| 加格达奇3种森林类型树高-胸径的曲线拟合 |
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| 引用本文： | 童洁,石玉立.加格达奇3种森林类型树高-胸径的曲线拟合[J].东北林业大学学报,2017,45(2). |
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| 作者姓名： | 童洁 石玉立 |
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| 作者单位： | 南京信息工程大学,南京,210044 |
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| 摘 要： | 基于加格达奇落叶松、樟子松、红松落叶松混合林共400个样本的树高、胸径实测数据,选用11个曲线模型,对模型参数求解,分析树高-胸径的相关性;并采用总误差、平均相对误差、误差及均方根误差这4项值验证拟合精度,探求3种树种的最优拟合模型。结果表明:树高和胸径相关性显著,基于11个模型的树高-胸径曲线拟合参数表明,幂函数模型为最优拟合模型,树高-胸径的关系符合异速生长规律。数据拟合精度的4项误差指标值表明,总体拟合效果理想,精度较高。
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| 关 键 词： | 树高 胸径 曲线拟合 加格达奇 |
Tree Height-diameter Model in Jiagedaqi |
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| Tong Jie,Shi Yuli.Tree Height-diameter Model in Jiagedaqi[J].Journal of Northeast Forestry University,2017,45(2). |
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| Authors: | Tong Jie Shi Yuli |
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| Abstract: | We used 12 height curve models with 400 kinds of height-diameter data of sampling trees,including Larix gmelinii Rupr.,Pinus sylvestris var.mongholica and the mixed forest of Pinus koraiensis Sieb.et Zucc.and Larix gmelinii Rupr.,to evaluate the coefficient determination and study the optimal fitting model of three different trees,the total error,average relative error,bias,and root mean square error for model accuracy and precision.With the 11 model of tree height diameter curve fitting parameters,significant correlation between tree height and diameter,the power model is the best fitting model.The height-diameter curves conform to the theory of allometric scaling.According to the speed error index data,the fitting is ideal with higher precision. |
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| Keywords: | Tree height Diameter Fitting curve Jiagedaqi |
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