排灌机械工程学报2011，Vol.29Issue(3)：260-265,6.DOI:10.3969/j.issn.1674-8530.2011.03.016
涌泉根灌土壤湿润体特性试验
Characteristics test of wetting body of surge and spring root irrigation
摘要
Abstract
In order to further research the characteristics variation of wetting body in surge and spring root irrigation, the surge spring and root irrigation with different dripper discharge were conducted in undisturbed soil in Jujube demonstration base with mountain micro-irrigation in Mizhi. The results showed that the horizontal diffusion radius, the upward infiltration distance and the downward infiltration depth were in direct proportional to the dripper discharge, and also conformed to power function with infiltration time with related coefficients which are beyond 0.97. Study also proposed a formula which is used to calculate the migration distance of the wetting front. The results showed that the relative errors between predicted value and measured date of the migration distance of the wetting front were lower than 5％. The formula which was used to calculate the average moisture content in surge and spring root irrigation was set up. The results also showed that the relative errors between the predicted values and measured data of the average moisture content after irrigation were lower than 8％. According to the actual needs of farmland irrigation, with the assumption that the planned moisture layer in soil equals to the depth of vertical infiltration in surge and spring root irrigation process, the equations were proposed which is used to calculate the horizontal diffusion radius according to the plan wet layer depth, and the equations were validated in field. The results show that the relative error between predicted values of the horizontal diffusion radius and measured ones are lower than 10％.关键词
涌泉根灌/湿润锋运移/水分分布/湿润体特性/土壤含水量Key words
surge and spring root irrigation /wetting front transport/moisture distribution/characteristics value of wetting body/moisture of soil分类
农业科技引用本文复制引用
费良军,曹俊,聂卫波..涌泉根灌土壤湿润体特性试验[J].排灌机械工程学报,2011,29(3):260-265,6.基金项目
"十一五"困家科技支撑计划重大项目(2007BAD88B05) （2007BAD88B05）
陕西省重点实验室科研计划项目(08JZ51) （08JZ51）
