Knowledge Management System of Northwest Institute of Plateau Biology, CAS
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 | |
发表期刊 | PLANT AND SOIL
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ISSN | 0032-079X |
卷号 | 357期号:1-2页码:73-87 |
文章类型 | Article |
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.; 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. |
关键词 | Warming Grazing Alpine Meadow Soil Phosphorus Cycling Soil Phosphatase Activities |
WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
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研究方向 | Agriculture ; Plant Sciences |
WOS类目 | Agronomy ; Plant Sciences ; Soil Science |
WOS记录号 | WOS:000306552700008 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://210.75.249.4/handle/363003/3638 |
专题 | 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. |
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