FOREST RESOURCES WANAGEMENT ›› 2020, Vol. 0 ›› Issue (5): 89-99.doi: 10.13466/j.cnki.lyzygl.2020.05.014
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MIN Zhiqiang1, HU Yunyun1(), WANG Dejun1, SUN Jingmei1, LI Hongtao1, LI Weizhong2
Received:
2020-07-29
Revised:
2020-09-27
Online:
2020-10-28
Published:
2020-11-30
Contact:
HU Yunyun
E-mail:huyy1985@126.com
CLC Number:
MIN Zhiqiang, HU Yunyun, WANG Dejun, SUN Jingmei, LI Hongtao, LI Weizhong. Study on Growth Model of DBH and Height Based on Dummy Variable for Natural oak Forest in Qinba Mountain Area[J]. FOREST RESOURCES WANAGEMENT, 2020, 0(5): 89-99.
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URL: http://www.lyzygl.com.cn/EN/10.13466/j.cnki.lyzygl.2020.05.014
Tab.2
Site factor assignment
立地因子 | 编号 | 取值范围 | 优势木生长量/ (m3/hm2) | 得分值 | |
---|---|---|---|---|---|
海拔 | 1 | <500 | 0.037 | 1 | |
2 | 500~1000 | 0.0438 | 2 | ||
3 | 1000~1500 | 0.0552 | 4 | ||
4 | 1500~2000 | 0.059 | 5 | ||
5 | ≥2000 | 0.0509 | 3 | ||
坡向 | 1 | 北 | 0.0408 | 1 | |
2 | 东北 | 0.0381 | 1 | ||
3 | 东 | 0.0552 | 4 | ||
4 | 东南 | 0.0626 | 5 | ||
5 | 南 | 0.0554 | 4 | ||
6 | 西南 | 0.0532 | 3 | ||
7 | 西 | 0.0521 | 3 | ||
8 | 西北 | 0.0497 | 2 | ||
9 | 无坡向 | 0.0487 | 2 | ||
土壤厚度 | 1 | 厚 | 0.0606 | 5 | |
2 | 中 | 0.0517 | 3 | ||
3 | 薄 | 0.0481 | 1 |
Tab.5
Principal component load of site factors
立地因子 | 主要成份 | ||
---|---|---|---|
1 | 2 | 3 | |
地貌(LF) | 0.777 | 0.544 | 0.098 |
海拔(ELE) | 0.823 | 0.467 | 0.069 |
坡向(ASP) | 0.089 | 0.246 | -0.558 |
坡位(SLPP) | 0.206 | 0.032 | 0.618 |
坡度(SLP) | -0.137 | 0.024 | 0.542 |
土壤类型(ST) | -0.592 | 0.642 | -0.073 |
土壤质地(SQ) | -0.386 | 0.107 | 0.391 |
土壤厚度(SD) | 0.686 | -0.56 | -0.048 |
腐殖质厚度(BUFF) | 0.241 | -0.114 | 0.021 |
Tab.6
Goodness of fit and evaluation accuracy of tree height and diameter at breast height growth model
因变量类别 | 模型 | 参数值 | 拟合指标 | 评价指标 | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
a | b | c | RMSE | R2 | TRE | Pa | |||||||||||
树高(H) | Richards | 46.44 | 0.41 | 0.00 | 2.26 | 0.61 | 2.26 | 97.84 | |||||||||
Gompertz | 21.23 | 1.37 | 0.02 | 2.23 | 0.62 | 2.08 | 97.63 | ||||||||||
Logistic | 13.23 | 1.81 | 0.08 | 2.51 | 0.51 | 0.98 | 97.63 | ||||||||||
Schumacher | 14.49 | 7.42 | 2.59 | 0.48 | 3.13 | 97.51 | |||||||||||
Richards | 25.66 | 0.03 | 0.82 | 3.98 | 0.66 | 3.36 | 97.24 | ||||||||||
胸径(DBH) | |||||||||||||||||
Gompertz | 49.67 | 2.15 | 0.02 | 3.52 | 0.74 | 2.20 | 97.59 | ||||||||||
Logistic | 21.14 | 3.53 | 0.08 | 4.19 | 0.63 | 1.58 | 97.15 | ||||||||||
