沙松人工林生长与立地因子的关系

The Relationships between the Growth of Abies holophylla Maxim. Plantation and the Site Factors

根据黑龙江省 6个林业局的 4 4块沙松人工林标准地资料 ,以其平均优势木的解析材料确定 2 0年生优势木树高 .按单项立地因子实际分布区间进行 3组以上的分组 ,然后进行方差分析 ,计算差异显著 ,再进行多重比较 ,分析各因子的变化规律 ,并求算出沙松人工林 2 0年生优势木树高与立地因子的相关系数。通过上述研究明确了沙松人工林生长与立地因子的关系 ,初步确定了沙松人工林适宜的立地条件为 :阴坡、半阴坡 ,中下坡位 ,坡度8°～ 2 5°的缓斜坡 ,土壤A层厚度 2 0cm以上 ,有效土层厚度 (A +B层 ) 30～ 4 5cm以上。

Based on the data of 44 standard sites of Abies holophylla plantations in six forestry bureaus of Heilongjiang Province, the dominant height of twenty-year-old plantations was determined according to the analytic material of the average dominant trees. The actual distribution area of single site factor was divided into more than three groups for variance analysis. In order to obtain the changing regularity of each factor, the relevant coefficients between the height of dominant trees and site factors were calculated based on significant differences. The result manifests the relationship between the growth of Abies holophylla Maxim. plantation and site factors. The suitable site factors for Abies holophylla Maxim. are initially determined as follows: shady slope, slope between sunny slope and shady one, the slowly varied slope of middle and lower slope with 8°～25°, the soil thickness of A level is more than 20 cm, the thickness of effective soil layer (A together with B) more than 30～45 cm.