日光温室长季节黄瓜的水分生产效率分析

Analysis of Water Use Efficiency of the Long-Growing-Period Cucumber in Solar Greenhouses

研究了不同灌水方式、不同温度和天气对日光温室长季节黄瓜水分生产效率的影响.结果表明:膜下滴灌和沟灌结合条件下的水分生产效率较沟灌的高,适温时段水分生产效率较低温时段的高,晴天多的时段的水分生产效率高于阴天多的时段;光照对水分生产效率的影响比温度大.通过对比研究,确定了滴灌+沟灌灌水方式的灌溉定额,发现适温时段的节水潜力大.

Effects of irrigation modes, temperature and weather on water use efficiency of the long-growing-period cucumber in solar greenhouses were studied. The main results were as follows： water use efficiency was higher under the condition of drip irrigation under plastic film in combination with furrow irrigation than under furrow irrigation alone, higher in the period of optimum temperature than in the period of low temperature, and higher in fine days than in more days; and light had greater effects on water use efficiency than temperature did. Comparative study established the proper irrigation quota for the mode of drip irrigation under plastic film in combination with furrow irrigation and showed that there was great water-saving potential in the period of optimum temperature.