Contrasting responses of phosphatase kinetic parameters to nitrogen and phosphorus additions in forest soils
Zhang, XY; Yang, Y; Zhang, C; Niu, SL; Yang, H; Yu, GR; Wang, HM; Blagodatskaya, E; Kuzyakov, Y; Tian, DS; Tang, YQ; Liu, S; Sun, XM
2018
Source PublicationFUNCTIONAL ECOLOGY
ISSN0269-8463
Volume32Issue:1Pages:106-116
AbstractGlobal changes include increasing nitrogen (N) and phosphorus (P) deposition, which affect microbial nutrient demand and biogeochemical cycles. The responses of P-mineralizing enzymes to these global change components are poorly defined and are not specified in forest soils differing in P content. We chose one site in a P-rich and two sites in P-poor forests and established sixteen 20x20m plots at each site. Control, either N only, P only, or combined N and P, were randomly distributed through each forest site with four replicates. We investigated the effects of N and P additions over 4 years on the phosphomonoesterase potential activity (V-max), its half-saturation constant (K-m) and its catalytic efficiency (V-max/K-m). Without N and P additions, the enzyme kinetic parameters V-max, K-m and V-max/K-m were higher in P-rich than in P-poor forest soils. These parameters increased with soil pH, SOC, TN and TP contents increased. Remarkably, P additions caused the V-max and K-m to increase in P-rich soils, but had no effect on V-max/K-m. P additions to P-poor soils resulted in a decrease in the V-max/K-m via the inhibitory effects of inorganic P on the V-max. N additions had no effect on the V-max/K-m in P-rich and P-poor soils because of the similar increases in the V-max and K-m. The effects of combined N and P and P only additions to P-poor soils on the V-max and K-m were similar, but were stronger than the effects of N only or P only additions on the P-rich soils. Phosphatase kinetic parameters were positively related to the availability of N and P in P-rich soils, but inorganic P inhibited phosphatase activity and caused a decrease in the catalytic efficiency in P-poor soils. More microbial community groups could contribute to the secretion of a broader spectrum of iso-enzymes under combined additions of N and P in P-rich soils. We conclude contrast responses of phosphatase kinetics to P and N inputs in P-rich and P-poor forest soils, while long-term N deposition might mitigate P limitation by increasing phosphatase secretion. A is available for this article.
SubtypeJournal
Keywordcatalytic efficiency kinetic parameters nitrogen phosphatase phosphorus subtropical forest temperate forest
Subject AreaEnvironmental Sciences & Ecology
WOS Subject ExtendedEcology
WOS KeywordMICROBIAL COMMUNITY STRUCTURE ; EXTRACELLULAR ENZYME-ACTIVITY ; NORTHEASTERN UNITED-STATES ; CHINESE FIR PLANTATIONS ; CATALYTIC EFFICIENCY ; TERRESTRIAL ECOSYSTEMS ; RESOURCE AVAILABILITY ; SUBTROPICAL CHINA ; ORGANIC-MATTER ; P AVAILABILITY
Indexed BySCI
Language英语
WOS IDWOS:000419494600011
PublisherWILEY
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/43955
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Zhang, XY,Yang, Y,Zhang, C,et al. Contrasting responses of phosphatase kinetic parameters to nitrogen and phosphorus additions in forest soils[J]. FUNCTIONAL ECOLOGY,2018,32(1):106-116.
APA Zhang, XY.,Yang, Y.,Zhang, C.,Niu, SL.,Yang, H.,...&Sun, XM.(2018).Contrasting responses of phosphatase kinetic parameters to nitrogen and phosphorus additions in forest soils.FUNCTIONAL ECOLOGY,32(1),106-116.
MLA Zhang, XY,et al."Contrasting responses of phosphatase kinetic parameters to nitrogen and phosphorus additions in forest soils".FUNCTIONAL ECOLOGY 32.1(2018):106-116.
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