气候变化领域集成服务门户(CCPortal): Warming and grazing increase mineralization of organic P in an alpine meadow ecosystem of Qinghai-Tibet Plateau, China

CCPortal

DOI	10.1007/s11104-012-1132-8
	Warming and grazing increase mineralization of organic P in an alpine meadow ecosystem of Qinghai-Tibet Plateau, China
	Rui, Yichao; Wang, Yanfen; Chen, Chengrong; Zhou, Xiaoqi; Wang, Shiping; Xu, Zhihong; Duan, Jichuang; Kang, Xiaoming; Lu, Shunbao; Luo, Caiyun
通讯作者	Wang, YF (通讯作者)
发表日期	2012
ISSN	0032-079X
EISSN	1573-5036
起始页码	73
结束页码	87
卷号	357 期号:1-2
英文摘要	Little is known about the soil phosphorus (P) biogeochemical cycling in response to combined warming and grazing, especially in the alpine meadow ecosystem of the Qinghai-Tibet Plateau. Here, we used a free-air temperature enhancement system in a controlled warming-grazing experiment to test the hypothesis that combined warming and grazing would significantly accelerate mineralization of soil organic P. A two factorial design of warming (1.2-1.7A degrees C temperature increase) and moderate grazing was utilized. A fractionation method was applied to investigate the sizes of different soil inorganic and organic P fractions. Results showed that both warming and grazing significantly decreased the quantity of organic P extracted by first NaOH (N(I)Po), as well as the total extractable organic P (TPo) at the 0-10 cm depth. Warming also decreased the total P of soil at 0-10 cm. The combined warming and grazing treatment (WG) led to the reduction of major soil organic P fractions (N(I)Po, TPo) by 40-48% and 28-32%, respectively compared with other treatments at 0-10 cm. The activities of acid and alkaline phosphomonoesterase (AcPME and AlPME) were both enhanced by warming and grazing, and their interaction. Decreased concentrations of soil N(I)Po and TPo were accompanied by increased AcPME activity (P < 0.01) and soil temperature (P < 0.05), indicating the enhanced mineralization of organic P under rising temperature. Meanwhile, leaf biomass P of two major species (Potentilla anserine and Gentiana straminea) within these plots were significantly enhanced by either grazing or warming. The microbial mineralization of soil organic P could be strongly increased under combined warming and grazing conditions as driven by increasing plant demand for P and enhanced microbial activities.
关键词	UPLAND SOILS PHOSPHATASE-ACTIVITY COMMUNITY STRUCTURE MICROBIAL BIOMASS NITROGEN DYNAMICS ENZYME-ACTIVITY CLIMATE-CHANGE CATTLE MANURE PHOSPHORUS TEMPERATURE
英文关键词	Warming; Grazing; Alpine meadow; Soil phosphorus cycling; Soil phosphatase activities
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:000306552700008
来源期刊	PLANT AND SOIL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258017
推荐引用方式 GB/T 7714	Rui, Yichao,Wang, Yanfen,Chen, Chengrong,et al. Warming and grazing increase mineralization of organic P in an alpine meadow ecosystem of Qinghai-Tibet Plateau, China[J]. 中国科学院青藏高原研究所,2012,357(1-2).
APA	Rui, Yichao.,Wang, Yanfen.,Chen, Chengrong.,Zhou, Xiaoqi.,Wang, Shiping.,...&Luo, Caiyun.(2012).Warming and grazing increase mineralization of organic P in an alpine meadow ecosystem of Qinghai-Tibet Plateau, China.PLANT AND SOIL,357(1-2).
MLA	Rui, Yichao,et al."Warming and grazing increase mineralization of organic P in an alpine meadow ecosystem of Qinghai-Tibet Plateau, China".PLANT AND SOIL 357.1-2(2012).