Energy Efficiency of Intensive Rice Production in Japan: An Application of Data Envelopment Analysis
Energy Efficiency of Intensive Rice Production in Japan: An Application of Data Envelopment Analysis
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DOI：
10.3390/su10010120
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发表时间：
2018-01-01
期刊：
影响因子：
3.9
通讯作者：
Masuda, Kiyotaka
中科院分区：
文献类型：
--
作者：
Masuda, Kiyotaka
集约化水稻生产为养活不断增长的世界人口做出了贡献，但也增加了化石能源的消耗。本文考察了扩大水稻种植规模对日本集约化水稻生产能源效率的影响。采用数据包络分析（DEA）方法计算能源效率分数并确定操作目标。采用窗口分析技术对2005-2011年的统计数据进行分析，其中水稻种植规模为9个，从15公顷不等。选择六种能源投入（化石燃料、电力、化肥、农药、农业服务和农业机械）和基于权重的水稻产量分别作为DEA投入和DEA产出。结果表明，1公顷到15公顷农场的能源效率得分范围为0.732。总的来说，增加日本水稻种植的规模可以提高能源效率，因为农业机械和农业服务单位面积消耗的能源大大减少。这些发现表明，在日本等发达国家，增加农业规模是提高高度机械化水稻生产能源效率的有效途径。
Intensive rice production has contributed to feeding the world's growing world population, but it has also increased fossil energy consumption. This paper examines the effect of increasing the scale of rice farming on the energy efficiency of intensive rice production in Japan. A data envelopment analysis (DEA) approach is used to calculate energy efficiency scores and identify operational targets. A window analysis technique is applied to the 2005-2011 statistical data, with nine scales of rice farming, ranging from = 15 ha. Six energy inputs (fossil fuels, electricity, chemical fertilizers, pesticides, agricultural services, and agricultural machinery) and the weight-based rice yield are selected as the DEA inputs and the DEA output, respectively. The results show that the energy efficiency scores range from 0.732 for farms of 1 ha to = 15 ha. Overall, increasing the scale of rice farming in Japan improves energy efficiency because of a great reduction in the energy consumed per unit area by agricultural machinery and agricultural services. These findings suggest that increasing the scale of farming is an effective way to enhance the energy efficiency of highly mechanized rice production in developed countries, such as Japan.