滴灌土壤湿润体含水率分布规律的试验研究

Experimental Study on Distribution Rule of Soil Moisture in Wetting Front under Drip Irrigation

通过室内滴灌试验,研究了不同滴头流量对土壤湿润体变化过程的影响。试验所用的土壤为杨凌塿土,滴头流量分别为0.08、0.16、0.24、0.40、0.60、1.20、2.003、.60 L/h。结果表明,从0.08～0.6 L/h的滴头流量,其湿润体体积和灌水量之间存在显著的线性关系,说明平均含水率是一定值;从1.2～3.6 L/h的滴头流量,其湿润体体积和灌水量之间存在显著的幂函数关系,说明平均含水率是逐渐增大的。

Through drip irrigation laboratory experiments,different dripper discharge on the soil wetting front were analyzed.The experimental soils was Yangling Lou soil,while the experimental dripper discharges were 0.08,0.16,0.24,0.40,0.60,1.20,2.00,3.60 L/h,respectively.The results indicate that the dripper discharges from 0.08～0.6 L/h,the volume of wetted solum did not vary much with the dripping rate,description the average soil moisture was constant value.The dripper discharges from 1.2～3.6 L/h,the volume of wetted solum was vary much with the dripping rate,description the average soil moisture was increasing gradually.Through analysis,the dripper discharges was 0.65 L/h express the average soil moisture from content to increase.