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1978年6月在保加利亚索菲亚召开了欧洲山地造林学术报告会,会期5天,20个国家约60位林业专家参加了会议.代表们考察和参观了保加利亚山地水平阶造林情况及其所使用的机械.挪威、希腊、罗马尼亚、法国、苏联等介绍了本国山地造林经验.挪威用2+2年生裸根苗与2+0年生容器苗,在不整地的土地上,进行了造林效率对比.结果是每个工时栽苗量从110株增加到了180株,还减轻了劳动强度,而成活率是一样的.根据瑞典和挪威的经验,在困难地区造林,对工人进行手工操作先进方法的技术指导和训练,在现阶段来说,要比发展新的植树机更有意义.
In June 1978, a seminar on the afforestation of the European forests was held in Sofia, Bulgaria, for a duration of 5 days and some 60 forestry experts from 20 countries attended the conference. The delegates inspected and visited the afforestation at the level of Bulgarian mountains and the machinery they used Norway, Greece, Romania, France, the Soviet Union and other countries introduced its own afforestation experience in Norway with 2 +2 annual bare root seedlings and 2 +0 annual container seedlings in the land on the wrong site, compared with the efficiency of afforestation. The result is that each The number of seedlings planted per plant increased from 110 to 180 and the labor intensity was reduced with the same survival rate. Based on the experience of Sweden and Norway, technical guidance and training on afforestation in difficult areas and on advanced methods of manual operation of workers , At this stage, is more meaningful than the development of new tree-planting machines.