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6 不同地下孔（裂）隙度地表、地下泥沙养分流失状况
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Table 6 Loss of nutrients with surface and underground sediment relative to underground fissure porosity
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养分
Nutrient | 孔(裂)隙度
Fissure porosity
(%) | 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 | 1 | 1.53a | 7.48a | 2.58 | 1.76a | 1.22b | 0.42 | 14.03 | | 3 | 1.16b | 4.82b | 1.66 | 1.44b | 1.65b | 0.57 | 25.49 | | 5 | 1.47a | 3.96c | 1.37 | 0.85c | 2.92a | 1.01 | 42.42 | 全磷
TP | 1 | 1.68b | 8.37a | 2.89 | 1.67b | 1.16c | 0.40 | 12.17 | | 3 | 2.04a | 8.31a | 2.86 | 1.75ab | 2.02b | 0.70 | 19.58 | | 5 | 1.74b | 4.97b | 1.71 | 1.78a | 6.10a | 2.11 | 55.12 | 全钾
TK | 1 | 9.18a | 45.34a | 15.65 | 7.72a | 5.38c | 1.86 | 10.61 | | 3 | 8.70b | 36.21b | 12.50 | 7.37a | 8.50b | 2.93 | 19.01 | | 5 | 9.07a | 25.34c | 8.75 | 7.58a | 26.02a | 8.98 | 50.66 |
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