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我省西部的洮南机械林场,杨树林带和用材林总面积为一万多公顷,其中小老树的面积竟达三千多公顷,约占总面积的三分之一。我从1964年开始,截止1978年,陆续地对该场小老树形成原因,进行一些调查与探讨,并提出了相应地改造措施。现将调查情况,分别报告如下。一、自然环境条件 (一)气候条件林场范围的年平均气温为2—5℃;夏季平均高温28—29℃,冬季最低平均气温—22℃
The total area of Taonan mechanical forest farm, poplar forest belt and timber forest in western part of our province is more than 10,000 hectares, of which the area of small old trees has reached more than 3,000 hectares, accounting for about one third of the total area. I started from 1964, as of 1978, one after another on the cause of the formation of small trees, some investigations and discussions, and put forward the corresponding transformation measures. Now the investigation, respectively, are reported as follows. I. Natural Environment Conditions (I) Climatic Conditions The annual average temperature in the range of forest farm is 2-5 ℃; the average high temperature in summer is 28-29 ℃; the lowest average temperature in winter is -22 ℃