关于林木种子质量分级问题的讨论

Discussion on the Classification of Forest Tree Seed Quality

提出了《林木种子质量分级》及现行分级方法存在的问题 :目前的质量分级标准 (GB790 8- 1 999)在某种程度上不能反映种子的真实质量。指出林木种子质量分级不能仅根据检验结果值的大小参照标准直接确定 。

This paper shows the problems on classification of seed quality based on 《Classification of forest tree seed quality》(GB 7908-1999). For example, to Pinus yunnanensis ,seed quality with 76% germination is considered as the first grade and seed quality with 74% germination is for the second grade. In fact, there are no marked differences between 76% and 74%. It also shows the method to solve that problem by statistical hypothesis test. At the same time, it points out that seed quality classification is not able to indicate real seed quality well according to GB 7908-1999.