种子园是用有性或无性繁殖人工精选的树木个体、或用综合育种法塑造的新品种的植株而建立起来的良种繁育场所,是林业生产中一项重要的基本建设。毛主席早就指出:“有了优良品种,即不增加劳动力、肥料,也可获得较多的收成。”实践证明,在同样土壤条件营林措施下,采用良种造林,成活率高,林木生长快,材质好,成材时间短,木材产量可提高30-50%,抗病虫害性能强的良种,病虫害可以减少40 Seed orchard is an important breeding ground for the establishment of forestry, with or without artificial reproduction of artificially selected trees, or with new varieties of plants which are created by comprehensive breeding. Chairman Mao pointed out long ago: “With excellent varieties, that is, without more labor and fertilizers, more crops can be obtained.” Practice has proved that under the same soil condition, afforestation is adopted with improved seed and survival rate, Trees grow fast, the material is good, a short time, lumber production can be increased by 30-50%, pest resistance strong varieties, pests and diseases can be reduced by 40