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研究结果表明:幂函数是描述四川现实马尾松天然林立木胸径与冠幅关系的最佳函数形式,其回归模型为:lnCw=-0.69690+0.71934lnD.[r=0.98852,Q=25.66230,S=0.05021,F=435736.8》F_(0.05)(1,10176)=3.84];标准状态下的马尾松天然林立木胸径与冠幅的关系为:lnCw=-0.88785+0.71934lnD;并由此探讨了马尾松天然林的理论密度、最大密度和0.6～0.9时的理论密度,对于四川马尾松天然林经营有较大参考价值。
The results showed that the power function was the best function to describe the relationship between DBH and crown width of natural Pinus massoniana plantations in Sichuan Province. The regression model was: lnCw = -0.69690 + 0.71934lnD. [R = 0.98852, Q = 25.66230, S = 0.05021, F = 435736.8 "F_ (0.05) (1,10176) = 3.84]. The relationship between the DBH and the crown of Pinus massoniana plantation under standard conditions was: lnCw = -0.88785 + 0.71934lnD. The theoretical density, the maximum density and the theoretical density of 0.6-0.9 for the natural forests of Pinus massoniana have great reference value for the management of the natural forest of Masson pine in Sichuan Province.