2032-3614 m zones. This pattern is likely influenced by climate, soil erosion, total P content in the parent material and vegetation type. Unlike the total P stock, the concentrations and stocks of available Pin the surface soils showed a parabolic pattern with altitude, with maximums at the 3060 m site and minimums at the lowest site. The Ca-Pi concentrations (extracted by 1 M HCl solutions) displayed a spatial pattern opposite to that of the available P. The NaOH-Pi concentrations changed little with altitude and accounted for a small part of the total P. The Ca-Pi represented the largest part of the total Pat the 2032 m site and in the alpine zones, whereas the organic P contributed the largest portion of total P in the sub-alpine zones. A redundancy analysis showed that the general spatial pattern of all the P forms was mainly related to soil pH, vegetation and soil organic matter. In particular, the soil pH, which was mainly controlled by vegetation type and precipitation, significantly influenced the altitudinal pattern of Ca-Pi. The effect of soil pH, perhaps coupled with the amount of P returned by litter production, is a crucial factor in the parabolic pattern of available P between 2032 and 4235 m asl. Furthermore, in the 3060-4235 m zone, temperature becomes an additional important factor governing the pattern of available P due to its influence on litter decomposition rates. These results emphasize the central role of vegetation in regulating soil P biogeochemistry along the altitudinal gradient by affecting soil properties and litter production. (C) 2016 Elsevier B.V. All rights reserved.
学科主题	元素地球化学 ; 生物地球化学 ; 土壤化学
WOS标题词	Science & Technology ; Physical Sciences ; Life Sciences & Biomedicine
类目[WOS]	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
研究领域[WOS]	Geology ; Agriculture ; Water Resources
关键词[WOS]	MONTANE FOREST SOILS ; GONGGA MOUNTAIN ; MICROBIAL BIOMASS ; NUTRIENT LIMITATION ; ORGANIC PHOSPHORUS ; GLACIER FORELAND ; RAIN-FOREST ; FRACTIONATION ; PEDOGENESIS ; CHRONOSEQUENCE
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S0341816216300844#
语种	英语
WOS记录号	WOS:000376714200009
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/14188]
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
作者单位	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	Zhou, Jun,Wu, Yanhong,Bing, Haijian,et al. Variations in soil phosphorus biogeochemistry across six vegetation types along an altitudinal gradient in SW China[J]. CATENA,2016,142:102-111.
APA	Zhou, Jun.,Wu, Yanhong.,Bing, Haijian.,Yang, Zijiang.,Wang, Jipeng.,...&Luo, Ji.(2016).Variations in soil phosphorus biogeochemistry across six vegetation types along an altitudinal gradient in SW China.CATENA,142,102-111.
MLA	Zhou, Jun,et al."Variations in soil phosphorus biogeochemistry across six vegetation types along an altitudinal gradient in SW China".CATENA 142(2016):102-111.