中国农业科技导报 ›› 2025, Vol. 27 ›› Issue (3): 172-182.DOI: 10.13304/j.nykjdb.2023.0695
• 生物制造 资源生态 • 上一篇
米洋辰(), 赵政, 王呈玉, 闫丽娜, 冯秋苹, 刘淑霞, 刘世杰(
)
收稿日期:
2023-09-18
接受日期:
2024-03-28
出版日期:
2025-03-15
发布日期:
2025-03-14
通讯作者:
刘世杰
作者简介:
米洋辰 E-mail: 1260345053@qq.com;
基金资助:
Yangchen MI(), Zheng ZHAO, Chengyu WANG, Lina YAN, Qiuping FENG, Shuxia LIU, Shijie LIU(
)
Received:
2023-09-18
Accepted:
2024-03-28
Online:
2025-03-15
Published:
2025-03-14
Contact:
Shijie LIU
摘要:
为选择有效的秸秆还田方式,通过长期定位试验和室内分析相结合的方式探究不同秸秆还田方式下土壤水分特征曲线变化。设置常规耕作(CK)、秸秆翻埋(SO)、秸秆轮耕还田(SR)、秸秆碎混还田(SCM)、秸秆覆盖还田(SM)、秸秆留高茬还田(HSR)、秸秆条带还田(SP)共7个处理,通过水分特征曲线适宜模型的筛选、土壤水分常数及比水容量等的测定,研究秸秆还田方式对土壤持水性能的影响。结果表明,利用Gardner、Rational和指数模型将实测的数据进行拟合,Gardner方程拟合效果好,均方根误差、绝对平均误差、相对误差较小,决定系数(R2)均大于0.990 0,可以作为适宜的土壤水分曲线模型。通过土壤水分特征曲线方程发现,土壤水吸力在压力膜仪内低吸力时土壤含水量最高,随着压力值的不断增大,土壤水分含量呈降低趋势,曲线的高度代表土壤持水能力的大小,各处理在0—20 cm耕层表现为SO>SR>SCM>SM>HSR>SP>CK,在20—40 cm犁底层表现为SO>SCM>SR>SM>HSR>SP>CK,秸秆还田处理与CK相比均有增大,SO处理在各土层的持水性较高。秸秆还田可以提升土壤持水性能,其中,SO处理水分特征曲线较高,土壤持水能力最好,可作为适合东北西部地区适宜的秸秆还田方式。
中图分类号:
米洋辰, 赵政, 王呈玉, 闫丽娜, 冯秋苹, 刘淑霞, 刘世杰. 不同秸秆还田方式对土壤水分特征曲线的影响[J]. 中国农业科技导报, 2025, 27(3): 172-182.
Yangchen MI, Zheng ZHAO, Chengyu WANG, Lina YAN, Qiuping FENG, Shuxia LIU, Shijie LIU. Influence of Straw Returning Method on Soil Moisture Curve[J]. Journal of Agricultural Science and Technology, 2025, 27(3): 172-182.
