| 摘要: |
| 通过野外积水入渗试验，探讨了不同地貌（塬、坡、沟）和不同土地利用类型（大豆地、麦茬地、玉米地、刺槐地、油松林地等）对土壤入渗特性的影响，并采用3种入渗公式对不同地貌特征与不同土地利用条件下土壤入渗的变化规律进行了拟合。结果表明，塬面和阴坡上用考斯加可夫公式能较好地反映土壤入渗规律。前30 min的累积入渗量以塬面水平梯田大豆地最小，为32.061 mm；以塬面坡耕麦茬地最大，为230.488 mm。入渗速率以塬面麦荐地最大，为4.245 mm/min，以塬面水平梯田大霞地最小，为0.239 mm/min。不同坡向的入渗率均表现为阴坡大于阳坡。 |
| 关键词: 土壤入渗规律 地貌特征 土地利用类型 南小河沟流域 |
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| 基金项目:国家自然科学基金项目（50209016）；陕西省自然科学基金项目（2003D13）；陕西省教育厅重点实验室项目（04JS15）；西北农林科技大学高级访问学者项目 |
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| Research on soil infiltration of Nanxiaohegou basin in Gansu Xifeng |
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| Abstract: |
| Effect of landforms and land-use types on the variational law of the infiltration rate was analyzed through infield experiment,and the measured data were fitted by the three soil infiltration equations.Results show that Koctakob equation fits better in the plateau form and shady slope,the minimum value of the accumulated infiltration initial 30 min appears in the soybean filed of bench terrace and the maximum value in the wheat by reaped field of hillside cultivated;the maximum value of infiltration rate appears in the wheat by reaped field of hillside cultivated and the minimum value in the soybean field;infiltration rate in the shady slope is greater than that in the sunny slope. |
| Key words: soil infiltration law feature of landform land-use type Nanxiaohegou basin |
