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Shihezi University (石河子大学) 2021

Estimation and Influencing Factors of Dew in Cotton Field under Mulch Drip Irrigation in Arid Area

马瑞莎

Titre : Estimation and Influencing Factors of Dew in Cotton Field under Mulch Drip Irrigation in Arid Area

Auteur : 马瑞莎

Grade : Master 2021

Université : Shihezi University (石河子大学)

Résumé partiel
Dew is an important part of water resources besides precipitation in arid and semi-arid regions.This‘non-precipitation’water is of great significance to the ecosystem and water balance.Observation method of domestic and foreign scholars have been from the condensate and water flow measurement,duration,influencing factors and ecological function has carried on the extensive research,but less on the study of film drip irrigation cotton under water,condensate drip irrigation cotton under estimate model is suitable for the membrane are not sure,the influence factors of membrane drip irrigation cotton under the condensate still remains unclear.Shihezi university according to the above problem,this study intends to rely on water saving irrigation experimental station under the condition of different irrigation time,dynamic changes of the condensate,influence factors were analyzed,and the building is suitable for the membrane condensate drip irrigation cotton under estimate model,discusses the condensate of drip irrigation under membrane of northern Xinjiang cotton growth,which will provide a scientific basis for the sustainable development of the film with drip irrigation.The following conclusions were obtained :(1)Condensation began at 00:00 and ended at 08:00 every day for 8 h.Condensation and evapotranspiration alternated in cotton field under drip irrigation under film,which could be divided into three processes:slow condensation,rapid condensation and conversion to evapotranspiration.For different time scales,the amount of condensation at 12 h scale were as follows:blooming and boll stage>buding stage>boll opening stage>seedling stage.On the scale of the whole growth period,the amount of condensation at flowering and boll stage was the most,while that at floc opening stage was the least.The other growth stages had different results due to rainfall,weather conditions and local temperature changes.For different conditions of film mulching,the amount of condensation under no film mulching condition is higher than that under film mulching condition,and the film mulching condition is not conducive to the condensation water into the soil

Mots clés : Dew ;Drip irrigation under mulch film ;arid areas ;evapotranspiration;Manas river basin ;

Présentation (CNKI)

Page publiée le 22 février 2022