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dc.contributor.authorDing, Fan
dc.contributor.authorVan Zwieten, Lukas
dc.contributor.authorZhang, Weidong
dc.contributor.authorWeng, Zhe Han
dc.contributor.authorShi, Shengwei
dc.contributor.authorWang, Jingkuan
dc.contributor.authorMeng, Jun
dc.date.accessioned2019-06-09T01:37:34Z
dc.date.available2019-06-09T01:37:34Z
dc.date.issued2018
dc.identifier.issn1439-0108
dc.identifier.doi10.1007/s11368-017-1899-6
dc.identifier.urihttp://hdl.handle.net/10072/384747
dc.description.abstractPurpose: Previous studies have found biochar-induced effects on native soil organic carbon (NSOC) decomposition, with a range of positive, negative and no priming reported. However, many uncertainties still exist regarding which parameters drive the amplitude and the direction of the biochar priming. Materials and methods: We conducted a quantitative analysis of 1170 groups of data from 27 incubation studies using boosted regression trees (BRTs). BRT is a machine learning method combining regression trees and a boosting algorithm, which can effectively partition independent influences of various factors on the target variable in the complex ecological processes. Results and discussion: The BRT model explained a total of 72.4% of the variation in soil carbon (C) priming following biochar amendment, in which incubation conditions (36.5%) and biochar properties (33.7%) explained a larger proportion than soil properties (29.8%). The predictors that substantially accounted for the explained variation included incubation time (27.1%) and soil moisture (5.0%), biochar C/N ratio (6.2%), nitrogen content (5.5%), pyrolysis time during biochar production (5.1%), biochar pH (4.5%), soil C content (5.2%), sand (4.7%) and clay content (4.1%). In contrast, other incubation conditions (temperature, biochar dose, whether nutrient was added), biochar properties (biochar C, feedstock type, ash content, pyrolysis temperature, whether biochar was activated) and soil properties (nitrogen content, silt content, C/N ratio, pH, land use type) had small contribution (each < 4%). Positive priming occurred within the first 2 years of incubations, with a change to negative priming afterwards. The priming was negative for low N biochar or in high-moisture soils but positive on their reverse sides. The size of negative priming increased with rising biochar C/N ratio, pyrolysis time and soil clay content, but deceased with soil C/N ratio. Conclusions: We determine the critical drivers for biochar effect on native soil organic C cycling, which can help us to better predict soil C sequestration following biochar amendment.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherSPRINGER HEIDELBERG
dc.relation.ispartofpagefrom1507
dc.relation.ispartofpageto1517
dc.relation.ispartofissue4
dc.relation.ispartofjournalJOURNAL OF SOILS AND SEDIMENTS
dc.relation.ispartofvolume18
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.titleA meta-analysis and critical evaluation of influencing factors on soil carbon priming following biochar amendment
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2018 Springer-Verlag. This is an electronic version of an article published in Journal of Soils and Sediments (JSS), April 2018, Volume 18, Issue 4, pp 1507–1517. Journal of Soils and Sediments (JSS) is available online at: http://link.springer.com// with the open URL of your article.
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gro.griffith.authorVan Zwieten, Lukas


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