Supply response, marginal cost, and soil erosion implications of stover-based biofuels.
Supply response, marginal cost, and soil erosion implications of stover-based biofuels.
复制标题
基于秸秆的生物燃料的供应响应、边际成本和土壤侵蚀影响。
DOI：
10.1093/aepp/ppu042
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
W. Tyner
中科院分区：
文献类型：
--
作者：
Juan P. Sesmero;M. Pratt;W. Tyner
现有对玉米秸秆作为能源原料的经济分析没有考虑到与不同秸秆价格相关的土地利用的潜在变化。我们估计了玉米秸秆供应密度对土地利用变化驱动的玉米秸秆价格的反应，并研究了其对加工厂定价策略和边际成本的影响，以及与土壤侵蚀相关的变化。我们发现，植物将利用密集的利润率以及广泛的利润率来获得额外的秸秆数量。我们的结果显示，与直觉相反的是，秸秆市场可能会导致较低的土壤侵蚀，这是因为将土地重新分配给连续的去除玉米，与免耕耕作相结合，导致土壤侵蚀比没有去除秸秆的基线低。同样与预期相反的是，由于与最优定价相关的燃料棚内土地利用的变化，使用具有秸秆去除功能的覆盖作物可能会导致更高的土壤侵蚀。
Existing economic analysis of corn stover as an energy feedstock has not considered potential changes in land use associated with different stover prices. We estimate the response of corn stover supply density to its price driven by changes in land use and examine its implications for a processing plant's pricing strategy and marginal cost, as well as associated changes in soil erosion. We find that plants will exploit the intensive margin as well as the extensive margin to secure additional amounts of stover. Our results show, counterintuitively, that a market for stover may result in lower soil erosion due to reallocations of land to continuous corn with removal, which, combined with no-till farming, results in lower soil erosion than the baseline without stover removal. Also contrary to expectations, using cover crops with stover removal may result in higher soil erosion due to land use changes within the fuel shed associated with optimal pricing.