| Journal Article |
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| Article Title | Intercropping teak (Tectona grandis) and maize (Zea mays): bioeconomic trade-off analysis of agroforestry management practices in Gunungkidul, West Java | | Author | Ni'matul Khasanah, Aulia Perdana, Arif Rahmanulloh, Gerhard Manurung, James M Roshetko and Meine van Noordwijk | | Year | 2015 | | Journal Title | Agroforestry Systems | | Institution | Springer Science+Business Media Dordrecht | | Pages | 1-17 | | Call Number | JA0629-15 | | Keywords | Agroforestry, Ex-ante analysis, Management practices, Smallholder teak, Trade-off analysis |
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| Abstract: |
| Producing high quality timber meetingexport standards requires intensive tree management.Using a tree-crop interactions model (WaNuLCAS) weanalyzed tree management practices in intercroppedteak (Tectona grandis) and maize (Zea mays) comparedto teak and maize monocultures. Tradeoff analysis inintercropped teak and maize was designed in a threetreatmentfactorial: initial teak density (1600 trees ha-1(2.5 m 9 2.5 m), 1111 trees ha-1 (3 m 9 3 m) and 625 trees ha-1 (4 m 9 4 m)), thinning intensity (light(25 %), moderate (50 %) and heavy (75 %) of treedensity), and pruning intensity (40 % and 60 % ofcrown biomass). Cumulative maize yield in the first5 years of teak growth increased 10–38 % when treedensity was reduced. All simulated intercropping practicesproduced a higher wood volume than a monoculture,as trees benefit from crop fertilization. Maximumwood volume (m3 ha-1) was obtained at initial treedensity of 625 trees ha-1, 25 %ofwhichwas thinned inyear 5 and another 25 % in year 15 with 40 % of thecrown pruned in years 4, 10 and 15. However, greaterstemdiameter as can be obtained with further thinning isrewarded with higher market price per volume of wood.Profitability analysis taking into account the cost oflabour (for maize production, thinning and pruning) andits effect on additional timber revenue showed that thehighest net present value and return to labour wasprovided by the system with 50 % thinning in year 5.Economic optimization was not sensitive to variationsaround the default price assumptions. |
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