长白落叶松母树林疏伐密度研究

摘要

通过对红旗林场52年生长白落叶松母树林不同疏伐密度处理后14个主要性状统计分析，结果表明，疏伐处理对长白落叶松母树多个性状造成了显著影响。利用聚类分析和主分量分析法将存在显著差异性和相关性的9个性状可分成4类，分别代表了树冠性状、单株结实量、公顷结实量和出种率性状。通过这4类性状在各主成分上得分值的加权比较表明，红旗林场52年生长白落叶松母树林疏伐抚育最佳密度是120株·hm-2。%Fourteen main characters of 52-year-old Larix olgensis seed trees after varying thinning densities in Hongqi forest farm were analyzed. Result shows that：thinning cause significant effects on many properties of Larix olgensis seed trees. Nine traits which existed significant differences by using cluster analysis ＆ principal component analysis can be divided into four categories, representing the crown traits, yield per plant, yield per hectare, weight percentage of seed in cone. Comparison of weighting of scores in each principal component by these four traits show that the optimal tending thinning density for 52-year-old Larix olgensis seed trees in Hongqi forest farm are 120 trees · hm-2.