【摘要】 <正> 一、植物生长与生长方程植物生长的全过程一般都要经历从慢到快、又从快到慢的过程,在总生长量一时间的坐标系中成“∫”形曲线。这就是通称的“∫”形生长。为了探索植物生长的规律和模拟生长过程,曾有不少人提出过关于生长的学说,如有机生长律等等,但往往与实际有较大差距,不合实用。随着电子计算机的发展,人们对从生长理论推导生长方程的兴趣逐渐减退,转而采用数学模型来模拟的办法。这种办法一般能适合实际的需要,所以近年来在森林经营等方面获得了广泛的应用。但是它只适于更多还原

【Abstract】 This article is developed to describe the whole process of "∫" growth of woody plants——Power-exponential equation of growth:S=ce-Bt-A This equation is different from the general model of the simulating growth, it is infered from the theory of growth described below: with rest conditions equal the absolute growth rate (dW/dt) of the weight of the plant body is directly proportional to the weight of the original plant body (Ⅳ), and inversely proportional to the decrepitness (t~α). Hence mathematic expressions of the absolute growth rate, the relative growth rate and the fastest growing time are derived therefrom.It has been proved that this model is of a higher goodness of fit, the index of correlation ordinarily can reach above 0.99, by using that equation to fit pratical data, and compare with some models of growth. It can be used for gorwth projection and construction of yield table. Theoretically, it may be valuable to interpolation of missing data, and searct, ing the way of plants growing mechanism etc.更多还原