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通过物质、能量与价值的流量分析,对生态系统进行结构、功能与效益的分析和评价,是生态系统分析的重要方法,也是当前农业气象学研究的重要内容之一。但是对这些流量效率(即流出系统量与流入系统量之比)的评价与判断,通常是用实际效率与预定效率(计划指标)对比,用当年效率与往年效率对比,或用本单位效率与其他同类单位效率对比来进行。这些方法由于缺乏统一的对比标准,往往难以反映不同生态系统流量效率的高低。本文根据农业生态学原理,利用当量分析的方法,提出流量当量指数的概念,并通过物流、能流当量指数的计算,以单项目生产流量效率试验结果作为参照,对江浦县生态养殖试验示范场的部分流量效率进行分析,从而得出该复合生态系统的效益状况,使之具有更明确的效益意义。
The analysis of the structure, function and benefits of ecosystems through the flow analysis of material, energy and value is an important method of ecosystem analysis and one of the important contents of current agricultural meteorology research. However, the evaluation and judgment of these flow efficiency (that is, the ratio of outflow system to inflow system volume) are usually compared with the actual efficiency and the planned efficiency (planned indicators), comparing the current efficiency with the previous efficiency, or using the unit efficiency Other similar units to compare the efficiency. Due to the lack of a uniform standard of comparison, these methods often fail to reflect the efficiency of different ecosystem flows. According to the principles of agroecology, the concept of flux equivalent index is put forward by the method of equivalent analysis. Through the calculation of logistics and energy flow equivalent index, taking the single item production flow efficiency test as a reference, Part of the traffic efficiency analysis, and thus come to the benefit of the composite ecosystem status, so that it has a more clear significance of the benefits.