为实现人工更新计划,每年需要大量的种子,然而目前针叶树种子的采集和处理问题还没有得到解决。苏联各林管区主要都是从立木上采集松树和云杉的球果,而采伐部门却将伐倒木上的球果随着采伐剩余物一起烧掉。根据列宁格勒州农业局的林业局材料来看,1956年每公斤松树种子的成本为140 Large numbers of seeds are needed each year to achieve manual renewal programs, but the problem of conifer seed collection and processing has not been solved yet. In the Soviet Union, all the forest management zones mainly collect the pine and spruce cones from the standing trees, while the harvesting departments burn the cones on the fallen trees together with the harvesting residues. According to the Forestry Bureau of the Leningrad State Bureau of Agriculture material, in 1956 the cost per kg of pine seeds was 140