Mitigating Land Use Changes From Biofuel Expansion: An Assessment of Biofuel Feedstock Yield Potential in APEC Economies

摘要: The emerging biofuel sector has drawn great interest as an alternative source of fuel for transportation. The expansion of biofuels greatly impacts world agricultural markets, since currently, the primary feedstocks for ethanol and biodiesel production are field crops and their derived products. There is great interest in the potential of countries to expand their biofuel sectors through increased production of feedstocks. The long-term potential for developing first-generation biofuels in many countries depends on a large and constant supply of feedstocks. This may be achieved in two ways: land extensification and/or land intensification. However, expansion of land area comes with a number of environmental challenges highlighted by the recent debate on indirect land use change brought about by biofuel expansion (Searchinger et al., 2008; Fargione et al., 2008). Therefore, land intensification through yield growth, and production of second-generation biofuel feedstocks, such as crop residues and perennial grass on marginal land, are generally seen as critical factors for sustainable development of biofuels as well as mitigation of land use changes. In this context, it is essential to gain a better understanding of the yield trends and the future yield potential of biofuel feedstocks to help determine the impact of biofuel expansion on agricultural markets. Therefore, the aim of this analysis is to review and analyze historical and projected trends of crop yields, particularly for crops used in biofuel production. One of our major interests is the impact of crop prices on yields in the long run, given that the increased production of biofuels from crops has created a …