Schumacher | 30.29 | 18.44 | 4.16 | 0.63 | 1.72 | 97.24 |
Tab.7
Evaluation index of tree height growth model with site grade as dummy variable
参数 | 评价指标 | ||||||
---|---|---|---|---|---|---|---|
RMSE | R2 | TRE | Pa | SSE | AIC | BIC | |
2.234 | 0.615 | 2.081 | 97.63 | 1853.762 | 1395.12 | 1409.86 | |
a | 1.924 | 0.716 | 0.015 | 98.25 | 1361.66 | 1336.44 | 1360.99 |
b | 1.957 | 0.706 | -0.001 | 98.22 | 1409.38 | 1342.79 | 1367.35 |
c | 1.925 | 0.715 | -0.011 | 98.25 | 1364.14 | 1336.77 | 1361.33 |
a,b | 1.920 | 0.717 | -0.005 | 98.26 | 1356.28 | 1337.71 | 1372.08 |
b,c | 1.923 | 0.716 | -0.010 | 98.25 | 1361.18 | 1338.37 | 1372.75 |
a,c | 1.919 | 0.716 | 0.001 | 98.26 | 1355.12 | 1337.55 | 1371.92 |
a,b,c | 1.918 | 0.717 | -0.004 | 98.26 | 1354.07 | 1339.41 | 1383.60 |
Tab.8
Goodness of fit and evaluation index of growth models of H
哑变量 | 评价指标 | ||||||||
---|---|---|---|---|---|---|---|---|---|
立地质量等级 | 竞争等级 | RMSE | R2 | TRE | Pa | SSE | AIC | BIC | |
a,b | 1.92 | 0.717 | -0.005 | 98.26 | 1356.28 | 1337.71 | 1372.08 | ||
a,b | a | 1.821 | 0.745 | -0.002 | 98.35 | 1219.84 | 1324.14 | 1387.99 | |
a,b | b | 1.832 | 0.742 | 0.001 | 98.34 | 1235.01 | 1326.42 | 1390.26 | |
a,b | a,b | 1.820 | 0.745 | -0.003 | 98.35 | 1218.89 | 1330.00 | 1423.31 |
Tab.9
Evaluation index of DBH growth model with dumb competition grade
参数 | 评价指标 | ||||||
---|---|---|---|---|---|---|---|
RMSE | R2 | TRE | Pa | SSE | AIC | BIC | |
3.523 | 0.737 | 2.199 | 97.59 | 3962.21 | 1746.98 | 1677.92 | |
a | 2.839 | 0.829 | 0.091 | 98.15 | 2966.66 | 1480.11 | 1504.67 |
b | 2.942 | 0.817 | 0.057 | 98.08 | 3185.83 | 1493.26 | 1517.82 |
c | 2.808 | 0.833 | 0.018 | 98.17 | 2901.76 | 1476.03 | 1500.59 |
a,b | 2.810 | 0.833 | 0.014 | 98.17 | 2906.33 | 1478.32 | 1512.70 |
b,c | 2.801 | 0.833 | 0.011 | 98.17 | 2887.19 | 1477.10 | 1511.48 |
a,c | 2.804 | 0.834 | 0.010 | 98.17 | 2892.45 | 1477.44 | 1511.81 |
a,b,c | 2.796 | 0.835 | 0.003 | 98.18 | 2877.79 | 1478.50 | 1522.70 |
Tab.10
Goodness of fit and evaluation index of growth models of H
哑变量 | 立地质量等级 | ||||||||
---|---|---|---|---|---|---|---|---|---|
立地质量等级 | 竞争等级 | RMSE | R2 | TRE | Pa | SSE | AIC | BIC | |
a,c | 2.804 | 0.834 | 0.01 | 98.17 | 2892.45 | 1477.44 | 1511.81 | ||
a,c | a | 2.712 | 0.844 | 0.025 | 98.23 | 2706.93 | 1471.21 | 1535.05 | |
a,c | c | 2.692 | 0.847 | 0.038 | 98.25 | 2667.55 | 1468.50 | 1532.35 | |
a,c | a,c | 2.728 | 0.843 | 0.212 | 98.22 | 2739.21 | 1479.40 | 1572.70 |
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