土层 Soil layer/cm | 参数 Parameter | 处理 Treatment | |||||||
---|---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | |||
0—20 | a | 0.200 3 | 0.437 4 | 0.372 0 | 0.404 9 | 0.325 1 | 0.251 3 | 0.237 3 | |
b | 0.361 2 | 0.123 3 | 0.215 4 | 0.240 0 | 0.390 7 | 0.321 4 | 0.326 0 | ||
决定系数R2 | 0.987 0 | 0.997 6 | 0.998 1 | 0.995 6 | 0.980 7 | 0.986 8 | 0.975 6 | ||
20—40 | a | 0.173 4 | 0.444 4 | 0.360 4 | 0.324 7 | 0.289 2 | 0.279 9 | 0.216 0 | |
b | 0.409 9 | 0.164 3 | 0.232 8 | 0.347 9 | 0.370 8 | 0.387 5 | 0.330 2 | ||
决定系数R2 | 0.943 3 | 0.963 7 | 0.976 7 | 0.998 2 | 0.981 0 | 0.967 6 | 0.944 8 |
表1 Gardner水分特征曲线方程参数
Table 1 Gardner moisture characteristic curve equation parameters
土层 Soil layer/cm | 参数 Parameter | 处理 Treatment | |||||||
---|---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | |||
0—20 | a | 0.200 3 | 0.437 4 | 0.372 0 | 0.404 9 | 0.325 1 | 0.251 3 | 0.237 3 | |
b | 0.361 2 | 0.123 3 | 0.215 4 | 0.240 0 | 0.390 7 | 0.321 4 | 0.326 0 | ||
决定系数R2 | 0.987 0 | 0.997 6 | 0.998 1 | 0.995 6 | 0.980 7 | 0.986 8 | 0.975 6 | ||
20—40 | a | 0.173 4 | 0.444 4 | 0.360 4 | 0.324 7 | 0.289 2 | 0.279 9 | 0.216 0 | |
b | 0.409 9 | 0.164 3 | 0.232 8 | 0.347 9 | 0.370 8 | 0.387 5 | 0.330 2 | ||
决定系数R2 | 0.943 3 | 0.963 7 | 0.976 7 | 0.998 2 | 0.981 0 | 0.967 6 | 0.944 8 |
土层 Soil layer/cm | 压力 Pressure/Pa | 相对误差 Relative error/% | ||||||
---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | ||
0.0 | 1.17 | 0.03 | 1.95 | 1.98 | 2.35 | 2.83 | 4.79 | |
1.0×105 | 0.91 | 0.05 | 0.48 | 0.73 | 1.97 | 1.51 | 2.10 | |
0—20 | 3.0×105 | 1.23 | 1.09 | 0.96 | 1.37 | 7.96 | 3.54 | 7.38 |
5.0×105 | 6.51 | 0.13 | 0.79 | 0.45 | 0.58 | 3.91 | 0.55 | |
1.0×106 | 7.06 | 0.08 | 1.14 | 1.06 | 3.40 | 2.08 | 4.16 | |
1.5×106 | 1.71 | 0.65 | 0.52 | 0.68 | 8.02 | 6.48 | 4.73 | |
0.0 | 1.37 | 0.04 | 4.18 | 1.68 | 3.11 | 1.39 | 6.62 | |
1.0×105 | 3.17 | 1.79 | 0.33 | 0.25 | 1.63 | 2.22 | 1.74 | |
20—40 | 3.0×105 | 3.68 | 3.32 | 5.50 | 1.80 | 8.03 | 10.98 | 10.09 |
5.0×105 | 8.93 | 3.13 | 2.41 | 2.08 | 3.19 | 3.56 | 9.40 | |
1.0×106 | 2.52 | 2.28 | 2.42 | 0.58 | 3.52 | 5.90 | 5.71 | |
1.5×106 | 24.34 | 2.97 | 2.25 | 0.18 | 2.47 | 3.40 | 6.30 |
表2 Gardner方程实测值与拟合值的相对误差
Table 2 Relative errors between measured and fitted values of the Gardner equation
土层 Soil layer/cm | 压力 Pressure/Pa | 相对误差 Relative error/% | ||||||
