林木种苗是林业生产的物质基础，是林业生产最基本的生产资料，种苗的优劣直接影响到林业生产效益，积极推广林木良种是提高林业生产水平的一项重要措施。建国以来，我市在林木良种工作中，一直在作积极有益的探索，五、六十年代，我市选用侧柏、刺槐作为荒山绿化的先锋树种，? Tree seedlings are the material basis of forestry production and the most basic means of production for forestry production. The merits of seedlings directly affect the benefits of forestry production. Active promotion of forest seed improvement is an important measure to improve forestry production. Since the founding of the People’s Republic of China, the city has been making active and beneficial explorations in the forest tree improvement work. In the 1950s and 1960s, the city chose Platycladus orientalis and Robinia pseudoacacia as the pioneer tree species for the afforestation of barren hills.