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1 前言林木种子几何尺寸的数字特征,主要是由位置特征参数、离散特征参数、分布特征参数等表述的。它是林木种子分选的理论基础,也是评价种子质量的重要指标之一,可为林木种子筛选、电力分选、播种机具设计提供理论依据。 2 种子尺寸测量方法为了使种子的几何尺寸有一定的代表性,从同一批种子中取200～500粒,分别测量每粒种子的三维几何尺寸(依数据大小分别称为长、宽、厚)。通过计算机求出种子几何尺寸数据的位置特征参数、离散特征参
1 Introduction Digital features of tree seed geometric dimensions are mainly described by the location characteristic parameters, discrete characteristic parameters, distribution characteristic parameters and so on. It is the theoretical basis for tree seed sorting and also one of the important indexes for evaluating seed quality. It can provide theoretical basis for tree seed screening, power sorting and sowing machine design. 2 seed size measurement method In order to make the seed geometry has a certain representative, from the same batch of seeds to take 200 to 500, respectively, measuring the three-dimensional geometric size of each seed (according to the size of the data were called length, width, thickness) . Calculate the position characteristic parameters and the discrete characteristic parameters of the seed geometric size data by computer