Carbon demand drives microbial mineralization of organic phosphorus during the early stage of soil development

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Carbon demand drives microbial mineralization of organic phosphorus during the early stage of soil development
	Wang, Jipeng1,2 ; Wu, Yanhong1 ; Zhou, Jun1 ; Bing, Haijian1 ; Sun, Hongyang1
刊名	BIOLOGY AND FERTILITY OF SOILS
	2016-08-01
卷号	52 期号:6 页码:825-839
关键词	Hailuogou Chronosequence Carbon and phosphorus mineralization Phosphorus availability Acid and alkaline phosphomonoesterase beta-glucosidase
ISSN号	0178-2762
通讯作者	Wu, Yanhong
英文摘要	Despite that organic phosphorus (Po) is a source of bioavailable P during the early stage of soil development, it remains unclear whether P availability or organic carbon (C) mineralization is the main regulator of Po mineralization. In this study, the P availability (labile inorganic P, Pi) and the potential organic C mineralization (beta-glucosidase activity) were investigated at the Hailuogou Chronosequence and a reference site (35-125 and similar to 1400 years after glacier retreat, respectively) to decipher their relationships with the potential Po mineralization (acid and alkaline phosphomonoesterase activities). Labile Pi displayed no trend in the soil profile, whereas it was significantly higher at the reference site than the young sites. Enzyme activities decreased down the soil profile, but this trend weakened for specific activities (enzyme activity per microbial biomass C). Enzyme activities and specific activities displayed no trend with the succession stage. Potential Po mineralization was more related to potential organic C mineralization (R (2) = 0.41-0.69, p < 0.0001) than P availability (R (2) = 0.05-0.09, p a parts per thousand currency signaEuro parts per thousand 0.05). By increasing the specific activity of beta-glucosidase, the microbial biomass C:P ratio decreased to reach the value of 8:1. Probably, the phosphate in the excess of microbial demand was released as the by-product of C mineralization. At the young sites of the chronosequence, the significant correlation between Po and C concentrations in the surface mineral horizon (R (2) = 0.85, p < 0.0001) suggested that the mineralizations of Po and organic C were linked to each other. The results suggested that the demand for C may drive the microbial mineralization of soil Po during the early stage of soil development, and the phosphate released by the Po mineralization may serve as a potential source of labile Pi for plants.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Soil Science
研究领域[WOS]	Agriculture
关键词[WOS]	PHOSPHATASE-ACTIVITY ; P AVAILABILITY ; ECOENZYMATIC STOICHIOMETRY ; TERRESTRIAL ECOSYSTEMS ; COMMUNITY COMPOSITION ; BIOMASS PHOSPHORUS ; ENZYME-ACTIVITIES ; GLACIER FORELAND ; TIBETAN PLATEAU ; OXYGEN ISOTOPES
收录类别	SCI
语种	英语
WOS记录号	WOS:000380126600007
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17668]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, 9,Block 4,Renminnanlu Rd, Chengdu 610041, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jipeng,Wu, Yanhong,Zhou, Jun,et al. Carbon demand drives microbial mineralization of organic phosphorus during the early stage of soil development[J]. BIOLOGY AND FERTILITY OF SOILS,2016,52(6):825-839.
APA	Wang, Jipeng,Wu, Yanhong,Zhou, Jun,Bing, Haijian,&Sun, Hongyang.(2016).Carbon demand drives microbial mineralization of organic phosphorus during the early stage of soil development.BIOLOGY AND FERTILITY OF SOILS,52(6),825-839.
MLA	Wang, Jipeng,et al."Carbon demand drives microbial mineralization of organic phosphorus during the early stage of soil development".BIOLOGY AND FERTILITY OF SOILS 52.6(2016):825-839.