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dc.contributor.author
Wartenberg, Ariani C.
dc.contributor.author
Blaser, Wilma J.
dc.contributor.author
Roshetko, James M.
dc.contributor.author
Van Noordwijk, Meine
dc.contributor.author
Six, Johan
dc.date.accessioned
2020-09-24T07:35:53Z
dc.date.available
2020-09-24T06:10:03Z
dc.date.available
2020-09-24T07:35:53Z
dc.date.issued
2020-08
dc.identifier.issn
0032-079X
dc.identifier.issn
1573-5036
dc.identifier.other
10.1007/s11104-018-03921-x
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/442176
dc.description.abstract
Background and aims Trade-offs between ecological benefits and potential yield and growth reductions associated with the inclusion of shade trees in cocoa agroforests remain poorly understood. In this study we investigate interactions between shade and cocoa trees in cocoa agroforests in terms of soil fertility and cocoa productivity. Methods We quantified the effects of individual shade trees from 11 commonly intercropped species on cocoa growth (aboveground biomass) and yield and soil fertility indicators (total soil carbon, nitrogen, phosphorus contents and soil aggregation) at field sites in Southeast Sulawesi, Indonesia. Results Shade trees had a net positive effect on soil fertility in cocoa agroforests, with a 6% increase in soil carbon, a 4% in soil nitrogen and a 24% increase in mean weight diameter (used as an indicator for median soil aggregate size), under shade tree canopies compared to open areas. We found that shade trees had a net negative effect on cocoa tree growth and no net effect on cocoa yields. We were not able to link costs versus benefits with specific shade tree traits, but nevertheless observed significant differences between shade tree species. G. sepium (gliricidia) had significantly positive effects on yields, soil carbon and aggregation. N. lappaceum (rambutan) and D. zibethinus (durian) had significantly positive effects on soil carbon and nitrogen contents and on aggregation, but not on yields. Conclusions Our findings confirm the potential for soil improvements under shade trees and suggest that the inclusion of individual shade trees does not always constitute a direct trade-off for farmers in terms of yield losses. © 2019 Springer Nature Switzerland AG.
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.subject
Agroforestry
en_US
dc.subject
Soil fertility
en_US
dc.subject
Yields
en_US
dc.subject
Theobroma cacao
en_US
dc.subject
Shade trees
en_US
dc.title
Soil fertility and Theobroma cacao growth and productivity under commonly intercropped shade-tree species in Sulawesi, Indonesia
en_US
dc.type
Journal Article
dc.date.published
2019-01-16
ethz.journal.title
Plant and Soil
ethz.journal.volume
453
en_US
ethz.journal.issue
1-2
en_US
ethz.journal.abbreviated
Plant Soil
ethz.pages.start
87
en_US
ethz.pages.end
104
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Berlin
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2020-09-24T06:10:08Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2020-09-24T07:36:10Z
ethz.rosetta.lastUpdated
2021-02-15T17:29:28Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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