C/P stoichiometry of dying rice root defines the spatial distribution and dynamics of enzyme activities in root-detritusphere

doi:10.1007/s00374-019-01345-y

	C/P stoichiometry of dying rice root defines the spatial distribution and dynamics of enzyme activities in root-detritusphere
	Wei, Xiaomeng 1,2,3; Razavi, Bahar S.1,2,4; Hu, Yajun 1,2; Xu, Xingliang 5; Zhu, Zhenke 1,2; Liu, Yuhuai 1,2; Kuzyakov, Yakov 1,2,6; Li, Yong 1,2; Wu, Jinshui 1,2; Ge, Tida 1,2
刊名	BIOLOGY AND FERTILITY OF SOILS
	2019-04-01
卷号	55 期号:3 页码:251-263
关键词	P fertilisation Root-detritus C/P ratio C/P acquisition ratio Hotspot areas Hot moments Root-detritusphere Soil zymography
ISSN号	0178-2762
DOI	10.1007/s00374-019-01345-y
通讯作者	Ge, Tida(gtd@isa.ac.cn)
英文摘要	As the primary microbial substrate after shoot cutting, the element stoichiometry of root-detritus (dying or dead roots) influences the enzyme activity in root-detritusphere. However, the effect of the C/P ratio of root-detritus on the dynamics and distribution of enzyme activities is little revealed. We hypothesised that P fertilisation would decrease the C/P ratio of root-detritus, therefore affecting the hotspot areas and hot moments of C-acquiring and P-acquiring enzyme activities, as well as their activity ratio (C/P acquisition ratio). Root-detritus of low (59.0) and high (170.8) C/P ratios was produced in P-poor soil with and without P fertilisation, respectively. In situ soil zymography showed that the distribution of C-acquiring enzymes (-glucosidase and cellobiohydrolase) was more associated with root-detritus than P-acquiring enzymes (acid and alkaline phosphomonoesterase). P fertilisation increased the hotspot areas of C-acquiring enzyme activities over the experiment, without influencing their temporal dynamics. However, its effect on phosphomonoesterase activities depended on the decomposition and delayed the appearance of the highest hotspot areas. P supply met the microbial demand in P-fertilised soil, with high C/P acquisition ratio and constant stoichiometry of microbial biomass C (MBC)/microbial biomass P (MBP). A low C/P acquisition ratio and high MBC/MBP in non-fertilised soil was observed, indicating P limitation for microorganisms. After the 150-day incubation, Olsen P significantly increased in P-fertilised soil (P<0.05), whereas it decreased in the root-detritusphere of non-fertilised soil. We conclude that the decomposition of root-detritus with a low C/P ratio has potential to improve soil P availability; however, C-P imbalance may increase during the decomposition of root-detritus with a high C/P ratio.
资助项目	National Key Research and Development Program of China[2016YFE0101100] ; National Key Research and Development Program of China[2017YFD0800104] ; National Natural Science Foundation of China[41430860] ; National Natural Science Foundation of China[41811540031] ; National Natural Science Foundation of China[41761134095] ; Youth Innovation Team Project of the Institute of Subtropical Agriculture, Chinese Academy of Sciences[2017QNCXTD_GTD] ; Hunan Province Base for Scientific and Technological Innovation Cooperation[2018WK4012] ; Chinese Academy of Sciences President's International Fellowship Initiative[2018VCC0011]
WOS关键词	SOIL ORGANIC-MATTER ; N-P STOICHIOMETRY ; MICROBIAL BIOMASS ; ECOENZYMATIC STOICHIOMETRY ; PADDY SOIL ; EXTRACELLULAR ENZYMES ; NUTRIENT LIMITATION ; RESOURCE-ALLOCATION ; COMMUNITY STRUCTURE ; MANURE APPLICATION
WOS研究方向	Agriculture
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000461142200006
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Youth Innovation Team Project of the Institute of Subtropical Agriculture, Chinese Academy of Sciences ; Hunan Province Base for Scientific and Technological Innovation Cooperation ; Chinese Academy of Sciences President's International Fellowship Initiative
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/49223]
专题	中国科学院地理科学与资源研究所
通讯作者	Ge, Tida
作者单位	1.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China 2.Chinese Acad Sci, Inst Subtrop Agr, Changsha Res Stn Agr & Environm Monitoring, Changsha 410125, Hunan, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Christian Albrechts Univ Kiel, Inst Plant Nutr & Soil Sci, Kiel, Germany 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observ & Modeling, Beijing 100101, Peoples R China 6.Kazan Fed Univ, Inst Environm Sci, Kazan 420049, Russia
推荐引用方式 GB/T 7714	Wei, Xiaomeng,Razavi, Bahar S.,Hu, Yajun,et al. C/P stoichiometry of dying rice root defines the spatial distribution and dynamics of enzyme activities in root-detritusphere[J]. BIOLOGY AND FERTILITY OF SOILS,2019,55(3):251-263.
APA	Wei, Xiaomeng.,Razavi, Bahar S..,Hu, Yajun.,Xu, Xingliang.,Zhu, Zhenke.,...&Ge, Tida.(2019).C/P stoichiometry of dying rice root defines the spatial distribution and dynamics of enzyme activities in root-detritusphere.BIOLOGY AND FERTILITY OF SOILS,55(3),251-263.
MLA	Wei, Xiaomeng,et al."C/P stoichiometry of dying rice root defines the spatial distribution and dynamics of enzyme activities in root-detritusphere".BIOLOGY AND FERTILITY OF SOILS 55.3(2019):251-263.