Zuo Feng, Wangcheng Li, Jinshan Li, Fan Yong-shen, Feng Junjie
Abstract
地下滴灌与地表滴灌的最大差异在于地下滴灌的灌水器出水口被土壤包围,其出流受到土壤的限制.在室内将灌水器埋入土槽中,模拟研究了灌水器类型、自由出流时的流量、工作压力、土壤初始含水率等因素,对地下滴灌条件下灌水器水力性能的影响.试验结果表明:灌水器埋入土壤后,流量是其自由出流时流量的1/2～1/4.方差分析表明,影响地下滴灌灌水器水力性能的主要因素是自由出流时的水力特性和土壤特性.针对测试土壤,建立了地下滴灌灌水器流量计算的修正关系式.
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地下滴灌与地表滴灌的最大差异在于地下滴灌的灌水器出水口被土壤包围,其出流受到土壤的限制.在室内将灌水器埋入土槽中,模拟研究了灌水器类型、自由出流时的流量、工作压力、土壤初始含水率等因素,对地下滴灌条件下灌水器水力性能的影响.试验结果表明:灌水器埋入土壤后,流量是其自由出流时流量的1/2～1/4.方差分析表明,影响地下滴灌灌水器水力性能的主要因素是自由出流时的水力特性和土壤特性.针对测试土壤,建立了地下滴灌灌水器流量计算的修正关系式.
Key concepts: Drip irrigation, Environmental science, Common emitter, Irrigation, Hydrology (agriculture), Low-flow irrigation systems, Environmental engineering, Agronomy