摘要
在米脂山地微灌枣树示范基地进行原状土涌泉根灌入渗试验,研究了不同流量、不同灌水历时条件下涌泉根灌湿润体特征值的变化规律。结果表明:湿润体的水平扩散半径、向上入渗距离、向下入渗深度随流量的增大而增大,且均与入渗时间有显著的幂函数关系;在相同流量情况下,向上入渗最快,水平扩散次之,向下入渗最慢;湿润体体积受灌水量和流量的影响;在不同流量条件下,湿润体体积与灌水量间,湿润体水平扩散半径、垂直扩散距离与灌水量间均存在极显著的幂函数关系;针对五年生枣树根系分布特征,确定了枣树适宜灌水时间和灌水量。
Undisturbed soil surge root irrigation infiltration experiment was carried out at mountain micro-irrigation demonstration base for jujube at Mizhi,and the variation of eigenvalues of wetted soil is studied under the condition of different flows and diachronic. Results show that the horizontal diffusion radius,upward infiltration distance,downward infiltration depth all increase with flow increasing,and they all have a significant power function relationship with infiltration time;under the condition of the same flow,upward infiltration is the fastest,horizontal diffusion is in the second place,and downward infiltration is in the last place;wetted soil volume is influenced by irrigation amount and flow;under the condition of different flows,irrigation amount has a very significant power function relationship with wetted soil volume,wetted soil horizontal diffusion radius and vertical diffusion distance;under the condition of five flows and according to the root distribution characters of the jujube of five years,suitable irrigation time and irrigation amount are determined.
出处
《水土保持学报》
CSCD
北大核心
2009年第6期190-194,共5页
Journal of Soil and Water Conservation
基金
国家重大科技支撑项目(2007BAD88B05)
关键词
涌泉根灌
湿润体特征值
流量
灌水量
surge root irrigation
wetted soil eigenvalue
flow
irrigation amount
作者简介
黎朋红（1983-），男（汉族），湖北黄冈人，硕士生，主要从事节水灌溉新技术研究。E-mail：lph_712100@163．com
通讯作者：汪有科（1956-），男（汉族），研究员，主要从事节水灌溉方面的研究。E-mail：gjzwyk@vip．sina．com
