滞后连续滴水的自动化三管对北疆棉田湿润体盐分的影响  

Effect of Automatic Three-pipe Lagging Continuous Dripping on Moisture Body Salt in Cotton Field in Northern Xinjiang

作　　者：阿依波尔·达吾列提开来得 董文明[1] 叶尔古丽·奴尔沙哈提 穆哈西[1] A Yiboer·Da Wulietikailaide;Dong Wenming;E Erguli·Nu Ershahati;Mu Haxi(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University/Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention.,Urumqi,Xinjiang 830052,China)

机构地区：[1]新疆农业大学水利与土木工程学院/新疆水利工程安全与水灾害防治重点实验室,新疆乌鲁木齐830052

出　　处：《棉花科学》2022年第3期35-42,共8页Cotton Sciences

基　　金：国家自然科学基金项目“多环追压非等灌对盐碱地药用植物生理指标的影响机理及压盐用水定额研究”(3226130187);横向项目“新疆耕地质量调查研究分析及治理对策研究”(6660939-2519HXKT1)。

摘　　要：在滴灌条件下土壤的盐分积累在湿润锋边缘,作物根系发育范围内的盐分无法淋洗,为了扩大湿润体脱盐范围特提出一种节水淋洗根系范围内盐分的新技术。通过将现有的滴灌改为滞后连续滴水的自动化三管装置,采用该装置淋洗作物根系发育范围内的盐分,揭示其湿润体内盐分的降低量(该装置的中心管2小时滴水后,所产生湿润体脱盐边界线内的两侧各安装一条毛管,采用滞后连续滴水的方法把根系发育范围内的盐分往外追压,从而扩大湿润体的脱盐范围)。结果表明:采用三管滞后连续滴水4次后,土壤平均初始含盐量(10.53 g/kg)降到5.18 g/kg,不同深度盐分的降低量不仅跟灌水次数有关,而且跟不同深度土壤容重及易溶盐的多少也有关系。The soil salt accumulated at the edge of the wetting front, and the salt in the range of crop root development could not be leached under the condition of drip irrigation. A new technology of water-saving leaching of salt in the range of root development was proposed for expand the desalination range of wet body. By the existing drip irrigation is changed into an automatic three pipe device that lags behind continuous drip. The device is used to wash the salt within the development range of the crop root system, revealing the reduced amount of salt in the wet body(After the central pipe of the device drips water for 2 h, a capillary is installed on both sides of the desalting boundary line of the generated wetting body, and the method of lagging continuous dripping is used to push the salt in the root development range outward, so as to expand the desalting range of the wetting body). The results showed that the average initial salt content of soil decreased from 10.53 g/kg to 5.18 g/kg after four times of continuous drip with three pipes. The reduction of salt at different depths is not only related to the number of irrigation, but also related to the soil bulk density and the amount of soluble salt at different depths.

关 键 词：滞后连续滴水 自动化 三管 北疆棉田 湿润体盐分 降低量 

分 类 号：S562[农业科学—作物学]