摘要
为了研究相同灌水量条件下,不同灌水流量对涌泉灌及涌泉根灌湿润体的影响,以及二者的不同之处,进行了室内土壤水分入渗试验和理论分析。结果表明:入渗结束后,涌泉灌的湿润体形状是一个近似半球体,涌泉根灌的湿润体形状是一个近似半椭圆球体;灌水流量对涌泉灌湿润体的形状有显著的影响,流量越大,湿润体形状越扁平,但在一定流量范围内,灌水流量对涌泉根灌的湿润体形状无显著影响;在相同的灌水量和灌水流量条件下,涌泉灌在水平方向的入渗距离显著大于涌泉根灌,在垂直方向上的入渗距离显著小于涌泉根灌;相对于涌泉灌,涌泉根灌不易产生土壤表面积水,水分分布更深,入渗的水量更容易到达作物根区,减少了水分的无效蒸发,有利于作物对土壤水分的吸收。
In order to study the effect of different irrigation flow rate on the wetting body of bubbled irrigation and bubbled-root irrigation under the same irrigation amount,the indoor soil water infiltration experiment and theoretical analysis were carried out.The results show that the wetting body shape of bubbled irrigation is an approximate hemispherical body,and the wetting body shape of bubbled-root irrigation is an approximate half elliptical sphere after infiltration.The flow rate of emitter has a significant effect on the shape of wetting body of bubbled irrigation.The larger the flow rate is,the flatter the shape of wetting body is.However,within a certain range of flow rate,the flow rate of emitter has no significant effect on the shape of wetting body of bubbled-root irrigation.Under the same irrigation amount and flow rate,the infiltration distance of bubbled irrigation in the horizontal direction is significantly larger than that of bubbled-root irrigation,and the infiltration distance in the vertical direction is significantly smaller than that of bubbled-root irrigation.Compared with bubbled irrigation,bubbled-root irrigation is not easy to produce soil surface water accumulation,water distribution is deeper,the amount of infiltration water is easier to reach the root zone of crops,which reduces the ineffective evaporation of water and is benefit to the attraction of crops to soil moisture.
作者
赵新宇
胡羊羊
彭江涌
朱绿丹
ZHAO Xin-yu;HU Yang-yang;PENG Jiang-yong;ZHU Lü-dan(Nanchang Institute of Technology,Nanchang 330099,China;National and Provincial Joint Engineering Laboratory for the Hydraulic Engineering Safety and Efficient Utilization of Water Resources of Poyang Lake Basin,Nanchang 330099,China)
出处
《节水灌溉》
北大核心
2021年第11期71-73,82,共4页
Water Saving Irrigation
基金
国家自然科学基金资助项目(52069016)
江西省自然科学基金项目(20202BABL204068)
江西省水利科技项目(201921YBKT19)。
关键词
灌水流量
涌泉灌
涌泉根灌
湿润体
irrigation flow rate
bubbled irrigation
bubbled-root irrigation
wetting body
作者简介
赵新宇(1974-),男,副教授,主要从事节水灌溉研究。E-mail:spxyz@nit.edu.cn。
