Journal of Geo-information Science, Volume. 22, Issue 9, 1799(2020)
Figures & Tables(14)
Fig. 5. Variograms founction and related parameters of all experimental groups
Fig. 6. Comparison of the results predicted by the three methods in D2703, D676, D169 and D43
Fig. 7. The change of RMSE of GRNN, RF and Ordinary Kriging when the number of sampling points decreases
Table 1. Variance analysis of soil organic matter
View tableView in ArticleTable 1. Variance analysis of soil organic matter
方差来源 偏差平方和 自由度 Df 均方 F P 用地类型 组间 351.750 4 87.938 6.871 0.000 组内 1023.868 80 12.796 总体 1375.618 84 土壤质地 组间 356.405 3 118.802 9.442 0.000 组内 1019.213 81 12.583 总体 1375.618 84 畜禽粪便利用强度 组间 241.351 5 48.270 3.362 0.008 组内 1134.267 79 14.358 总体 1375.618 84 土壤类型 组间 0.945 2 0.472 0.028 0.972 组内 1374.674 82 16.764 总体 1375.618 84 植被指数 组间 17.592 2 8.796 0.531 0.590 组内 1358.027 82 16.561 总体 1375.618 84
Table 2. Descriptive statistics of soil organic matter in all experimental groups in the study area
View tableView in ArticleTable 2. Descriptive statistics of soil organic matter in all experimental groups in the study area
实验组 极大值/ （g/kg） 极小值/ （g/kg） 平均值/ （g/kg） 标准差/ （g/kg） 变异 系数 偏度 峰度 K-S双侧 显著性 D2703 24.73 1.20 10.49 3.91 37.28 0.147 -0.098 0.302 D1352 24.73 1.65 10.53 3.92 37.23 0.159 -0.003 0.632 D676 24.73 1.65 10.58 4.11 38.87 0.318 0.036 0.640 D339 24.73 1.81 10.55 3.94 37.32 0.223 0.292 0.946 D169 22.98 1.98 10.20 3.99 39.08 0.290 0.112 0.964 D85 18.05 2.03 10.93 4.05 37.01 -0.181 -0.804 0.934 D43_1 17.97 4.35 11.07 3.46 31.24 -0.187 -0.616 0.972 D43_2 17.73 2.98 10.07 4.17 41.39 0.122 -0.893 0.951 D43_3 17.84 3.53 11.10 3.53 31.80 -0.091 -0.900 0.855 D43_4 19.67 2.02 10.33 4.04 39.13 0.128 -0.064 0.906 D43_5 17.68 2.19 10.39 4.46 42.90 -0.329 -0.998 0.445 D22_1 18.28 3.53 10.70 4.30 40.13 0.293 -0.988 0.611 D22_2 17.61 3.91 11.28 3.84 34.03 -0.037 -0.634 0.940 D22_3 16.40 3.72 10.49 3.60 34.29 -0.380 -0.692 0.783 D22_4 15.34 4.29 10.56 3.24 30.72 -0.320 -0.825 0.912 D22_5 17.86 2.36 9.35 4.36 46.60 0.260 -0.540 0.999
Table 3. Soil organic matter content grading standard
View tableView in ArticleTable 3. Soil organic matter content grading standard
土壤属性 丰富 较丰富 中等 较缺乏 缺乏 极缺乏 有机质/（g/kg） >40 30~40 20~30 10~20 6~10 < 6
Table 4. Prediction accuracy of GRNN, RF and Ordinary Krigingin all experimental groups
View tableView in ArticleTable 4. Prediction accuracy of GRNN, RF and Ordinary Krigingin all experimental groups