---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | ||
0.0 | 1.17 | 0.03 | 1.95 | 1.98 | 2.35 | 2.83 | 4.79 | |
1.0×105 | 0.91 | 0.05 | 0.48 | 0.73 | 1.97 | 1.51 | 2.10 | |
0—20 | 3.0×105 | 1.23 | 1.09 | 0.96 | 1.37 | 7.96 | 3.54 | 7.38 |
5.0×105 | 6.51 | 0.13 | 0.79 | 0.45 | 0.58 | 3.91 | 0.55 | |
1.0×106 | 7.06 | 0.08 | 1.14 | 1.06 | 3.40 | 2.08 | 4.16 | |
1.5×106 | 1.71 | 0.65 | 0.52 | 0.68 | 8.02 | 6.48 | 4.73 | |
0.0 | 1.37 | 0.04 | 4.18 | 1.68 | 3.11 | 1.39 | 6.62 | |
1.0×105 | 3.17 | 1.79 | 0.33 | 0.25 | 1.63 | 2.22 | 1.74 | |
20—40 | 3.0×105 | 3.68 | 3.32 | 5.50 | 1.80 | 8.03 | 10.98 | 10.09 |
5.0×105 | 8.93 | 3.13 | 2.41 | 2.08 | 3.19 | 3.56 | 9.40 | |
1.0×106 | 2.52 | 2.28 | 2.42 | 0.58 | 3.52 | 5.90 | 5.71 | |
1.5×106 | 24.34 | 2.97 | 2.25 | 0.18 | 2.47 | 3.40 | 6.30 |
土层 Soil layer/cm | 参数 Parameter | 处理 Treatment | ||||||
---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | ||
0—20 | a | 0.256 17 | 0.583 23 | 0.523 40 | 0.548 29 | 0.456 86 | 0.392 38 | 0.305 60 |
b | 0.006 46 | 0.441 44 | 0.208 50 | 0.141 64 | 0.108 88 | 0.266 58 | 0.014 06 | |
c | 0.335 32 | 1.327 67 | 0.951 50 | 0.699 74 | 0.726 52 | 1.570 95 | 0.387 55 | |
决定系数R2 | 0.993 61 | 0.999 04 | 0.999 80 | 0.997 60 | 0.998 10 | 0.999 89 | 0.973 01 | |
20—40 | a | 0.230 00 | 0.603 28 | 0.528 40 | 0.487 77 | 0.402 64 | 0.355 00 | 0.267 27 |
b | 0.029 80 | 0.979 93 | 0.199 40 | 0.088 77 | 0.036 10 | -0.012 50 | -0.004 31 | |
c | 0.552 48 | 2.542 92 | 1.003 60 | 0.768 47 | 0.517 19 | 0.253 09 | 0.237 93 | |
决定系数R2 | 0.995 90 | 0.996 36 | 0.992 50 | 0.999 49 | 0.994 72 | 0.993 02 | 0.978 50 |
表3 Rational水分特征曲线方程参数
Table 3 Rational moisture characteristic curve equation parameters
土层 Soil layer/cm | 参数 Parameter | 处理 Treatment | ||||||
---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | ||
0—20 | a | 0.256 17 | 0.583 23 | 0.523 40 | 0.548 29 | 0.456 86 | 0.392 38 | 0.305 60 |
b | 0.006 46 | 0.441 44 | 0.208 50 | 0.141 64 | 0.108 88 | 0.266 58 | 0.014 06 | |
c | 0.335 32 | 1.327 67 | 0.951 50 | 0.699 74 | 0.726 52 | 1.570 95 | 0.387 55 | |
决定系数R2 | 0.993 61 | 0.999 04 | 0.999 80 | 0.997 60 | 0.998 10 | 0.999 89 | 0.973 01 | |
20—40 | a | 0.230 00 | 0.603 28 | 0.528 40 | 0.487 77 | 0.402 64 | 0.355 00 | 0.267 27 |
