雨强和地下孔（裂）隙度对喀斯特坡耕地养分流失的影响
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姚一文,戴全厚,甘艺贤,高儒学,严友进,王玉红
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Effects of Rainfall Intensity and Underground Hole (Fracture) Gap on Nutrient Loss in Karst Sloping Farmland
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YAO YiWen,DAI QuanHou,GAN YiXian,GAO RuXue,YAN YouJin,WANG YuHong
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表5 不同雨强下地表、地下泥沙养分流失状况
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Table 5 Loss of nutrients with surface and underground sediment relative to rainfall intensity
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养分
Nutrient | 降雨强度
Rainfall
intensity
(mm·h-1) | 地表泥沙Surface sediment | 地下泥沙Underground sediment | 地下流失比
Underground loss ratio
(%) | 平均流失浓度
Average loss
concentration
(mg·L-1) | 流失量
Total loss
(mg) | 养分流失模数
Nutrient loss modulus
(mg·m-2·h-1) | 平均流失浓度
Average loss
concentration
(mg·L-1) | 流失量
Total loss
(mg) | 养分流失模数
Nutrient loss modulus
(mg·m-2·h-1) | 全氮
TN
| 30 | 0.00 | 0.00 | 0.00 | 1.21c | 0.59c | 0.20 | 100.00 | | 50 | 1.26c | 4.12b | 1.42 | 1.41b | 0.90b | 0.31 | 17.85 | | 70 | 1.48b | 7.46a | 2.58 | 1.42b | 1.10b | 0.38 | 12.83 | | 90 | 1.66a | 7.48a | 2.58 | 1.72a | 1.22a | 0.42 | 14.05 | 全磷
TP
| 30 | 0.00 | 0.00 | 0.00 | 1.83a | 0.89b | 0.31 | 100.00 | | 50 | 1.59b | 5.38c | 1.86 | 1.64b | 1.05a | 0.36 | 16.32 | | 70 | 1.69ab | 7.94b | 2.74 | 1.63b | 1.29a | 0.45 | 13.97 | | 90 | 1.72a | 8.37a | 2.89 | 1.62b | 1.16a | 0.47 | 12.20 | 全钾
TK | 30 | 0.00 | 0.00 | 0.00 | 8.04a | 3.81d | 1.32 | 100.00 | | 50 | 8.70c | 28.62b | 9.88 | 7.82a | 4.87c | 1.68 | 14.55 | | 70 | 9.13b | 43.17a | 14.90 | 8.11a | 6.25a | 2.16 | 12.65 | | 90 | 9.37a | 45.34a | 15.65 | 7.75a | 5.38b | 1.86 | 10.61 |
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