不同造林密度马尾松生长轮特性及其径向变异

研究了５种造林密度，１５年生马尾松生长轮特性，包括生长轮宽度，晚材率和管胞列数及其径向变异规律。结果表明：造林密度对马尾松生长轮宽度，晚材率和管胞列数的影响较大，经方差分析达到统计学的显著水平，造林密度与生长轮宽度和管胞列数成反相关关系，与晚材率成正相关关系。同时，年龄对生长轮宽度、晚材率和管胞列数的影响亦显著，且符合一般规律。但不同造林；密度生长轮特性差异显著程度不同，较低和较高的造林密度各生长

STUDY ON THE FEATURE OF THE GROWTH RING AND ITS RADIA VARITIES OF PLANTING DENSITY OF MASSON PINE

This paper studied the feature of growth ring including the growth ring width,propertion of late wood and tracheid row and their variance regulanty for 15 years Masson Pine plantions with 5 different planting density The results show that the planting density greatly affect the growth ring width,propertion of late wood and tracheid row through variance analysis Planting density is negative correlation with the growth ring width and tracheid row,and is positve correlation with the propertion of late wood Meanwhile age also greatly affect the growth ring width,propertion of late wood and tracheid row which same as the common law The feature of the growth ring of different planting density differ in lever of significance which are smaller as planting density too small or too dense,but tracheid row decreased rapidly with their age