| Cite this article: | 马瑞莎,乔长录,葛瑞晨.膜下滴灌棉田凝结水量研究[J].灌溉排水学报,0,():-. |
| Ma Rui-sha,Qiao Chang-lu,Ge Rui-chen.膜下滴灌棉田凝结水量研究[J].灌溉排水学报,0,():-. |
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| Study of dew in cotton field under drip irrigation |
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Ma Rui-sha, Qiao Chang-lu, Ge Rui-chen
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School of Water Conservancy and Architectural Engineering,Shihezi University,Xinjiang
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| Abstract: |
| Using the water-saving irrigation station of Shihezi University in 2019, the lysimeter, weather station, and EM50 were used to measure and experiment on the dew of cotton fields, and comprehensively analyze then obtained data. The typical days of different growth periods were selected to discuss the condensation process of drip irrigation cotton field during the whole growth period, the amount of dew in different growth periods, the influence of different treatment methods on the dew amount, and the significance of dew on cotton fields in arid areas. The results show that the condensation process of water vapor starts after 0:00 Beijing time and ends at 8:00 the next day, which lasts for 8 hours. During the night shift, condensation and evapotranspiration alternately proceed. The condensation process of water vapor can be divided into three stages: slow condensation, rapid condensation, and conversion to evapotranspiration. The daily condensation rate of dew in different growth periods reached the maximum between 1:00-3:00, and then gradually decreased. The coagulation process of cotton field condensate water mainly occurs at night, and the condensation and evapotranspiration are all in the four different growth stages: blooming and boll stage> bud stage> fluffing stage> seedling stage. The amount of condensed water under the uncoated condition is 25.86% higher than that under the filmed condition. The two methods of film-coated and uncoated will not affect the dynamic change law of water vapor condensation. The non-coated condition is more conducive to the generation of condensation. Conditions are not conducive to dew entering the soil. |
| Key words: Dew; Drip irrigation under mulch; arid areas; Manas river basin |
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