| 赵颖娜,汪有科,马理辉,黎朋红,段雪松,张陆军.不同流量对滴灌土壤湿润体特征的影响[J].干旱地区农业研究,2010,28(4):30~35 |
| 不同流量对滴灌土壤湿润体特征的影响 |
| Study on effects of different dripper discharge on wetting soil characteristic of drip irrigation |
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| DOI：10.7606/j.issn.1000-7601.2010.04.06 |
| 中文关键词: 滴灌 湿润体特征值 流量 灌水量 |
| 英文关键词:drip irrigation characteristic value of wetted volume dripper discharge irrigation amount |
| 基金项目:国家科技支撑计划项目“陕西半干旱区山地特色果品综合节水技术研究与示范”(2007BAD88B05) |
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| 中文摘要: |
| 在米脂山地微灌枣树示范基地进行原状土的滴灌入渗试验,研究了不同流量、不同灌水历时条件下,地表滴灌湿润体特征值的变化规律及滴灌结束时的水分分布规律。结果表明:湿润体的水平和垂直扩散距离均与时间有显著的幂函数关系,相关系数均大于0.99;湿润体的体积及湿润体内土壤含水率的分布同时受滴头流量和灌水量的控制,相同灌水量情况下,湿润体体积随滴头流量的增加而变小,平均含水率变大;并且建立了预测湿润体特征值和湿润体体积的经验模型。 |
| 英文摘要: |
| The experiment was conducted to investigate the effect of different dripper discharge and irrigation amount
on the characteristic value of soil wetted volume and the course of soil water distribution with drip irigation in Jujube
demonstration base of mountain micro-irrigation in Mizhi. The results show that horizontal and vertical advance distance of soil wetted front conforms to power function of infiltration time for point source drip irrigation and calculated value is all above 0. 99; the soil wetted volume and the distribution of soil water content in wetted soil controlled by dripper discharge and irrigation amount. The soil wetted volume reduced and average moisture content increase with dripper discharge in-crease under same irrigation amount . Some models were presented to predict horizontal and vertical wetting front and volume of wetted soil. |
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