运用所拟合的数量化回归模型预测马尾松幼林的树高和胸径可达到较高的精度。
The fitted quantitative regression models could be used to forecast height and DBH of the young stands, and the forecast precision was high.
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.
而马尾松的树高生长虽然较快，但自然整枝较差，树干不通直，且虫害较严重，抗性差；
P. massoniana showed fast height growth but poor natural trimming , crooked bole, low insect pest resistance.
低磷水平下马尾松种源磷效率与磷素利用效率有关，而与磷素吸收效率相关性较小，磷效率和磷素利用效率高的种源其干物质积累量较高。
PE was significantly and positively related to P use efficiency, not related to P absorption. The provenances with higher PE had greater dry matter accumulation.
研究表明，随着溶液P素浓度的升高，马尾松各参试种源的苗高生长、P素吸收总量均有不同程度的增加，但其变化因种源而异。
The results indicated that height growth and the amount of P uptake increased diversely with phosphorus raise for the provenances tested.
研究表明，随着溶液P素浓度的升高，马尾松各参试种源的苗高生长、P素吸收总量均有不同程度的增加，但其变化因种源而异。
The results indicated that height growth and the amount of P uptake increased diversely with phosphorus raise for the provenances tested.
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