b | 0.029 80 | 0.979 93 | 0.199 40 | 0.088 77 | 0.036 10 | -0.012 50 | -0.004 31 | |
c | 0.552 48 | 2.542 92 | 1.003 60 | 0.768 47 | 0.517 19 | 0.253 09 | 0.237 93 | |
决定系数R2 | 0.995 90 | 0.996 36 | 0.992 50 | 0.999 49 | 0.994 72 | 0.993 02 | 0.978 50 |
土层 Soil layer/cm | 压力 Pressure/Pa | 相对误差 Relative error/% | ||||||
---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | ||
0.0 | 0.06 | 0.02 | 0.01 | 0.08 | 0.08 | 0.02 | 0.99 | |
1.0×105 | 0.55 | 0.24 | 6.27 | 0.76 | 0.43 | 0.02 | 2.01 | |
0—20 | 3.0×105 | 1.55 | 0.57 | 0.28 | 2.16 | 2.67 | 11.03 | 3.55 |
5.0×105 | 5.10 | 1.14 | 3.93 | 1.48 | 6.08 | 13.24 | 18.42 | |
1.0×106 | 2.23 | 0.44 | 0.73 | 4.20 | 0.31 | 1.00 | 32.57 | |
1.5×106 | 17.77 | 2.99 | 0.44 | 0.77 | 1.42 | 0.89 | 29.72 | |
0.0 | 0.09 | 0.01 | 0.19 | 0.03 | 0.24 | 0.59 | 0.04 | |
1.0×105 | 0.18 | 0.26 | 0.86 | 0.18 | 5.02 | 1.12 | 0.76 | |
20—40 | 3.0×105 | 0.25 | 1.06 | 5.05 | 3.01 | 4.60 | 4.90 | 7.15 |
5.0×105 | 4.03 | 0.13 | 2.28 | 1.60 | 3.68 | 1.32 | 8.10 | |
1.0×106 | 3.50 | 2.51 | 1.54 | 1.14 | 1.34 | 8.03 | 4.72 | |
1.5×106 | 3.05 | 1.92 | 3.27 | 0.42 | 1.06 | 0.50 | 0.79 |
表4 Rational方程实测值与拟合值的相对误差
Table 4 Relative errors between measured and fitted values of the Rational equation
土层 Soil layer/cm | 压力 Pressure/Pa | 相对误差 Relative error/% | ||||||
---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | ||
0.0 | 0.06 | 0.02 | 0.01 | 0.08 | 0.08 | 0.02 | 0.99 | |
1.0×105 | 0.55 | 0.24 | 6.27 | 0.76 | 0.43 | 0.02 | 2.01 | |
0—20 | 3.0×105 | 1.55 | 0.57 | 0.28 | 2.16 | 2.67 | 11.03 | 3.55 |
5.0×105 | 5.10 | 1.14 | 3.93 | 1.48 | 6.08 | 13.24 | 18.42 | |
1.0×106 | 2.23 | 0.44 | 0.73 | 4.20 | 0.31 | 1.00 | 32.57 | |
1.5×106 | 17.77 | 2.99 | 0.44 | 0.77 | 1.42 | 0.89 | 29.72 | |
0.0 | 0.09 | 0.01 | 0.19 | 0.03 | 0.24 | 0.59 | 0.04 | |
1.0×105 | 0.18 | 0.26 | 0.86 | 0.18 | 5.02 | 1.12 | 0.76 | |
20—40 | 3.0×105 | 0.25 | 1.06 | 5.05 | 3.01 | 4.60 | 4.90 | 7.15 |
5.0×105 | 4.03 | 0.13 | 2.28 | 1.60 | 3.68 | 1.32 | 8.10 | |
1.0×106 | 3.50 | 2.51 | 1.54 | 1.14 | 1.34 | 8.03 | 4.72 | |
1.5×106 | 3.05 | 1.92 | 3.27 | 0.42 | 1.06 | 0.50 | 0.79 |
土层 Soil layer/cm | 参数 Parameter | 处理 Treatment | ||||||
---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | ||
0—20 | a | 0.075 38 | 0.305 64 | 0.255 10 | 0.228 54 | 0.114 64 | 0.116 40 | 0.108 70 |
