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dc.contributor.authorXiao, Dan
dc.contributor.authorYe, Yingying
dc.contributor.authorXiao, Shuangshuang
dc.contributor.authorZhang, Wei
dc.contributor.authorHe, Xunyang
dc.contributor.authorLiu, Na
dc.contributor.authorXu, Zhihong
dc.contributor.authorWang, Kelin
dc.date.accessioned2019-10-04T01:23:01Z
dc.date.available2019-10-04T01:23:01Z
dc.date.issued2019
dc.identifier.issn1439-0108
dc.identifier.doi10.1007/s11368-019-02396-2
dc.identifier.urihttp://hdl.handle.net/10072/388046
dc.description.abstractPurpose: Tillage disturbance can significantly affect soil microbial metabolic activity and CO2 fluxes. Nevertheless, the influence of different tillage frequencies on microbial metabolic activity and short-term temporal changes of CO2 fluxes remains unclear. Materials and methods: We established an in situ experiment with the following treatments: no tillage (T0), semiannual tillage (T1), tillage every 4 months (T2), bimonthly tillage (T3), and monthly tillage (T4). The microbial metabolic activity (Biolog EcoPlate), short-term (hours to days) temporal changes in CO2 fluxes within 1 week, and soil properties were measured after 1 year of treatment. Results and discussion: The highest CO2 emissions occurred in the first 72 h after tillage treatment and were significantly higher in T3 and T4 than in T0, T1, and T2 within 1 week. Average well color development (AWCD) values reflect microbial metabolic activity and were significantly higher in the tillage treatments (T1, T2, T3, and T4) than under no tillage. There was no significant difference in the Shannon diversity index under all treatments. A higher Simpson diversity index was observed under high tillage frequency in T2, T3, and T4 compared with T0 and T1, while the highest was observed in T2. The highest utilization of carboxylic acids, amino acids, and polymers occurred in T3 and T4 soils, whereas T2 had the highest utilization of carbohydrates, amines, and miscellaneous carbon sources. AWCD values and short-term CO2 fluxes were significantly correlated with annual changes in soil organic carbon (△SOC), annual changes in dissolved organic carbon (△DOC), microbial biomass carbon (MBC), and large macroaggregates (> 1 mm). Conclusions: These results suggest that frequent tillage disturbance increases microbial metabolic activity, which can stimulate short-term CO2 emissions through changes in soil aggregates, SOC, DOC, and MBC.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherSpringer
dc.relation.ispartofpagefrom3453
dc.relation.ispartofpageto3462
dc.relation.ispartofissue10
dc.relation.ispartofjournalJournal of Soils and Sediments
dc.relation.ispartofvolume19
dc.subject.fieldofresearchEarth sciences
dc.subject.fieldofresearchEnvironmental sciences
dc.subject.fieldofresearchAgricultural, veterinary and food sciences
dc.subject.fieldofresearchcode37
dc.subject.fieldofresearchcode41
dc.subject.fieldofresearchcode30
dc.subject.keywordsScience & Technology
dc.subject.keywordsLife Sciences & Biomedicine
dc.subject.keywordsSoil Science
dc.subject.keywordsEnvironmental Sciences & Ecology
dc.titleTillage frequency affects microbial metabolic activity and short-term changes in CO2 fluxes within 1 week in karst ecosystems
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationXiao, D; Ye, Y; Xiao, S; Zhang, W; He, X; Liu, N; Xu, Z; Wang, K, Tillage frequency affects microbial metabolic activity and short-term changes in CO2 fluxes within 1 week in karst ecosystems, Journal of Soils and Sediments, 2019, 19 (10), pp. 3453-3462
dc.date.updated2019-10-04T01:20:46Z
gro.hasfulltextNo Full Text
gro.griffith.authorXu, Zhihong


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