实验组 RMSE MRE/% MAE Krige GRNN RF Krige GRNN RF Krige GRNN RF D2703 2.82 3.11 2.99 26.89 29.59 28.92 2.21 2.43 2.35 D1352 3.02 3.17 3.01 29.54 30.28 29.50 3.02 2.46 2.36 D676 3.45 3.34 3.23 33.00 31.94 30.50 2.74 2.65 2.57 D339 3.38 3.17 3.17 35.60 30.64 31.19 2.82 2.47 2.53 D169 3.55 3.41 3.31 35.92 36.64 34.39 2.83 2.75 2.61 D85 4.10 3.17 2.96 43.76 33.37 30.45 3.47 2.72 2.46 D43_1 3.36 2.84 2.72 30.40 25.63 23.73 2.74 2.31 2.18 D43_2 4.13 3.19 3.11 44.58 34.52 33.70 3.34 2.70 2.65 D43_3 3.68 3.14 3.31 35.53 30.26 31.93 3.17 2.67 2.91 D43_4 3.95 2.76 3.18 44.86 33.59 37.36 3.21 2.36 2.69 D43_5 4.69 3.42 3.61 67.44 38.46 47.36 4.06 2.70 3.01 D22_1 4.34 3.22 3.42 43.60 35.06 33.76 3.77 2.86 2.91 D22_2 4.31 2.43 2.62 65.64 24.60 26.55 3.83 2.13 2.28 D22_3 3.90 2.89 3.07 77.11 27.63 33.04 3.54 2.27 2.64 D22_4 3.53 2.56 2.86 58.38 23.23 27.42 3.03 2.18 2.45 D22_5 4.31 2.98 2.98 146.35 35.83 41.13 3.79 2.44 2.55
Table 5. Spatial correlation analysis of all experimental groupsamples
View tableView in ArticleTable 5. Spatial correlation analysis of all experimental groupsamples
实验组 平均最短距离/m Moran's I 值Z 得分P 值实验组 平均最短距离/m Moran's I 值Z 得分P 值D2703 371.45 0.35 56.78 0.00 D43_3* 2615.74 0.15 1.15 0.25 D1352 425.63 0.33 30.83 0.00 D43_4* 3109.01 0.15 1.30 0.19 D676 567.68 0.33 14.99 0.00 D43_5* 2909.11 0.08 0.83 0.41 D339 810.79 0.20 8.24 0.00 D22_1* 4237.90 -0.32 -1.39 0.17 D169 1285.91 0.17 5.68 0.00 D22_2* 4384.49 -0.15 -0.53 0.60 D85 1914.45 0.19 3.06 0.00 D22_3* 3662.95 -0.10 -0.19 0.85 D43_1 2792.95 0.22 2.41 0.02 D22_4* 4342.87 0.10 0.74 0.46 D43_2 3110.80 0.14 1.52 0.13 D22_5* 4723.02 -0.11 -0.48 0.63
Table 6. Detected result of three influence factor of soil organic matter
View tableView in ArticleTable 6. Detected result of three influence factor of soil organic matter
实验组 土地利用类型 土壤质地 畜禽粪便影响强度 q 值p 值q 值p 值q 值p 值D2703 0.182 0.000 0.199 0.000 0.148 0.000 D1352 0.209 0.000 0.190 0.000 0.139 0.000 D676 0.198 0.000 0.233 0.000 0.171 0.000 D339 0.212 0.000 0.189 0.000 0.138 0.000 D169 0.210 0.000 0.229 0.000 0.202 0.000 D85 0.256 0.067 0.259 0.016 0.175 0.035 D43 0.500 0.004 0.177 0.071 0.345 0.050 D22 0.496 0.016 0.477 0.049 0.742 0.034
Table 7. The correlation analysis between the observed values and predicted values of GRNN, RF and Ordinary Kriging
View tableView in ArticleTable 7. The correlation analysis between the observed values and predicted values of GRNN, RF and Ordinary Kriging
实验组 Krige GRNN RF 实验组 Krige GRNN RF D2703 0.686** 0.608** 0.642** D43_3 0.155 0.388* 0.392** D1352 0.635** 0.590** 0.637** D43_4 0.153 0.669** 0.576** D676 0.543** 0.581** 0.616** D43_5 -0.067 0.591** 0.577** D339 0.450** 0.580** 0.578** D22_1 -0.137 0.572** 0.590** D169 0.433** 0.500** 0.545** D22_2 -0.343 0.709** 0.630** D85 0.175 0.599** 0.660** D22_3 -0.094 0.584** 0.440* D43_1 0.210 0.532** 0.594** D22_4 -0.102 0.547** 0.398* D43_2 0.129 0.559** 0.627** D22_5 0.054 0.635** 0.762**
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Mingjie LIU, Zhuokui XU, Yunbing GAO, Jing YANG, Yuchun PAN, Bingbo GAO, Yanbing ZHOU, Wanpeng ZHOU, Ling WANG.
Paper Information
Received: Aug. 13, 2019
Accepted: --
Published Online: Apr. 23, 2021
The Author Email: GAO Yunbing (gybgis@163.com)
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