b | -0.177 46 | -0.266 96 | -2.985 30 | -0.311 99 | -0.331 11 | -0.265 12 | -0.195 62 | |
c | 0.718 70 | 0.582 67 | 0.575 23 | 0.621 27 | 0.684 46 | 0.587 13 | 0.655 89 | |
决定系数R2 | 0.989 48 | 0.953 16 | 0.973 65 | 0.981 19 | 0.981 74 | 0.953 67 | 0.986 27 | |
20—40 | a | 0.079 47 | 0.297 73 | 0.214 22 | 0.141 59 | 0.109 95 | 0.094 19 | 0.083 11 |
b | -0.147 49 | -0.287 56 | -0.308 33 | -0.337 30 | -0.284 99 | -0.257 51 | -0.182 29 | |
c | 0.640 02 | 0.618 46 | 0.532 96 | 0.601 49 | 0.676 14 | 0.731 44 | 0.738 03 | |
决定系数R2 | 0.988 66 | 0.918 24 | 0.972 01 | 0.981 27 | 0.985 23 | 0.994 25 | 0.986 90 |
表5 指数经验方程拟合水分特征曲线方程参数
Table 5 Exponential empirical equation fitting moisture characteristic curve equation parameters
土层 Soil layer/cm | 参数 Parameter | 处理 Treatment | ||||||
---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | ||
0—20 | a | 0.075 38 | 0.305 64 | 0.255 10 | 0.228 54 | 0.114 64 | 0.116 40 | 0.108 70 |
b | -0.177 46 | -0.266 96 | -2.985 30 | -0.311 99 | -0.331 11 | -0.265 12 | -0.195 62 | |
c | 0.718 70 | 0.582 67 | 0.575 23 | 0.621 27 | 0.684 46 | 0.587 13 | 0.655 89 | |
决定系数R2 | 0.989 48 | 0.953 16 | 0.973 65 | 0.981 19 | 0.981 74 | 0.953 67 | 0.986 27 | |
20—40 | a | 0.079 47 | 0.297 73 | 0.214 22 | 0.141 59 | 0.109 95 | 0.094 19 | 0.083 11 |
b | -0.147 49 | -0.287 56 | -0.308 33 | -0.337 30 | -0.284 99 | -0.257 51 | -0.182 29 | |
c | 0.640 02 | 0.618 46 | 0.532 96 | 0.601 49 | 0.676 14 | 0.731 44 | 0.738 03 | |
决定系数R2 | 0.988 66 | 0.918 24 | 0.972 01 | 0.981 27 | 0.985 23 | 0.994 25 | 0.986 90 |
土层 Soil layer/cm | 压力 Pressure/Pa | 相对误差 Relative error/% | ||||||
---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | ||
0.0 | 1.27 | 0.02 | 14.05 | 7.35 | 4.07 | 1.14 | 4.85 | |
1.0×105 | 2.23 | 0.05 | 5.00 | 3.17 | 7.09 | 4.65 | 2.26 | |
0—20 | 3.0×105 | 3.63 | 1.08 | 3.33 | 0.03 | 3.35 | 7.69 | 6.60 |
5.0×105 | 7.37 | 0.13 | 6.18 | 6.89 | 6.26 | 13.15 | 6.03 | |
1.0×106 | 1.17 | 0.08 | 0.51 | 1.82 | 5.17 | 0.42 | 0.39 | |
1.5×106 | 3.50 | 0.65 | 8.31 | 7.50 | 11.52 | 18.39 | 6.00 | |
0.0 | 8.22 | 2.94 | 2.67 | 4.09 | 5.03 | 3.71 | 5.99 | |
1.0×105 | 3.58 | 9.17 | 3.53 | 6.24 | 6.38 | 3.22 | 2.51 | |
20—40 | 3.0×105 | 2.40 | 4.67 | 1.12 | 4.79 | 4.74 | 3.98 | 5.48 |
5.0×105 | 7.27 | 7.87 | 10.39 | 7.45 | 3.51 | 2.45 | 6.98 | |
1.0×106 | 5.37 | 1.09 | 0.44 | 2.01 | 3.01 | 2.26 | 5.03 | |
