间歇入渗影响因素的大田试验研究

间歇灌是一种新的地面节水灌溉技术。本文以141组大田连续及间歇单点入渗试验资料为依据,针对陕西关中地区中壤质地土壤,分析了土壤初始含水量、土壤结构及灌水参数等因素对间歇入渗减渗效果的影响。结果表明,土壤初始含水量的大小主要影响入渗过程的初始阶段,对减渗效果影响甚微;随着表土容重增大,减渗率减小;灌水参数对减渗效果有不同程度的影响,其中循环率影响最大。

Test and Study on Influence Factors of Intermittent Infiltration of Farmlands

Intermittent irrigation is a new surface irrigation technology for saving water, The paper analyses the influence on the results of intermittent infiltration and infiltration reduction by the factors of initial soil moisture, soil structure and watering parameters based on 141 groups of farmland test data of continuous and intermittent single-point infiltration and in the light of middle loamy soil in Guanzhong region of Shaanxi Province. The results show that the degree of initial soil moisture influences mainly the initial stage of infiltration process, but a little influence to the results of infiltration reduction; infiltration reduction rate is getting smaller along with the increase of unit weight of surface soil; watering parameters have different effects on infiltration reduction results, among which, the effect on circulation ratio is the maximum.