土壤总孔隙度(P),通常采用干容重(D)和比重(d)按下列理论公式由计算求得: 以小数表示; 按上式计算无论使用计算尺或计算机,均需减法和除法两个步聚才能完成运算过程,如果原始数据过多计算起来就显得格外麻烦,出了差错再校核一遍更浪费时间。 为了避免上述问题,人们很早就试图找到一简便算法。其中最早的要算是G·B·Bodman和B·A·先后绘制的计算图。 但这两个图要达到生产上实用的精度,必需用较精密的缩放仪放大座标,十分麻烦。 近来,我们对土壤总孔隙度理论公式的函数图象进行了研究,发现利用土壤容重、比重和总孔隙度之间的直角三角形关系图形,能够很方便用于总孔隙度 The total soil porosity (P), usually using the dry bulk density (D) and the proportion (d) is calculated by the following theoretical formula: Calculated as decimals; Calculated by the above equation Whether using a slide rule or a computer, Steps to complete the calculation process, if the original data is too much to calculate is particularly troublesome, out of the error and then check again more waste of time. In order to avoid the above problems, people have long tried to find a simple algorithm. The earliest of these was the calculated graph that G B Bodman and B A. successively plotted. However, these two figures to achieve the production of practical accuracy, you must use a more sophisticated zoom magnification coordinates, is very troublesome. Recently, we have studied the functional image of the theoretical formula of soil total porosity and found that the right-angled triangle relationship between soil bulk density, specific gravity and total porosity can be conveniently used for total porosity