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一、概况云杉人工林间伐试验开始于1932年秋末。标准地设于勃兰特巴尔泊石楠平原的格罗斯坦特人工林内。试验地海拔高85米,年平均温度6.7℃,年平均降水量约700毫米。土壤为粗砂土,个别具有砾石层。土质重灰化,距地30—35厘米深处有铁盘层,厚约25厘米。试验地原系石楠荒地,造林前用开沟犁翻地,作了全面整地。1896年春用4龄云杉苗造林,行株距为125×78厘米。云杉与比
I. Overview Spruce plantation thinning test began in late autumn 1932. The standard is located in the Grove Tate plantation on the Branthropan Plains. Experimental altitude of 85 meters, the average annual temperature of 6.7 ℃, the average annual rainfall of about 700 mm. The soil is coarse sand, with individual gravel layers. Heavy gray soil, from the depths of 30-35 cm iron plate layer, about 25 cm thick. The original test heathland heath, before dredging with plowing the ground, made a comprehensive preparation. Spring 1896 with 4-year-old spruce seedlings afforestation, line spacing of 125 × 78 cm. Spruce and ratio