Impacts of Thai bio-ethanol policy target on land use and greenhouse gas emissions
Impacts of Thai bio-ethanol policy target on land use and greenhouse gas emissions
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泰国生物乙醇政策目标对土地利用和温室气体排放的影响
DOI：
10.1016/j.apenergy.2009.05.010
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发表时间：
2009
期刊：
影响因子：
11.2
通讯作者：
M. Sagisaka
中科院分区：
文献类型：
--
作者：
T. Silalertruksa;S. Gheewala;M. Sagisaka
对生物燃料日益增长的需求导致了对原料的需求增加，而这反过来又预计会导致耕作制度或农业用地需求的变化。这项研究使用相应的生命周期评估(LCA)来评估农业生产系统可能(未来)变化的环境后果，并确定当泰国木薯需求增加时，这些变化对土地利用变化(LUC)和温室气体(GHG)的影响。模拟和评估了六种不同的种植制度以增加木薯产量，包括将空地改为农田，提高产量，置换目前正在种植甘蔗的面积，以及越南和澳大利亚种植制度的其他潜在变化。比较结果表明，LUC是影响第一代生物燃料温室气体总排放量的重要因素，尤其是土壤碳储量的变化，约占温室气体净排放量的58-60%。通过扩大种植面积增加木薯产量对温室气体排放的影响明显大于提高生产率。分析表明，提高甘蔗和木薯的生产率是最大限度地利用泰国某些地区的利益的重要途径，这些地区既服务于食品行业，也服务于燃料行业。
The growing demand for biofuels has led to an increased demand for feedstocks which in turn is anticipated to induce changes in the cropping systems or land requirement for agriculture use. This study used consequential life cycle assessment (LCA) to evaluate the environmental consequences of possible (future) changes in agricultural production systems and determine their effects on land use change (LUC) and greenhouse gas (GHG) implications when cassava demand in Thailand increases. Six different cropping systems to increase cassava production including converting unoccupied land to cropland, yield improvement, displacement of area currently under sugarcane cultivation and the other potential changes in cropping systems in Viet Nam and Australia are modeled and assessed. The comparative results show that LUC is an important factor in overall GHG emissions of the first generation biofuels especially change in soil carbon stock contributing about 58–60% of the net GHG emissions. Increased cassava production by expanding cultivation area has a significantly larger effect on GHG emissions than increased productivity. The analysis shows that increasing productivity of both sugarcane and cassava are important ways to maximize benefits in using of certain area of Thailand to serve both the food and fuel industries.