1.5×106 | 8.74 | 7.57 | 10.60 | 12.22 | 7.09 | 2.04 | 2.73 |
表6 指数经验方程实测值与拟合值的相对误差
Table 6 Relative errors between measured and fitted values of the exponential empirical equation
土层 Soil layer/cm | 压力 Pressure/Pa | 相对误差 Relative error/% | ||||||
---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | ||
0.0 | 1.27 | 0.02 | 14.05 | 7.35 | 4.07 | 1.14 | 4.85 | |
1.0×105 | 2.23 | 0.05 | 5.00 | 3.17 | 7.09 | 4.65 | 2.26 | |
0—20 | 3.0×105 | 3.63 | 1.08 | 3.33 | 0.03 | 3.35 | 7.69 | 6.60 |
5.0×105 | 7.37 | 0.13 | 6.18 | 6.89 | 6.26 | 13.15 | 6.03 | |
1.0×106 | 1.17 | 0.08 | 0.51 | 1.82 | 5.17 | 0.42 | 0.39 | |
1.5×106 | 3.50 | 0.65 | 8.31 | 7.50 | 11.52 | 18.39 | 6.00 | |
0.0 | 8.22 | 2.94 | 2.67 | 4.09 | 5.03 | 3.71 | 5.99 | |
1.0×105 | 3.58 | 9.17 | 3.53 | 6.24 | 6.38 | 3.22 | 2.51 | |
20—40 | 3.0×105 | 2.40 | 4.67 | 1.12 | 4.79 | 4.74 | 3.98 | 5.48 |
5.0×105 | 7.27 | 7.87 | 10.39 | 7.45 | 3.51 | 2.45 | 6.98 | |
1.0×106 | 5.37 | 1.09 | 0.44 | 2.01 | 3.01 | 2.26 | 5.03 | |
1.5×106 | 8.74 | 7.57 | 10.60 | 12.22 | 7.09 | 2.04 | 2.73 |
模型 Model | 土层 Soil layer/cm | 指标 Index | 处理 Treatment | ||||||
---|---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | |||
均方根误差RMSE | 0.004 2 | 0.001 8 | 0.004 5 | 0.005 1 | 0.009 5 | 0.006 7 | 0.008 7 | ||
0—20 | 绝对平均误差MAE | 0.003 5 | 0.001 1 | 0.003 4 | 0.003 9 | 0.008 1 | 0.006 1 | 0.007 1 | |
决定系数R2 | 0.997 0 | 0.997 6 | 0.998 1 | 0.995 6 | 0.990 7 | 0.996 8 | 0.995 6 | ||
Gardaner | 均方根误差RMSE | 0.007 3 | 0.008 6 | 0.011 3 | 0.004 0 | 0.008 8 | 0.009 6 | 0.011 0 | |
20—40 | 绝对平均误差MAE | 0.006 1 | 0.007 7 | 0.008 8 | 0.003 0 | 0.007 4 | 0.007 8 | 0.009 8 | |
决定系数R2 | 0.983 3 | 0.993 7 | 0.996 7 | 0.998 2 | 0.981 0 | 0.997 6 | 0.994 8 | ||
均方根误差RMSE | 0.007 1 | 0.003 9 | 0.007 0 | 0.005 5 | 0.005 3 | 0.013 4 | 0.017 8 | ||
0—20 | 绝对平均误差MAE | 0.004 5 | 0.002 8 | 0.005 6 | 0.004 4 | 0.003 5 | 0.008 1 | 0.014 5 | |
Rational | 决定系数R2 | 0.993 6 | 0.999 0 | 0.999 8 | 0.997 6 | 0.998 1 | 0.999 9 | 0.973 0 | |
均方根误差RMSE | 0.002 3 | 0.004 2 | 0.007 0 | 0.003 0 | 0.009 6 | 0.005 7 | 0.006 9 | ||
20—40 | 绝对平均误差MAE | 0.001 7 | 0.003 1 | 0.005 6 | 0.002 1 | 0.009 2 | 0.004 4 | 0.004 9 | |
决定系数R2 | 0.995 9 | 0.996 4 | 0.992 5 | 0.999 5 | 0.994 7 | 0.993 0 | 0.978 5 | ||
指数模型 Exponentialmodel | 均方根误差RMSE | 0.004 8 | 0.004 5 | 0.032 7 | 0.030 7 | 0.014 3 | 0.014 5 | 0.008 7 | |
