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近些年来,公园中一些生长健壮的古油松树突然倒毙的事故时有发生,给国家造成无法挽回的损失。因此,研究防止这种事故的发生,不仅保护了古树,也避免了房屋被砸毁,人身受伤亡。油松树多分布于华北地区,适应在排水良好,砂质高燥的土壤中生长。在不同的环境条件下生长也有差异,一般有200～300年树龄的油松树,干径粗可达60～100厘米。油松主根发达,须根不发达,外生菌根。当土壤通气条件好时,生长很快,年生长量可达40～60厘
In recent years, the sudden fall of some well-grown ancient pine trees in the park has occurred, causing irreparable damage to the country. Therefore, the study to prevent the occurrence of such accidents not only protects the old trees, but also prevents the houses from being smashed and personal injuries. Pinus tabulaeformis distributed in North China, adapted to the well-drained, high sandy soil growth. Growth in different environmental conditions are also different, usually 200 to 300 years old tree-oil-tree, stem diameter up to 60 to 100 cm. The main roots of pine oil developed, fibrous roots underdeveloped, ectomycorrhizal. When the soil aeration conditions are good, grow rapidly, the annual growth of up to 40 to 60%