The radial variation patterns of wood density in 19 chinese fir provenances were studied by means of x - ray wood densitometry 以微密度分析对19个种源杉木的木材密度径向变异模式进行了研究。
2.
There existed a certain degree of variation in the radial variation patterns of average ring density among provenances and among individual trees within provenances 不同种源间和种源内株间，年轮平均密度的径向变异曲线都存在一定的变异，但此变异主要表现在种源内株间。
