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杉木是优良的速生用材树种。十多年来,我场共营造了杉木林17000余亩。分布在平山、低山、山漕里的约9000亩,生长较好,最高的达13米,一般的7米左右,最大胸径25厘米,一般的10厘米左右,是我场经营的重点用材树种之一。随着大片人工杉木林的营造和成林,各种病虫害相继发生和蔓延,尤其是蛀干害虫的危害,引起部分杉木生长衰弱和枯死,严重地威胁着杉木的生长。毛主席教导我们:“自由是
Chinese fir is an excellent species of fast-growing timber. For more than a decade, I made a total of more than 17000 Chinese fir forest. Distribution of about 9,000 acres in Pingshan, low mountains, mountain caverns, better growth, the highest up to 13 meters, the general about 7 meters, the maximum diameter of 25 cm, the general about 10 cm, is my key operating timber tree species one. With the establishment and forestation of large-scale artificial Chinese fir plantations, various pests and diseases have occurred and spread one after another, especially the damage of borer pests, which caused the weak and dead parts of some Chinese fir plants and seriously threatened the growth of Chinese fir. Chairman Mao taught us: "Freedom is