大棚水果黄瓜需水量试验研究

为了检验E601蒸发皿法和质量法的适用性及基于环境参数的大棚水果黄瓜的需水量模型,通过田间试验采用时域反射仪(TDR)法、E601蒸发皿法和质量法3种不同的方式测定大棚水果黄瓜需水量,并且同步监测大棚内外的环境参数.对比时域反射仪(TDR)法、E601蒸发皿法和质量法测定的大棚水果黄瓜需水量,以TDR值为准进行精度分析,E601法的中误差为0.91 mm,质量法的中误差为0.94 mm;分析TDR值与同步监测的大棚内温度值的相关性,建立室温需水量模型和地温需水量模型,其中误差分别为0.35 mm、0.71 mm.研究成果对大棚水果黄瓜需水量计算以及灌溉管理和灌溉系统设计有一定的参考作用.

Experimental research on greenhouse fruit cucumber water requirement

An experiment which uses three methods to survey and evaluate the water requirement of fruit cucumber in greenhouse,has been carried out.By time domain reflectometry(TDR) measurements as standards,the measurement errors of the E601 pan measuring and quality measurement come out at 0.91 mm and 0.94 mm respectively.After test data analysis,two kinds of greenhouse fruit cucumber water requirement models are built.The standard deviation of the greenhouse temperature model is 0.71 mm;the standard deviation of the soil temperature model is 0.35 mm.The conclusions have some useful reference for greenhouse fruit cucumber irrigation management and irrigation system design.