黑龙江省的林木良种选育工作从五十年代划定天然母树林开始,到六十年代培育人工母树林,建立无性系种子园,到七、八十年代搞子代测定和地理种源试验,发展比较迅速,取得很好成绩.全省现已建立人工母树林九万七千多亩,其中优良林分四万八千亩,早期改造的樟子松、落叶松人工母树林到一九七九年开始大量结实,丰年可采种七万斤,已建立较大面积的种子园,早年定植的已开始结实.但是,由于人工母树林种源 Seed breeding of Heilongjiang province started from the delineation of natural mother woods in the 1950s to the cultivation of artificial mother woods in the 1960s and the establishment of clonal seed orchard. In the 1970s and 1980s, The development is relatively rapid and has achieved very good results.A total of 97,000 mu of artificial mother trees have been set up in the province, of which 48,000 mu are good stands, and the Pinus sylvestris var. A lot of strong began nine years, seasons can harvest Seventy pounds, has established a larger area of ​​seed orchard, early planting has begun to strong, but because of artificial parent forest provenance