<正>对杉木31株不同年龄、胸径的边材输导横截面积与叶面积及叶量与杉木胸径和叶面积及叶量间回归分析比较,得出了边材输导面积是叶面积和叶量更适合的估计者结论。求算出了用胸高直径处边材输导横截面积(S_(1·3))估测叶面积和叶量两个有用的方程:y叶量=0.1279+0.0591S_(1·3);y叶面积=0.6796+0.3574S_(1·3)。

Investigations into 31 trees (5~2 years old; 4.0~30.0 centimeter diameter breast height) for Cunningkamia lanceolata revealed that foliage mass (dry weight) and area can be estimated from regression on sapwood crossectional area (cm2) at DBH (1.3m) more precisely than diameter breast height. The sapwood was a significantly better estimater than DBH for foliage mass and area.Equations are Y foliage mass= 0.1279+ 0.0591S1:3, and Y foliage area= 0.6796+ 0.3574S1:3