NWIPB OpenIR
Warming and grazing increase mineralization of organic P in an alpine meadow ecosystem of Qinghai-Tibet Plateau, China
Rui, Yichao1,2,3; Wang, Yanfen1; Chen, Chengrong2,4; Zhou, Xiaoqi1,2,3; Wang, Shiping5; Xu, Zhihong2,3; Duan, Jichuang2,3,6; Kang, Xiaoming1; Lu, Shunbao2,3; Luo, Caiyun6
2012-08-01
Source PublicationPLANT AND SOIL
ISSN0032-079X
Volume357Issue:1-2Pages:73-87
SubtypeArticle
AbstractLittle 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.; 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.
KeywordWarming Grazing Alpine Meadow Soil Phosphorus Cycling Soil Phosphatase Activities
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS KeywordWET TROPICAL FOREST ; CLIMATE-CHANGE ; UPLAND SOILS ; MEDITERRANEAN SHRUBLAND ; PHOSPHATASE-ACTIVITY ; NITROGEN DEPOSITION ; COMMUNITY STRUCTURE ; MICROBIAL BIOMASS ; GRASSLAND SOILS ; ENZYME-ACTIVITY
Indexed BySCI
Language英语
WOS Research AreaAgriculture ; Plant Sciences
WOS SubjectAgronomy ; Plant Sciences ; Soil Science
WOS IDWOS:000306552700008
Citation statistics
Cited Times:27[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/3638
Collection中国科学院西北高原生物研究所
Affiliation1.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
2.Griffith Univ, Environm Futures Ctr, Brisbane, Qld 4111, Australia
3.Griffith Univ, Sch Biomol & Phys Sci, Brisbane, Qld 4111, Australia
4.Griffith Univ, Griffith Sch Environm, Brisbane, Qld 4111, Australia
5.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China
6.Chinese Acad Sci, Key Lab Adaptat & Evolut Plateau Biota, NW Inst Plateau Biol, Xining 810008, Peoples R China
Recommended Citation
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]. PLANT AND SOIL,2012,357(1-2):73-87.
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),73-87.
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):73-87.
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