2种滴灌带灌水均匀度对铺设长度和进水压力的响应  

Responses of Irrigation Uniformity of Two Types of Drip Irrigation Belts to Inlet Pressure and Laying Length

作　　者：席奇亮 葛国锋 周方 邢雪霞[1] 赵科[1] 卫宣志 薛刚[1] 杨铁钊[1] 

机构地区：[1]河南农业大学烟草学院,郑州450002 [2]河南省洛阳市烟草公司,河南洛阳471000

出　　处：《灌溉排水学报》2018年第3期78-83,共6页Journal of Irrigation and Drainage

基　　金：河南省烟草公司科技攻关项目(HYKJZD201401);河南省烟草公司洛阳市公司科技项目(LYKJ201401)

摘　　要：【目的】探究滴灌带进水压力和铺设长度对灌水均匀度的影响。【方法】以内嵌式滴灌带和薄壁式滴灌带为研究对象,比较了4种滴灌带铺设长度和4种进水压力交互作用下的灌水均匀度。【结果】内嵌式滴灌带的灌水均匀度较薄壁式滴灌带表现更好,且更适合于较长距离铺设使用。建立了2种滴灌带灌水均匀度与滴灌带铺设长度和进水压力的数学回归模型,并利用回归方程寻优发现内嵌式滴灌带滴灌均匀度达到0.95以上的优化铺设长度和进水压力的组合为:铺设长度60.02~109.94 m,进水压力0.09~0.2 MPa;薄壁式滴灌带的优化铺设长度和进水压力的组合为:铺设长度60.05~92.67 m,进水压力0.05~0.2 MPa。【结论】在设计田间滴灌系统时2种滴灌带的铺设长度和进水压力应在上述范围内选取,以保证灌水均匀度满足要求。[Objective] Investigate the influence of inlet pressure and laying length on the drip irrigation uniformity. [Method] The embedded drip irrigation belt and the thin-wall drip irrigation belt were used as the research objects, and the uniformity of drip irrigation under 4 kinds of inlet water pressure and 4 kinds of laying length was compared. [Result] The uniformity of drip irrigation of embedded drip irrigation was better than thin-wall drip irrigation, and the embedded drip irrigation was suitable for long distance. The mathematical models of the rela- tionship between the irrigation uniformity and the laying length and the inlet water pressure of the two types of drip irrigation belts were established. The optimal combination of the laying length and the inlet water pressure whose irrigation uniformity was more than 0.95 was found by using the optimization of the regression equation that the laying length of embedded drip irrigation belt was 60.02～ 109.94 m, and inlet water pressure was 0.09～0.20 MPa; The laying length of thin-wall drip irrigation belt was 60.05～92.67 m, and inlet water pressure was 0.05～0.20 MPa. [Conclusion] Therefore, when designing the field drip irrigation system, the laying length and the inlet water pressure of the two types of drip irrigation belts should be selected in the above range to ensure the uniformity of irrigation.

关 键 词：滴灌 铺设长度 进水压力 滴灌均匀度 

分 类 号：S275.6[农业科学—农业水土工程]