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Specific Responses of Soil Microbial Residue Carbon to Long-Term Mineral Fertilizer Applications to Reddish Paddy Soils
Zhang Xinyu1,2; Xie Juan1; Yang Fengting1; Dong Wenyi3; Dai Xiaoqin1; Yang Yang1,2; Sun Xiaomin1,2
2018-06-01
Source PublicationPEDOSPHERE
ISSN1002-0160
Volume28Issue:3Pages:488-496
Corresponding AuthorZhang Xinyu(zhangxy@igsnrr.ac.cn) ; Sun Xiaomin(sunxm@igsnrr.ac.cn)
AbstractMineral nutrient inputs to soil may alter microbial activity and consequently influence the accumulation of microbial residues. In this study, we investigated the effects of application rates and ratios of mineral fertilizers on the microbial residue carbon (MRC) of reddish paddy soils after long-term (15-year) fertilizer applications in southern China. Contents of three soil amino sugars as microbial residue contents were determined and MRC were calculated based on amino sugars. Results showed that three individual amino sugar contents increased as fertilizer application rates increased until maximum values were reached at a rate of 450-59-187 kg ha(-1) year (N-P-K). The three amino sugar contents then declined significantly under the highest mineral fertilizer application rate of 675-88-280 kg ha(-1) year(-1) (N-P-K). In addition, to enhance the microbial residue contents, it was more beneficial to double P (N: P: K = 1: 0.26:0.41) in fertilizers applied to the P-deficient reddish paddy soils than to double either N (N: P: K = 2: 0.13:0.41) or K (N: P: K = 1: 0.13:0.82). The contents of the three individual amino sugars and microbial residues under different fertilizer application rates and ratios were significantly and positively correlated with soil organic carbon (SOC), total N, total P, and pH. Increases in values of the fungal C to bacterial C ratios showed that soil organic matter (SOM) stability increased because of the fertilizer applications over the past 15 years. The contents and ratios of amino sugars can be used as indicators to evaluate the impact of mineral fertilizer applications on SOM dynamics in subtropical paddy soils. The results indicated that fertilizer applications at a rate of 450-59-187 kg ha(-1) year(-1) (N-P-K) may improve crop yields, SOC contents, and SOC stability in subtropical paddy soils.
Keywordamino sugar application rate application ratio bacterial C fungal C soil nutrient soil organic C
DOI10.1016/S1002-0160(17)60335-7
WOS KeywordLIMITING BACTERIAL-GROWTH ; AMINO SUGAR ; INORGANIC FERTILIZERS ; SOUTHERN CHINA ; ORGANIC-MATTER ; RED SOIL ; COMMUNITY ; BIOMASS ; FUNGAL ; AGROECOSYSTEMS
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[31130009] ; National Natural Science Foundation of China[41171153] ; National Natural Science Foundation of China[41571251]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000440647000010
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54478
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhang Xinyu; Sun Xiaomin
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
3.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
Recommended Citation
GB/T 7714
Zhang Xinyu,Xie Juan,Yang Fengting,et al. Specific Responses of Soil Microbial Residue Carbon to Long-Term Mineral Fertilizer Applications to Reddish Paddy Soils[J]. PEDOSPHERE,2018,28(3):488-496.
APA Zhang Xinyu.,Xie Juan.,Yang Fengting.,Dong Wenyi.,Dai Xiaoqin.,...&Sun Xiaomin.(2018).Specific Responses of Soil Microbial Residue Carbon to Long-Term Mineral Fertilizer Applications to Reddish Paddy Soils.PEDOSPHERE,28(3),488-496.
MLA Zhang Xinyu,et al."Specific Responses of Soil Microbial Residue Carbon to Long-Term Mineral Fertilizer Applications to Reddish Paddy Soils".PEDOSPHERE 28.3(2018):488-496.
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