基于能值分析的福建省农用地可持续利用态势研究

为了对近十年来福建省农地的可持续利用情况进行综合分析，运用能值理论构建了福建省农用地可持续利用评价指数，将农用地系统中储存和流动的不同种类的能量转化为同一标准——能值，计算福建省近十年农用地总能值投入产出比、工业能值投入产出比、农用地环境负载指数，土地可持续利用指数5个农用地可持续利用态势的指标数值，并利用上述5个指数对福建省近十年来农用地的可持续性进行判定。结果表明：福建省农用地总能值投入产出比变化明显并呈下降态势，与其他地区相比，福建省的农用地的能值利用率相对较高。工业能值投入产出比数值逐年减小，呈下降趋势，农用地对工业能值投入量的依赖程度越来越高。环境负载指数呈波动性上升特点，农用地环境压力越来越大。综合表明农用地开发程度越来越大，系统可持续性和稳定性有所下降。

The Sustainable Utilization Situation Research of Agricultural Land in Fujian Based on the Emergy Analysis

In order to analyze the sustainable utilization of the cropland in Fujian in the recent ten years, this study used the ability of value analysis of regional agriculture ecosystem sustainable development evaluation index as the theoretical basis, and put the agricultural land system storage and flow of different kinds of energy into the same standard could value to calculate Fujian agricultural land value input-output ratio, industrial emergy input and output ratio of agricultural land, environmental load index, sustainable land use index five agricultural land sustainable utilization situation index value, and by using the above five index of Fujian Province this ten years the sustainability of agricultural land for decision. The results showed that Fujian agricultural land could always value input-output ratio changes obviously and a trend of declining, compared with other regions, value utilization of the farmland in Fujian was relative taller. Industrial emergy input and output was more than numerical year after decreasing, and the decline of agricultural land for industrial emergy input the reliance was more and more high. Environmental load index was rising volatility, the pressure on the environment of agricultural ground was more and more heavy. The result comprehensive showed that, agricultural land development degree was more and more big, the sustainability and stability of cropland system would be descended.