种子是培育苗木的前提,如何用好种子是当前生产上较为普遍存在的一个问题。据调查,有的地区采取加大播种量的办法来获得苗木高产,由于没有处理好苗木个体生长发育和群体之间的发展关系,使苗木质量下降。苗木丰产的特点应该是:既要保证苗木个体质量,又要取得较高的数量。播种量过大,一则浪费种子,加大育苗成本,二则苗木相互拥挤,营养面积小,通风不良,光照不足,光合作用降低,致使苗木细弱,单位面积产苗量 Seeds are the prerequisite for cultivating seedlings. How to make good use of seeds is a problem that is more prevalent in current production. According to the survey, in some areas, the method of increasing sowing amount is adopted to obtain the high yield of seedlings. The quality of seedlings is not reduced because of the failure to deal with the individual growth and development of seedlings and the development relationship among the groups. Seedling high yield characteristics should be: it is necessary to ensure the quality of individual seedlings, but also to obtain a higher quantity. Sowing too much, a waste of seeds, increase nursery costs, two crowded nursery stock, small area of ​​nutrition, poor ventilation, lack of light, reduce photosynthesis, resulting in thin seedlings per unit area of ​​seedling output