用计算机模拟试验的方法，对杉木和马尾松平均树高、平均胸径及最大密度的数学模型的预报有效性进行检验。
This paper deals with the effectiveness of H-HA models, D-H models and maximum density-D models of Chinese fir and Masson pine, making use of computerized simulation tests.
而在光照和水分供应充足的条件下，榉树的苗木高、地径平均生长量是庇荫、水分供应相对少的2.8倍。
The height and basal diameter growth with sufficient light and water supply was 2.8 times of seedlings under shady conditions and with insufficient water.
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