【摘要】 实验形数具有正形数不受树高影响及胸高形数测算容易的特点,并且同一树种在较小区域和较大区域的林木株数,按实验形数级的分布状态基本一致。但从实验形数的变动幅度上讲,在较小区域和较大区域内是有很大差别的。研究结果表明:林分平均直径,平均树高基本相同时,在较小区域内实验形数的变动幅度为0.32~0.47,极值差为0.15,而在较大区域内实验形数的变动幅度为0.23~0.47,极值差为0.24。更多还原

【Abstract】 The experimental form factors have the advantages of the normal form factor being not affected by the tree height and breast-height form factor easily measured.In smaller area and larger area,stem number of the same species has the distributed state in substantial agreement by the variation of experimental form factor.But there is a great difference between their experimental form factors.The reseach results show that when the diameter and tree height are almost the same,the variation of experimental form factor is 0.32～0.47 and the extremum difference is 0.15 in minor area,but the variation of experimental form factor is 0.23～0.47 and the extremum differences is 0.24.更多还原