0—20 | 绝对平均误差MAE | 0.004 2 | 0.002 8 | 0.022 8 | 0.021 9 | 0.013 1 | 0.013 2 | 0.007 6 | |
决定系数R2 | 0.989 5 | 0.953 2 | 0.973 7 | 0.981 2 | 0.981 7 | 0.953 7 | 0.986 3 | ||
均方根误差RMSE | 0.009 3 | 0.015 8 | 0.015 8 | 0.046 5 | 0.012 5 | 0.007 5 | 0.008 8 | ||
20—40 | 绝对平均误差MAE | 0.007 7 | 0.007 6 | 0.013 0 | 0.013 8 | 0.010 8 | 0.006 3 | 0.007 6 | |
决定系数R2 | 0.988 7 | 0.918 2 | 0.972 0 | 0.981 3 | 0.985 2 | 0.994 3 | 0.986 9 |
表7 3种模型方程拟合指标
Table 7 3 model equation fitting indicators
模型 Model | 土层 Soil layer/cm | 指标 Index | 处理 Treatment | ||||||
---|---|---|---|---|---|---|---|---|---|
CK | SO | SR | SCM | SM | HSR | SP | |||
均方根误差RMSE | 0.004 2 | 0.001 8 | 0.004 5 | 0.005 1 | 0.009 5 | 0.006 7 | 0.008 7 | ||
0—20 | 绝对平均误差MAE | 0.003 5 | 0.001 1 | 0.003 4 | 0.003 9 | 0.008 1 | 0.006 1 | 0.007 1 | |
决定系数R2 | 0.997 0 | 0.997 6 | 0.998 1 | 0.995 6 | 0.990 7 | 0.996 8 | 0.995 6 | ||
Gardaner | 均方根误差RMSE | 0.007 3 | 0.008 6 | 0.011 3 | 0.004 0 | 0.008 8 | 0.009 6 | 0.011 0 | |
20—40 | 绝对平均误差MAE | 0.006 1 | 0.007 7 | 0.008 8 | 0.003 0 | 0.007 4 | 0.007 8 | 0.009 8 | |
决定系数R2 | 0.983 3 | 0.993 7 | 0.996 7 | 0.998 2 | 0.981 0 | 0.997 6 | 0.994 8 | ||
均方根误差RMSE | 0.007 1 | 0.003 9 | 0.007 0 | 0.005 5 | 0.005 3 | 0.013 4 | 0.017 8 | ||
0—20 | 绝对平均误差MAE | 0.004 5 | 0.002 8 | 0.005 6 | 0.004 4 | 0.003 5 | 0.008 1 | 0.014 5 | |
Rational | 决定系数R2 | 0.993 6 | 0.999 0 | 0.999 8 | 0.997 6 | 0.998 1 | 0.999 9 | 0.973 0 | |
均方根误差RMSE | 0.002 3 | 0.004 2 | 0.007 0 | 0.003 0 | 0.009 6 | 0.005 7 | 0.006 9 | ||
20—40 | 绝对平均误差MAE | 0.001 7 | 0.003 1 | 0.005 6 | 0.002 1 | 0.009 2 | 0.004 4 | 0.004 9 | |
决定系数R2 | 0.995 9 | 0.996 4 | 0.992 5 | 0.999 5 | 0.994 7 | 0.993 0 | 0.978 5 | ||
指数模型 Exponentialmodel | 均方根误差RMSE | 0.004 8 | 0.004 5 | 0.032 7 | 0.030 7 | 0.014 3 | 0.014 5 | 0.008 7 | |
0—20 | 绝对平均误差MAE | 0.004 2 | 0.002 8 | 0.022 8 | 0.021 9 | 0.013 1 | 0.013 2 | 0.007 6 | |
决定系数R2 | 0.989 5 | 0.953 2 | 0.973 7 | 0.981 2 | 0.981 7 | 0.953 7 | 0.986 3 | ||
均方根误差RMSE | 0.009 3 | 0.015 8 | 0.015 8 | 0.046 5 | 0.012 5 | 0.007 5 | 0.008 8 | ||
20—40 | 绝对平均误差MAE | 0.007 7 | 0.007 6 | 0.013 0 | 0.013 8 | 0.010 8 | 0.006 3 | 0.007 6 | |
决定系数R2 | 0.988 7 | 0.918 2 | 0.972 0 | 0.981 3 | 0.985 2 | 0.994 3 | 0.986 9 |
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