我国广大林业工人、人民公社社员和林业科学技术人员,积极开展林木优良品种的科学实验和群众性的选种、育种、引种工作。近几年来,各地已选育出一批生长快、材质好、适应性广、抗病虫害性能强的优良树种,初步建立了一些母树林、种子园等良种 The vast majority of forestry workers, people’s communes members and forestry science and technology personnel in our country actively carry out scientific experiments on fine varieties of forests and mass selection, breeding and introduction. In recent years, we have bred a group of elite tree species that grow fast, have good materials, wide adaptability and strong pest resistance, and have initially established some elite trees such as mother tree groves and seed orchards.