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在斯维尔德洛夫地区乌拉尔林业试验站,从1970年到1972年研究了人工林密度对其生长的影响,调查了1.412公顷由播种和植苗培育的松树人工林,试验地块最小面积为0.8公顷,最大面积为100公顷,按森林植被亚带根据人工林的密度,设置了83个试验小区,其分布如表1. 从表1材料可看出在斯维尔德洛夫地区营造的人工林有较低的密度。为了分析人工林密度对生长的影响,在南方泰加林和草原松桦林,选取了在各种草和浆果松树林型采伐迹地,犁沟栽植的12年生松树幼林,共选择造林保存率高的(不低
At the Urals Forestry Station in the Sverdlov region, from 1970 to 1972, the effects of plantation density on its growth were studied. A total area of 1.412 hectares was planted and planted with pine plantations. The minimum area of the experimental plots was 0.8 Hectare, the largest area of 100 hectares, according to the forest vegetation subtropical plantation according to the density of 83 experimental plot, the distribution of the Table 1. From Table 1 material can be seen in the Sverdlov area to create a plantation Have a lower density. In order to analyze the effect of plantation density on growth, young 12-year-old pine trees planted in furrows of various grass and berry pine types in the deciduous Betula platyphridum in the south of the country were selected for their high preservation rate (Not low