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RASMUSSEN, KJELD
(2)
answer(s).
Srl
Item
1
ID:
111362
Effect of cassava-based bioethanol production on above-ground c: a case study from Southern Mali
/ Rasmussen, Laura Vang; Rasmussen, Kjeld; Birch-Thomsen, Torben; Kristensen, Soren B P
Rasmussen, Laura Vang
Journal Article
0 Rating(s) & 0 Review(s)
Publication
2012.
Summary/Abstract
Increasing energy use and the need to mitigate climate change make production of liquid biofuels a high priority. Farmers respond worldwide to this increasing demand by converting forests and grassland into biofuel crops, but whether biofuels offer carbon savings depends on the carbon emissions that occur when land use is changed to biofuel crops. This paper reports the results of a study on cassava-based bioethanol production undertaken in the Sikasso region in Southern Mali. The paper outlines the estimated impacts on above-ground carbon stocks when land use is changed to increase cassava production. The results show that expansion of cassava production for bioethanol will most likely lead to the conversion of fallow areas to cassava. A land use change from fallow to cassava creates a reduction in the above-ground carbon stocks in the order of 4-13 Mg C ha-1, depending on (a) the age of the fallow, (b) the allometric equation used and (c) whether all trees are removed or the larger, useful trees are preserved. This 'carbon debt' associated with the above-ground biomass loss would take 8-25 years to repay if fossil fuels are replaced with cassava-based bioethanol.
Key Words
Cassava
;
Bioethanol
;
Above - Ground Carbon
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2
ID:
116992
Impacts of Jatropha-based biodiesel production on above and bel: a case study from Mozambique
/ Rasmussen, Laura Vang; Rasmussen, Kjeld; Bruun, Thilde Bech
Rasmussen, Laura Vang
Journal Article
0 Rating(s) & 0 Review(s)
Publication
2012.
Summary/Abstract
The need to mitigate climate change makes production of liquid biofuels a high priority. Substituting fossil fuels by biodiesel produced from Jatropha curcas has gained widespread attention as Jatropha cultivation is claimed to offer green house gas emission reductions. Farmers respond worldwide to this increasing demand by converting forests into Jatropha, but whether Jatropha-based biodiesel offers carbon savings depends on the carbon emissions that occur when land use is changed to Jatropha. This paper provides an impact assessment of a small-scale Jatropha project in Cabo Delgado, Mozambique. The paper outlines the estimated impacts on above and below-ground carbon stocks when land use is changed to increase Jatropha production. The results show that expansion of Jatropha production will most likely lead to the conversion of miombo forest areas to Jatropha, which implies a reduction in above and below-ground carbon stocks. The carbon debts created by the land use change can be repaid by replacing fossil fuels with Jatropha-based biodiesel. A repayment time of almost two centuries is found with optimistic estimates of the carbon debt, while the use of pessimistic values results in a repayment time that approaches the millennium.
Key Words
Biodiesel
;
Jatropha Curcas
;
Above and Below - Ground Carbon
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