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杉木是我场经营的速生树种之一,建场二十年来,先后营造杉木林八千九百三十四亩。栽植在土壤深厚肥沃,透气性强、排水良好的地方的杉木,生长绿郁郁葱葱。但在局部地方,由于土层较浅,瘠薄干燥,粘重坚实,渗水透气性差,杉木黄化,甚至形成小老树、枯死木。这类杉林有二千一百余亩,约占23.5％。我们对杉木黄化病的防治,已进行四年的调查研究,现谈谈黄化原因及我们的防治
Cedar is one of the fast-growing tree species that I run in the field. During the past 20 years since its foundation, Cunninghamia lanceolata has built 8,934-mu land. Cultivated in the soil is rich and fertile, breathable, well-drained place of the fir, growing green lush. However, in some places, due to the shallow soil, infertile dry, solid sticky, seepage permeability is poor, fir yellow, and even the formation of small trees, dead wood. There are over 21,000 acres of this kind of cedar, accounting for about 23.5%. We have the control of Chinese fir disease, has conducted a four-year investigation, now talk about the causes of yellowing and our control