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集成能量投入-产出分析和灰色关联分析方法,分析1961-2005年我国农业生态系统的能量投入-产出及能效率的变化,找出影响其变化的主导因素.结果表明:能量投入以畜力、有机肥和化肥为主,农业机械能和农业劳动力能比重小;随着能量投入的增加,单位耕地面积上的能量产出在波动中增长,1970年以来高于世界平均水平,但能效率在波动中下降.能效率与农业劳动力能和畜力能等传统动力能的关联性强,有机肥能投入减少对能效率的下降影响较大,化肥能的大量投入对总能量产出的贡献有限.因地制宜地增加机械能、提高有机肥能比重,有助于提高能效率.
Integrated energy input-output analysis and gray relational analysis method to analyze the energy input-output and energy efficiency changes of China’s agroecosystem from 1961 to 2005, and find out the dominant factors that affect the change.The results show that: , Organic fertilizers and fertilizers, agricultural machinery energy and agricultural labor force can be a small proportion; with the increase of energy input, energy output per unit area of cultivated land in the fluctuations of growth since 1970, higher than the world average, but the energy efficiency of The energy efficiency is related to the traditional kinetic energy such as agricultural labor force and animal power and so on. The reduction of organic fertilizer can greatly affect the decline of energy efficiency, and the large contribution of chemical fertilizer can only make a limited contribution to the total energy output. According to local conditions to increase mechanical energy, increase the proportion of organic fertilizer can help improve energy efficiency.