IMPACTS OF VEGETATION TYPE ON SOIL PHOSPHORUS AVAILABILITY AND FRACTIONS NEAR THE ALPINE TIMBERLINE OF THE TIBETAN PLATEAU

	IMPACTS OF VEGETATION TYPE ON SOIL PHOSPHORUS AVAILABILITY AND FRACTIONS NEAR THE ALPINE TIMBERLINE OF THE TIBETAN PLATEAU
	Zhang, Lin ; Wu, Yan ; Wu, Ning ; Luo, Peng ; Liu, Lin ; Hu, Hong Yu
刊名	POLISH JOURNAL OF ECOLOGY
	2011
卷号	59 期号:2 页码:307-316
关键词	phosphorus availability phosphorus fractions vegetation type alpine timberline Tibetan Plateau
ISSN号	1505-2249
通讯作者	Zhang, L (reprint author), Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
产权排序	1
英文摘要	Soil phosphorus (P) availability and fractions are influenced to a large extent by land use and cover changes. Inorganic P (IP) and organic P (OP) fractions in surface soils (0-20 cm) under typical vegetation types, including subalpine coniferous forests, alpine shrubs, and alpine shrub-meadows, near the alpine timberline of the eastern Tibetan Plateau of China, were measured by a modified Hedley fraction method. The results showed that OP is the dominant soil P fraction and the main source of available P in alpine soils near the timberline. Soil organic carbon, total nitrogen, and total P contents were higher in subalpine coniferous forests than in alpine shrubs and alpine shrub-meadows. Concentrations of soil labile P (the sums of Resin-IP, NaHCO3-IP, and NaHCO3-OP) were higher in subalpine coniferous forests than in alpine shrubs and alpine shrub-meadows, an observation that may be partially ascribed to the presence of deep litter layers generated by trees. Concentrations of soil labile and moderately organic P (NaHCO3-OP and NaOH-OP) in subalpine coniferous forests were also greater than in alpine shrubs and alpine shrub-meadows. Greater amounts of soil stable OP (extracted by concentrated HCl and cHCl-OP) were accumulated in alpine shrub-meadows compared to alpine shrubs or subalpine coniferous forests. The reduced availability of OP may be attributed mainly to increasing recalcitrant soil organic matter input in alpine shrub-meadows and alpine shrubs. Concentrations of IP associated with Ca minerals and parent materials (extracted by diluted HCl and HCl-IP, and extracted by concentrated HCl and cHCl-IP, respectively) were lower in subalpine coniferous forests, indicating that coniferous forests are more likely to use recalcitrant IP than alpine shrubs and alpine shrub-meadows. In this alpine region, land cover changes from subalpine coniferous forests to alpine shrubs and alpine shrub-meadows near the alpine timberline could decrease soil P conservation, availability, and supplementation.
学科主题	Environmental Sciences & Ecology
收录类别	SCI
资助信息	National Natural Science Foundation of China[30870396, 40671181, 40971178]; Chinese Academy of Sciences[KZCX2-XB2-02, KSCX2-YW-Z-0959]
语种	英语
WOS记录号	WOS:000292017900009
公开日期	2012-11-09
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/23467]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Zhang, Lin,Wu, Yan,Wu, Ning,et al. IMPACTS OF VEGETATION TYPE ON SOIL PHOSPHORUS AVAILABILITY AND FRACTIONS NEAR THE ALPINE TIMBERLINE OF THE TIBETAN PLATEAU[J]. POLISH JOURNAL OF ECOLOGY,2011,59(2):307-316.
APA	Zhang, Lin,Wu, Yan,Wu, Ning,Luo, Peng,Liu, Lin,&Hu, Hong Yu.(2011).IMPACTS OF VEGETATION TYPE ON SOIL PHOSPHORUS AVAILABILITY AND FRACTIONS NEAR THE ALPINE TIMBERLINE OF THE TIBETAN PLATEAU.POLISH JOURNAL OF ECOLOGY,59(2),307-316.
MLA	Zhang, Lin,et al."IMPACTS OF VEGETATION TYPE ON SOIL PHOSPHORUS AVAILABILITY AND FRACTIONS NEAR THE ALPINE TIMBERLINE OF THE TIBETAN PLATEAU".POLISH JOURNAL OF ECOLOGY 59.2(2011):307-316.