FOREST RESOURCES WANAGEMENT ›› 2017›› Issue (2): 28-33.doi: 10.13466/j.cnki.lyzygl.2017.02.006
• Scientific Research • Previous Articles Next Articles
LIU Sihai1(), ZENG Weisheng2(
)
Received:
2017-02-05
Revised:
2017-03-24
Online:
2017-04-28
Published:
2020-10-10
Contact:
ZENG Weisheng
E-mail:1694280017@qq.com;zengweisheng@afip.com.cn
CLC Number:
LIU Sihai, ZENG Weisheng. Large-scale Individual Tree Growth Models for Pinus massoniana in China[J]. FOREST RESOURCES WANAGEMENT, 2017, (2): 28-33.
Tab.1
Statistics of sample trees in two modeling populations for Masson pine
总体 | 样本量/株 | 变量 | 平均值 | 最小值 | 最大值 | 标准差 | 变动系数/% |
---|---|---|---|---|---|---|---|
总体1 | 147 | 胸径/cm | 16.7 | 1.5 | 47.2 | 11.9 | 73.5 |
树高/m | 12.0 | 2.0 | 27.6 | 7.2 | 60.9 | ||
年龄/a | 308.1 | 3.0 | 52.0 | 12.3 | 61.0 | ||
总体2 | 151 | 胸径/cm | 16.4 | 1.2 | 40.1 | 11.8 | 71.8 |
树高/m | 12.3 | 1.6 | 30.3 | 7.2 | 58.8 | ||
年龄/a | 26.4 | 5.0 | 65.0 | 15.9 | 60.2 |
Tab.2
Parameter estimates and determination coefficients of six average growth models for Masson pine
目标变量 | 模型 | 参数估计值 | 确定系数 R2 | ||
---|---|---|---|---|---|
a | b | c | |||
胸径 | (1) | 35.11 | 16.27 | 0.1161 | 0.7949 |
(2) | 42.12 | 0.04520 | 2.034 | 0.7857 | |
(3) | 38.60 | 3.766 | 0.06644 | 0.7909 | |
(4) | 72.16 | 43.07 | 7.044 | 0.7830 | |
(5) | 61.52 | 1.068 | 0.01723 | 0.7777 | |
(6) | -4.223 | 1.103 | -0.006936 | 0.7803 | |
树高 | (1) | 21.50 | 8.890 | 0.1156 | 0.7145 |
(2) | 24.19 | 0.04979 | 1.534 | 0.7075 | |
(3) | 22.71 | 2.901 | 0.07391 | 0.7120 | |
(4) | 35.62 | 28.44 | 5.864 | 0.7044 | |
(5) | 26.84 | 1.077 | 0.03305 | 0.7040 | |
(6) | -1.415 | 0.8065 | -0.007095 | 0.7097 |
Tab.3
Parameter estimates and statistics of growth models with regions and origins in variables
目标变量 | 参数估计值 | 统计指标 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
a | a2 | b | c | c1 | c2 | R2 | SEE | TRE/% | ASE/% | MPE/% | MPSE/% | ||
胸径 | 36.74 | — | 16.92 | 0.09889 | 0.02897 | — | 0.8303 | 4.88 | 0.08 | -0.01 | 3.41 | 29.32 | |
树高 | 24.65 | -4.01 | 9.116 | 0.08737 | 0.02663 | 0.02144 | 0.7401 | 3.70 | -0.03 | -0.34 | 3.49 | 27.85 |
Tab.4
Parameter estimates and statistics of growth models in different regions and for different origins
目标 变量 | 地域 起源 | 参数估计值 | 拐点 年龄/a | 统计指标 | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
a | b | c | R2 | SEE | TRE/% | ASE/% | MPE/% | MPSE/% | |||
胸径 | 总体1 | 36.74 | 16.92 | 0.1279 | 22 | 0.8248 | 5.00 | 0.50 | 0.46 | 5.06 | 31.21 |
总体2 | 36.74 | 16.92 | 0.09889 | 29 | 0.8357 | 4.80 | -0.33 | -0.47 | 4.72 | 27.47 | |
树高 | 总体1天然 | 20.64 | 9.116 | 0.1354 | 16 | 0.7592 | 3.17 | -3.34 | -4.20 | 6.09 | 22.03 |
总体1人工 | 24.65 | 9.116 | 0.1140 | 19 | 0.7641 | 3.94 | 1.86 | 0.42 | 7.92 | 31.66 | |
总体2天然 | 20.64 | 9.116 | 0.1088 | 20 | 0.7630 | 3.57 | 2.47 | 2.11 | 6.25 | 29.73 | |
总体2人工 | 24.65 | 9.116 | 0.08737 | 25 | 0.6585 | 4.31 | -1.38 | -0.09 | 8.69 | 27.67 |
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