【摘要】 本文从生态学能量流的角度研究了简阳县不同时期农田系统能量投入量、投能结构,投能效率及能量投入产出关系。结果表明有机肥能的增产作用最大,有机肥能与化肥能之比应大于3.0,无机动力能投入的增加有助于劳动生产率的提高。更多还原

【Abstract】 The energy inputs and their structure, efficiencies, and the relationship between energy input and output in the farmland ecosystem of Jianyang County were studied in this paper. The results indicated that the effect of organic fertilizer energy on increasing the output energy is the greatest. The ratio of organic and chemical fertilizer energy should be more than 3. The increase of inorganic power energy input is beneficial to the increase of productivity of labor.更多还原