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http://hdl.handle.net/10773/25074
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DC Field | Value | Language |
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dc.contributor.author | Jeffery, S. | pt_PT |
dc.contributor.author | Verheijen, F. G. A. | pt_PT |
dc.contributor.author | van der Velde, M. | pt_PT |
dc.contributor.author | Bastos, A. C. | pt_PT |
dc.date.accessioned | 2019-01-11T11:39:39Z | - |
dc.date.available | 2019-01-11T11:39:39Z | - |
dc.date.issued | 2011 | - |
dc.identifier.issn | 0167-8809 | pt_PT |
dc.identifier.uri | http://hdl.handle.net/10773/25074 | - |
dc.description.abstract | Increased crop yield is a commonly reported benefit of adding biochar to soils. However, experimental results are variable and dependent on the experimental set-up, soil properties and conditions, while causative mechanisms are yet to be fully elucidated. A statistical meta-analysis was undertaken with the aim of evaluating the relationship between biochar and crop productivity (either yield or above-ground biomass). Results showed an overall small, but statistically significant, benefit of biochar application to soils on crop productivity, with a grand mean increase of 10%. However, the mean results for each analysis performed within the meta-analysis covered a wide range (from −28% to 39%). The greatest (positive) effects with regard to soil analyses were seen in acidic (14%) and neutral pH soils (13%), and in soils with a coarse (10%) or medium texture (13%). This suggests that two of the main mechanisms for yield increase may be a liming effect and an improved water holding capacity of the soil, along with improved crop nutrient availability. The greatest positive result was seen in biochar applications at a rate of 100 t ha−1 (39%). Of the biochar feedstocks considered and in relation to crop productivity, poultry litter showed the strongest (significant) positive effect (28%), in contrast to biosolids, which were the only feedstock showing a statistically significant negative effect (−28%). However, many auxiliary data sets (i.e. information concerning co-variables) are incomplete and the full range of relevant soil types, as well as environmental and management conditions are yet to be investigated. Furthermore, only shortterm studies limited to periods of 1 to 2 years are currently available. This paper highlights the need for a strategic research effort, to allow elucidation of mechanisms, differentiated by environmental and management factors and to include studies over longer time frames. | pt_PT |
dc.description.sponsorship | We would like to acknowledge the work carried out by the researchers whose published data was used for this meta-analysis. Particular thanks go to Wisnubroto et al., for giving us permission to use their pre-published data. Thanks also to the European Soil Data Centre for hosting the MA raw data on their servers to allow for the updating of this MA as new results become available. Finally, this work was partly funded by iSOIL-Interactions between soil related sciences–Linking geophysics, soil science and digital soil mapping, a Collaborative Project (Grant Agreement number 211386) co- funded by the Research DG of the European Commission within the RTD activities of the FP7 Thematic Priority Environment; iSOIL is one member of the SOIL TECHNOLOGY CLUSTER of Research Projects funded by the EC. This publication reflects the authors’ views. The European Commission is not liable for any use that may be made of the information contained therein. | pt_PT |
dc.language.iso | eng | pt_PT |
dc.publisher | Elsevier Masson | pt_PT |
dc.rights | restrictedAccess | pt_PT |
dc.subject | Biochar | pt_PT |
dc.subject | Soil | pt_PT |
dc.subject | Crop productivity | pt_PT |
dc.subject | Meta-analysis | pt_PT |
dc.subject | Effect size | pt_PT |
dc.subject | Crop yield | pt_PT |
dc.title | A quantitative review of the effects of biochar application to soils on crop productivity using meta-analysis | pt_PT |
dc.type | article | pt_PT |
dc.description.version | published | pt_PT |
dc.peerreviewed | yes | pt_PT |
degois.publication.firstPage | 175 | pt_PT |
degois.publication.issue | 1 | pt_PT |
degois.publication.lastPage | 187 | pt_PT |
degois.publication.title | Agriculture, Ecosystems and Environment | pt_PT |
degois.publication.volume | 144 | pt_PT |
dc.identifier.doi | 10.1016/j.agee.2011.08.015 | pt_PT |
Appears in Collections: | CESAM - Artigos DAO - Artigos DBio - Artigos |
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File | Description | Size | Format | |
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Jeffery et al. - 2011 - A quantitative review of the effects of biochar ap.pdf | 555.31 kB | Adobe PDF |
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