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文中对我省长春、四平、吉林三个地区农田生态系统能量转换效率进行了分析。结果表明,农田投入的总能量以有机能为主,并为无机能投入量的1.74倍。我省单位面积投入能量少,但能量转换效率较高;不同农业区,由于生产条件和自然条件不同,则对农田能量转换效率有不同的影响。我省无机能投入基数低,增加无机能投入量,特别是化肥能投入量,就能够显著地提高单位面积产量;若有机肥与无机肥配合施用,则有助于能量转换效率的提高。分析认为,目前在物质能源有限的情况下,将能量投入的重点放在生产水平较高,而且自然条件又较好的地区,有利于提高能量转换效率。
The paper analyzes the energy conversion efficiency of farmland ecosystem in Changchun, Siping and Jilin of our province. The results showed that the total energy input into farmland was mainly organic, which was 1.74 times of inorganic input. In our province, energy input per unit area is small, but energy conversion efficiency is high. Different agricultural areas have different impacts on farmland energy conversion efficiency due to different production conditions and natural conditions. Inorganic inorganic input in our province is low, increase the amount of inorganic inputs, especially the amount of fertilizer can be significantly increased yield per unit area; if combined with organic and inorganic fertilizers, it will help improve the energy conversion efficiency. According to the analysis, at present, with limited material and energy resources, energy input will be focused on areas with higher production levels and better natural conditions, which will help increase energy conversion efficiency.