单膜孔点源肥液入渗水氮分布特性试验研究  

Water and NO_3^--N distribution characteristics in single film hole point source fertile solution infiltration

作　　者：费良军[1] 程东娟[1] 朱兴华[1] 

机构地区：[1]西安理工大学水资源研究所,西安710048

出　　处：《农业工程学报》2006年第10期12-15,共4页Transactions of the Chinese Society of Agricultural Engineering

基　　金：陕西省重点实验室重点科研项目(03JS041);国家自然科学基金项目(50579064);西北农林科技大学旱区农业水土工程教育部重点实验室访问学者基金项目;陕西省教育厅科研计划项目(03JK153)

摘　　要：该文通过室内试验,研究了膜孔灌肥液单点源自由入渗湿润体内水分和NO3--N浓度的分布特性,提出了膜孔肥液自由入渗湿润体内水分和NO3--N浓度分布的数学模型。研究结果表明:水分和NO3--N浓度分布模型计算精度较高,并符合点源湿润体内土壤含水率和NO3--N的分布规律;根据湿润体内水分和NO3--N浓度分布模型,推求得到了湿润体中土壤含水率、NO3--N浓度和湿润半径三者之间的关系。以上成果为进一步研究膜孔肥液入渗的影响因素和灌水技术提供了理论基础。Based on the indoor experiment of single film hole point source fertile solution infiltration, the distribution characteristics of water content and NO3^--N concentration in wetted-body were researched. The mathematic models of water content and NO3^--N concentration distribution were put forward. Results show that the accuracy of these models is high and the models are consistent with the law of the water content and NO3^--N concentration distribution. According to water content and NO3^--N concentration distribution models, the relationships among water content, the concentration of NO3^--N and radius of wetted-body are ascertained. These researches have laid a foundation for further study of the influence factors in film hole fertile solution infiltration.

关 键 词：肥液 单膜孔点源入渗 水氮分布 数学模型 

分 类 号：S143.1[农业科学—肥料学]