1959—1960年全苏林业调查设计局列宁格勒森林经理航空摄影考察团,在依尔库茨克州萨阳地区东部的种子经营区进行了科学考察工作,得出关于红松(西伯利亚红松——译者注)林结实、更新和采伐问题的结论。结实:萨阳地区东部的红松林,大约在40～50龄时就开始结实,一直可以延续到280～300龄时树冠才 1959-1960 All-Surveys Survey and Design Bureau of Forestry Bureau of Leningrad forest managers aerial photography delegation, in the Irkutsk region east of the sands region of the seed business area scientific investigation, come to the pine (Pinus sibirica - Translator’s Note) Lin fruiting, updating and logging conclusions. Strong: Korean pine in the eastern part of Sa Yang, about 40 to 50 years old began to grow strong, has been able to extend to 280 ~ 300 when the crown