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Warming and grazing increase mineralization of organic P in an alpine meadow ecosystem of Qinghai-Tibet Plateau, China

文献类型：期刊论文

作者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
刊名plant and soil
出版日期2012-08-01
卷号357期号:1-2页码:73-87
关键词Warming Grazing Alpine meadow Soil phosphorus cycling Soil phosphatase activities
ISSN号0032-079x
中文摘要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.
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.
WOS标题词science & technology ; life sciences & biomedicine
类目[WOS]agronomy ; plant sciences ; soil science
研究领域[WOS]agriculture ; plant sciences
关键词[WOS]wet tropical forest ; climate-change ; upland soils ; mediterranean shrubland ; phosphatase-activity ; nitrogen deposition ; community structure ; microbial biomass ; grassland soils ; enzyme-activity
收录类别SCI
语种英语
WOS记录号WOS:000306552700008
公开日期2013-03-15
源URL[http://ir.nwipb.ac.cn/handle/363003/3638]  
专题西北高原生物研究所_中国科学院西北高原生物研究所
作者单位1.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
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]. 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.

入库方式： OAI收割

来源：西北高原生物研究所

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