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森林和生态环境是一个相互联系、相互作用、相互制约的统一体。与森林分布、生长发育最为密切的因子水分和温度,又受纬度、海拔、坡向、坡度等地形因子的影响。因而我们就本地区的油松林生长与地形因子和林分结构因子的变化规律设立67块固定标地进行试验研究,现将研究结果报道如下。一、试区的概况太岳山属太行山系,位于山西省中南部,东经111°50′—112°30′,北纬36°2′—37°5′。本区境内沟谷纵横,海拔959—2 566米,相对高差1 607米,属中山区。土壤是山地褐土,质地轻壤、沙壤,呈微酸性,肥力中等。中心区的年平均气温7.8℃,1
Forests and ecological environment are an interconnected, interacting and mutual restraint unity. And the distribution of the forest, the most important factor in the growth and development of moisture and temperature, but also by the latitude, elevation, aspect, gradient and other terrain factors. Therefore, we set up 67 fixed land plots for the study of the growth of Pinus tabulaeformis in this region and the variation of topographical factors and stand structure factors. The results are reported as follows. I. Overview of the Trial Area Taiyue Mountain is a part of the Taihang Mountains. It is located in the central and southern part of Shanxi Province, east longitude 111 ° 50’-112 ° 30 ’and north latitude 36 ° 2’-37 ° 5’. The region vertical and horizontal valleys, 959-2 566 meters above sea level, the relative elevation of 1 607 meters, is in Zhongshan District. Soil is a mountain of cinnamon, light soil texture, sandy soil, was slightly acidic, moderate fertility. The average annual temperature in the center of 7.8 ℃, 1