| Effects of soil texture, bulk density and moisture content on soil air permeability |
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| DOI：10.7606/j.issn.1000-7601.2013.02.22 |
| Key Words: soil air permeability bulk density moisture content frozen |
| Author Name | Affiliation | | ZHU Min | Academy of Geography and Planing, Ludong University, Yantai Shandong, 264025, China | | ZHANG Zhenhua | Academy of Geography and Planing, Ludong University, Yantai Shandong, 264025, China | | PAN Yinghua | Academy of Geography and Planing, Ludong University, Yantai Shandong, 264025, China | | GUO Daofang | The Muping Branch of Yantai Land and Resources Bureau, Yantai Shandong, 264100, China | | LI Lusheng | Academy of Geography and Planing, Ludong University, Yantai Shandong, 264025, China | | SUN Yunpeng | Academy of Geography and Planing, Ludong University, Yantai Shandong, 264025, China |
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| Abstract: |
| In laboratory, air permeability of reload brunisolic soil, lou soil, loessal soil and saline alkali soil are measured by the one-dimensional transient method, soil bulk density, moisture content, frozen and other factors’ quantitative impact on the air permeability are analyzed, which are to make clear the relationship among the soil type, bulk density, moisture content, frozen and soil air permeability. Experimental results show that: soil texture and structure have a significant effect on the rate of air conductivity, in the same bulk density conditions, the air permeability of lou soil is close to that of brunisolic soil, and the air permeability of the two kinds of soil above are significantly higher than that of loessal soil. Saline-alkali soil air permeability are the lowest in the four bulk density, only 3% to 4% of the rate of lou soil and brunisolic soil; The air permeability of the four kinds of soil decreases with the increase of bulk density, the air permeability in maximum bulk density (1.5 g·cm-3) decreases by 75% to 85% compared to the minimum bulk density (1.2 g·cm-3) of the same kind of soil, and there is a significant exponential relationship between air permeability and bulk density; With other factors in the same conditions, the soil air permeability decreases with the increase of moisture content, there is also a significant exponential relationship between air permeability and moisture content; The frozen soil air permeability is much lower than that before freezing, the air permeability declines more significant in lower moisture content under given experimental conditions. |
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