论文部分内容阅读
计量和评价一个生态经济系统的结构和功能同环境协调一致的程度,是进一步提高其整体效益的需要。但是,以往的分析方法多采用直观分析法,对其成果很难进行比较,而且直观分析法不能估计出误差的大小和精度。也难以确定适宜林带规格的尺度。因此,有必要探讨一种确切评价防护林带防护效益的指标和方法,作为衡量农田防护林效能的尺度,以促进科研成果的交流和推广。为此,我们运用方差分析法,于1987年夏对福建海坛岛六区木麻黄林带果树的增长效益进行了测试,现叙述于下。
Measuring and assessing the extent to which the structure and function of an eco-economic system are in harmony with the environment is a need to further improve their overall effectiveness. However, the past analysis methods mostly adopt the intuitionistic analysis method, it is hard to compare the results, and the intuitionistic analysis method can not estimate the error size and accuracy. It is also difficult to determine the appropriate scale specifications. Therefore, it is necessary to explore an indicator and method to accurately evaluate the protective effectiveness of shelterbelts as a measure of the effectiveness of farmland shelterbelts to promote the exchange and promotion of scientific research achievements. To this end, we use the method of analysis of variance, in the summer of 1987 on the growth of the benefits of Casuarina equisetifolia fruit trees in the six regions of Fujian Haitan Island are tested, are described below.