灌水频率对地下滴灌线源入渗土壤水分运动规律影响的试验研究

Study on effects of irrigation frequency on soil water-transport of line source permeation under subsurface drip irrigation

本文通过室内试验,分析了不同灌水频率对地下滴灌线源入渗土壤水分运动规律的影响,认为在相同灌水量条件下,间隔时间越长,土壤水分含量在湿润体内的分布梯度差相对较小,而间隔时间越短,在滴头附近含水率越高,向周围递减的梯度越大。分3次完成灌水量且两次间隔时间12h的试验,在滴头周围含水率较高。

The effects of irrigation frequency on soil water-transport of line source permeation under subsurface drip irrigation(SDI) is analyzed by indoor experiment,The difference of the distribute of soil moisture is not big when the longer interval under the condition of same amount of water,the difference of the distribute of soil moisture is bigger when the shorter interval,and the water content is higher.The moisture content in the emitter nearby is higher when the same amount of water is divided to 3 times an...