| Effect of pressure heads and soil bulk density on water infiltration under moistube irrigation |
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| DOI：10.7606/j.issn.1000-7601.2017.04.11 |
| Key Words: moistube irrigation pressure heads soil bulk density water infiltration |
| Author Name | Affiliation | | ZHANG Guo-xiang | College of Water Conservancy and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China | | SHEN Li-xia | College of Water Conservancy and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China | | GUO Yun-mei | College of Water Conservancy and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China |
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| Abstract: |
| In order to investigate the relationship between water's infiltration and different pressure heads and bulk density under moistube irrigation, treatmenst of three pressure heads (2.0、1.5、1.0 m) and three bulk density (1.20, 1.30,1.40 g·cm-3) were conducted by soil culture experiments. Three indicators, accumulative infiltration, wetting front and soil water content were measured. The result revealed that the accumulative infiltration of water was positively related with pressure heads, but negatively with soil bulk density. The discharge of moistube was linearly related with pressure heads under air and burying. The wetting front was an approximate circle with a moistube centre. The horizontal movement distance and the vertical upward movement distance were larger than the vertical downward movement, and gravity had certain effect on water movement under moistube irrigation. However, the effect was weaker and weaker with the increasing soil bulk density. |
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