日光温室供水系统灌溉水水温变化特性的研究

An Experimental Study on Irrigation Water Temperature Change Characteristics of Greenhouse Water Supply System

为了研究越冬期日光温室供水系统中灌溉水水温的变化特性,以黄土高原离石区设施蔬菜示范基地日光温室群的越冬期跟踪监测数据为依据,研究了灌溉水从水源地到日光温室入水口处的水温变化特性。结果表明:(1)从河流到潜水井,温度升高;从潜水井到蓄水池,水温大于管道埋深处地温时,水温降低,水温小于管道埋深处地温时,水温升高;从蓄水池到日光温室,水温降低,整个越冬期内日光温室进水口温度在5.2~8.2℃之间。(2)根据越冬期日光温室灌溉水水温的时空变化规律,提出了包括设计、建材、建造等方面的灌溉水升温保温措施。研究结果可为北方高寒地区越冬期温室大棚的灌溉水温管理提供具有实际意义的技术支撑,对丰富灌溉理论与技术具有一定的科学价值。

In order to study the irrigation water change characteristics of greenhouse water supply system during wintering period,the irrigation water temperature change characteristics from water source to greenhouse inlet are analyzed based on the tracking test data of greenhouse group in Xinyi Town,Lishi District,Shanxi Province in wintering period. The results show that：①In the process of gravity flow in the pipeline,the irrigation water releases heat and the temperature will reduce when the water temperature is greater than the soil temperature in the depth of pipe; on the other hand,the water absorbs heat from the surrounding soil and the water temperature will increase.In the process of gravity flow in the distribution pipe from the reservoir to the heating-up reservoir,irrigation water releases heat to the surrounding environment and the temperature will decrease. Throughout the wintering period,the irrigation water temperature is between 5.2 to 8.2 ℃;② According to the temporal and spatial variation of greenhouse irrigation water temperature during wintering period,some measures are put forward,including the design,materials,construction and so on. The results can provide practical technical support for the management of greenhouse irrigation water temperature of the seasonal frozen soil during the wintering period. It also has certain scientific value for enriching irrigation theory and technology.