The radial variation patterns of wood density in Pinus elliottii and Pinus teada planted with different tree spacing in Hunan Province and Jiangsu Province were studied by x-ray wood densitometry.

• 对两个地区不同种植密度的湿地松、火炬松进行了微密度分析，研究了种植密度对木材密度径向变异模式的影响。