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在阿克苏佳木试验站枣树果园进行了单点滴灌灌水方式12,16,20L/h滴头流量和4,6,8h滴水时间共9种灌水模式试验,采用土壤含水量连续监测系统(AV-EC5、EM50/R)监测并分析了土壤水分时空运移特征。结果表明,单点滴灌灌水方式下湿润体内土壤含水量的分布从中心向外逐渐减小,土壤水分按点源三维入渗方式运移,湿润层呈扇形剖面;供水停止后土壤水分再分布过程中,土壤湿润峰面不断向外部推移,湿润层土壤含水量开始有所增加,后期湿润体内的土壤含水量普遍降低,高含水区逐渐下移,最后达到相对稳定;滴头流量越大,灌溉时间越长湿润层能达到的深度越深,水平方向水分运移也越远;深层土壤水分持续增加时间也与滴头流量和灌溉时间成正比;试验地土壤水分水平运移速度比垂直运移速度快;当地枣树果园滴灌模式选择16L/h流量8h灌溉模式为宜。
A total of 9 irrigation patterns were tested in the jujube orchard of Aksu Jiamu Station with single drip irrigation, dripper flow rate of 12, 16, 20L / h and drip time of 4, 6, 8h respectively. The soil moisture content continuous monitoring system (AV -EC5, EM50 / R) to monitor and analyze the temporal and spatial characteristics of soil moisture. The results showed that the distribution of soil moisture content in wetting body decreased with the single drip irrigation. The soil moisture moved by point source three-dimensional infiltration, and the wetting layer showed fan-shaped section. After the water supply was stopped, the soil moisture redistribution process , The wetting peak surface of the soil continued to move to the outside, the soil moisture content of the wetting layer began to increase, the soil moisture content of the wetting body generally decreased later, and the high water-bearing area gradually moved down and finally reached a relatively stable condition. The greater the dripper flow rate, The longer the depth of wetting layer, the longer the horizontal depth of water transport, and the longer the duration of soil moisture increase is also proportional to the dripper flow rate and irrigation time. The soil moisture level of test site is faster than vertical migration Speed; local jujube orchard drip irrigation mode 16L / h 8h irrigation mode is appropriate.