| Universal model for water diffusivity in saline sandy loam soil with different particle sizes |
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| DOI：10.7606/j.issn.1000-7601.2019.01.23 |
| Key Words: different particle size water diffusion rate soil volumetric water content soil salt content |
| Author Name | Affiliation | | Gulaimubaier·Aierken | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | Hudan·Tumarbay | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | Mahmut·Ahmat | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| In order to determine the soil water diffusivity D(θ) for sandy loam soil with severe soil salinity, the indoor non-stable flow method with horizontal soil column was used to study the water diffusion rate and soil salinity of different size sandy loam soil under the film drip irrigation in the Shihezi 121 group irrigation area in Xinjiang. The results showed that the sandy soil with particle size of 1.0~2.0 mm had the greatest diffusion rate that changed rapidly followed by 0.5~1.0 mm sandy loam. The smallest diffusion rate was with soil particle size less than 0.5 mm in sandy loam. Decreasing soil particle size gradually decreased the soil water diffusivity while increasing soil salinity decreased the soil water diffusion rate. The universal model with the soil volumetric water content variation and the soil salinity as independent variables was more practical. Meanwhile, it closely reflected water diffusion rate change curve of saline sandy loam soil under the same bulk density and the same lateral distance but different particle size. |
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