| Cite this article: | 马合木江.艾合买提,虎胆.吐马尔白.滴灌棉田粉壤土不同容重条件下土壤水分特征曲线测定[J].灌溉排水学报,,():-. |
| mahemujiang·aihemaiti,hudan·tumaerbai.滴灌棉田粉壤土不同容重条件下土壤水分特征曲线测定[J].灌溉排水学报,,():-. |
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| DOI： |
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| Determination of soil water characteristic curve under different bulk density conditions of drip irrigation cotton field loam |
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mahemujiang·aihemaiti, hudan·tumaerbai
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College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University
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| Abstract: |
| In order to explore the influence of different weight-bearing plots on the soil water characteristic curve of the drip-irrigated cotton field in Shihezi Reclamation Area, Xinjiang, the soil moisture characteristic curves of three bulk-density soils were determined by the tensiometer method, and the vanGenuchten model was used for fitting and analysis. The results showed that the soil moisture characteristic curves of the soil moisture absorption and desorption processes of the bulk density soils were consistent with the vanGenuchten model. With the increase of bulk density, the dehumidification and moisture absorption process curves of silt loam showed a state of gradually moving upward. Under the same water content during dehumidification and moisture absorption in different bulk density soils, the soil water suction with a bulk density of 1.741g/cm3 has the highest hysteresis value in the moisture absorption and desorption process, the maximum hysteresis is present, and the water retention is the best. The bulk density is 1.631g/cm3. Secondly, the bulk density of 1.489g/cm3 is the smallest. It indicates that the bulk density is increased, the soil profile is easy to absorb water, water is difficult to lose, and the soil water retention performance is better; |
| Key words: Soil water characteristic curve; soil water content; soil water suction; specific water weight |
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