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Soil Enzyme Activity Regulates the Response of Soil C Fluxes to N Fertilization in a Temperate Cultivated Grassland

文献类型：期刊论文

作者Yang, Yan1,2; Fang, Huajun1,2,3; Cheng, Shulan2; Xu, Lijun4; Lu, Mingzhu1; Guo, Yifan1; Li, Yuna2; Zhou, Yi2
刊名ATMOSPHERE
出版日期2022-05-01
卷号13期号:5页码:16
关键词nitrogen fertilization forage species soil C fluxes soil enzyme activity temperate cultivated grassland
DOI10.3390/atmos13050777
通讯作者Fang, Huajun(fanghj@igsnrr.ac.cn)
英文摘要Exogenous nitrogen (N) inputs greatly change the emission and uptake of carbon dioxide (CO2) and methane (CH4) from temperate grassland soils, thereby affecting the carbon (C) budget of regional terrestrial ecosystems. Relevant research focused on natural grassland, but the effects of N fertilization on C exchange fluxes from different forage soils and the driving mechanisms were poorly understood. Here, a three-year N addition experiment was conducted on cultivated grassland planted with alfalfa (Medicago sativa) and bromegrass (Bromus inermis) in Inner Mongolia. The fluxes of soil-atmospheric CO2 and CH4; the content of the total dissolved N (TDN); the dissolved organic N (DON); the dissolved organic C (DOC); NH4+-N and NO3--N in soil; enzyme activity; and auxiliary variables (soil temperature and moisture) were simultaneously measured. The results showed that N fertilization (>75 kg N ha(-1) year(-1)) caused more serious soil acidification for alfalfa planting than for brome planting. N fertilization stimulated P-acquiring hydrolase (AP) in soil for growing Bromus inermis but did not affect C- and N-acquiring hydrolases (AG, BG, CBH, BX, LAP, and NAG). The oxidase activities (PHO and PER) of soil for planting Bromus inermis were higher than soil for planting Medicago sativa, regardless of N, whether fertilization was applied or not. Forage species and N fertilization did not affect soil CO2 flux, whereas a high rate of N fertilization (150 kg N ha(-1) year(-1)) significantly inhibited CH4 uptake in soil for planting Medicago sativa. A synergistic effect between CO2 emission and CH4 uptake in soil was found over the short term. Our findings highlight that forage species affect soil enzyme activity in response to N fertilization. Soil enzyme activity may be an important regulatory factor for C exchange from temperate artificial grassland soil in response to N fertilization.
WOS关键词MICROBIAL COMMUNITY COMPOSITION ; GREENHOUSE-GAS EMISSIONS ; CARBON-DIOXIDE FLUXES ; NITROGEN DEPOSITION ; METHANE UPTAKE ; EXTRACELLULAR ENZYMES ; ATMOSPHERIC METHANE ; CH4 UPTAKE ; FOREST ; RESPIRATION
资助项目National Natural Science Foundation of China[41977041] ; National Natural Science Foundation of China[41907036] ; National Natural Science Foundation of China[31770558] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK1003] ; National Key R&D Program of China[2017YFA0604802] ; National Key R&D Program of China[2017YFA0604804] ; National Key R&D Program of China[2016YFC0500603] ; National Key R&D Program of China[2016YFC0503603] ; CAS Strategic Priority Program[XDA200204020] ; CAS Strategic Priority Program[XDA23060401] ; Thousand Talents Plan Project of High-End Innovative Talents of Qinghai Province[TTPPHEITQP-2019]
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种英语
出版者MDPI
WOS记录号WOS:000801484600001
资助机构National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Key R&D Program of China ; CAS Strategic Priority Program ; Thousand Talents Plan Project of High-End Innovative Talents of Qinghai Province
源URL[http://ir.igsnrr.ac.cn/handle/311030/178147]  
专题中国科学院地理科学与资源研究所
通讯作者Fang, Huajun
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Northwest Plateau Inst Biol, Xining 810001, Peoples R China
4.Chinese Acad Agr Sci, Hulunber Grassland Ecosyst Observat & Res Stn, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Yan,Fang, Huajun,Cheng, Shulan,et al. Soil Enzyme Activity Regulates the Response of Soil C Fluxes to N Fertilization in a Temperate Cultivated Grassland[J]. ATMOSPHERE,2022,13(5):16.
APA Yang, Yan.,Fang, Huajun.,Cheng, Shulan.,Xu, Lijun.,Lu, Mingzhu.,...&Zhou, Yi.(2022).Soil Enzyme Activity Regulates the Response of Soil C Fluxes to N Fertilization in a Temperate Cultivated Grassland.ATMOSPHERE,13(5),16.
MLA Yang, Yan,et al."Soil Enzyme Activity Regulates the Response of Soil C Fluxes to N Fertilization in a Temperate Cultivated Grassland".ATMOSPHERE 13.5(2022):16.

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来源：地理科学与资源研究所

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