【摘要】 农田生态系统是人工建立的生态系统,落实必要的农业技术措施,对于提高农田生态系统的投能效率是必要的。1961～2005年我国农田生态系统的生产力水平虽然在提高,能效率却在波动中下降。能效率与影响因子之间的关联度分析表明,对能效率的贡献,按照劳动力能投入量、蓄力能投入量、有机肥能投入量、化肥能投入量和农业拖拉机能投入量的顺序,依次排列。因此,要采取正确的农业技术措施管理农田,因地制宜地推广小农机,提高农田生态系统的投能效率,除了提高单位耕地面积上有机肥能投入比重外,应该合理施肥,培养地力,以提高耕地产出的能效率。更多还原

【Abstract】 The Agro-ecosystems,as the artificial ecosystems,were affected by human activities.The productivity of cultivated land has been improved,but the energy efficiency in land management was seen falling in the process of wave.In accordance with correlation analysis between the major impact factors of energy input and the energy efficiency of arable land,the result showed that the contribution to the energy efficiency was followed with the labor force,animal power,the organic fertilizer,chemical fertilizer and agricultural tractors in turn.The largest contribution was the agricultural workforce and animal power.The input proportion to total energy was reduced faster and the growth of agricultural tractor was limited,a rapid increase in fertilizer input could become the key factor in the energy efficiency decline because of the power reduced without padding input.In the future it will play a very important role in improving the quality of cultivated land management to constantly adjust the total energy inputs of agricultural structure and need to use the more agricultural tractor and promote small farm machinery according to local conditions.The organic fertilizer can contribute to the energy efficiency less than the power,but may have an important impact on energy efficiency due to the larger share in the total energy input and accounted for the more rapidly reduce.Therefore,it may be help improve the energy efficiency of output of arable land due to enhancing productivity per unit area and per unit time,the arable land management technologies must also address pressing the organic fertilizer issues,increasing nutrient use efficiency through integrated nutrient management and strengthening nutrient recycling mechanisms.The measures of improving the soil fertility should be reasonable fertilization to improve yield.更多还原