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一、农田能量转换效率农业生产实质上是能源再生产过程。自然界绿色植物生长发育所需的能量,95％来自太阳光,仅5％来自土壤。农业生产所需的能量,除阳光外,还要有辅助能量的投入,以作为动力(劳力、畜力、电、燃油、农业机械)、和补充营养(有机和无机肥料)之用。衡量一个地区农业生产力的指标,主要是能量转换效率,即产出能量和投入能量的比率,这个比率越大,说明该地区农业生产水平越高,以较少的投入能换取较多的产出能,为人类和其它动
First, farmland energy conversion efficiency Agricultural production is essentially the process of energy reproduction. The energy required for the growth and development of the green plants in nature is 95% from the sun and only 5% from the soil. The energy needed for agricultural production, in addition to the sun, is supplemented with auxiliary energy to power (labor, animal power, electricity, fuel, agricultural machinery) and to supplement nutrition (organic and inorganic fertilizers). Indicators of agricultural productivity in a region are mainly energy conversion efficiency, that is, the ratio of output energy to input energy. The greater this ratio indicates that the higher the level of agricultural production in the region, the more output can be exchanged with less investment Can, for humans and others move