一、苗圃评定每一种小试样必须附有登记证,填写来源,采种时间、贮藏方法、净种方法,并经常检验种子生活力。苗床土壤必须含有最适量的有机质,形成最适合的耕作层,以利微生物的繁殖,促进苗木健康生长。对温带的种子,特别是苗床冷、早播种的时候,层积催芽是加快并保证均匀发芽的方法。早播和催芽不但可以减少芽前猝倒的损失,而且比晚播育成的苗木大。根据种子大小分类而育成均匀的苗木是不可取的,因 First, the nursery assessment Each small sample must be accompanied by a registration certificate, fill in the source, seed time, storage methods, net methods, and often test the viability of seeds. Seedbed soil must contain the optimum amount of organic matter to form the most suitable tillage layer to facilitate microbial propagation and promote the healthy growth of nursery stock. Temperate seeds, especially seedbed cold, early sowing time, stratified germination is to speed up and ensure uniform sprouting method. Early sowing and germination not only can reduce the catastrophic cataplasm loss, but also larger than the late sowing seedlings. It is not advisable to grow uniform seedlings according to the size of the seed