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以东北林业大学帽儿山实验林场老山实验站的落叶松人工林为例．对３种初植密度（１．５ｍ ×２．０ｍ、２．５ｍ×２．５ｍ、３．０ｍ×３．０ｍ）林分的落叶松人工林木材解剖特征的径向变异模式进行研究。结 果表明：①微纤丝角、管胞壁厚与种植密度呈负相关；胞壁率与种植密度呈正相关。②管胞长度、管胞直径、微 纤丝角、管胞壁厚、胞壁率等指标均表现为差异显著。作为纸浆材培育宜选择 ３． ０ ｍ × ３． ０ ｍ的初植密度．有利 于提高纸张质量。
A Case Study of Larch Plantation at Lao Shan Experimental Station of Maoershan Experimental Forest Farm of Northeast Forestry University. The radial variations of wood anatomical characteristics of three larch plantations with different planting densities (1.5m × 2.0m, 2.5m × 2.5m, 3.0m × 3.0m) were studied. The results showed that: (1) Microfibril angle and tracheid wall thickness were negatively correlated with plant density; and cell wall rate and plant density were positively correlated. ② The tracheid length, tracheid diameter, microfibril angle, tracheid wall thickness, cell wall rate and other indicators showed significant differences. As a pulp culture should choose 3. 0 m × 3. Initial planting density of 0 m. Help to improve the quality of paper.