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首页> 外文会议>International Horticultural Congress >Use of Short Duration Partial Root Drying (PRD) in Soilless Grown Cucumber by 35 Deficit Irrigation
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Use of Short Duration Partial Root Drying (PRD) in Soilless Grown Cucumber by 35 Deficit Irrigation

机译：在贫瘠的黄瓜中使用短持续时间的偏生干燥（PRD）35％缺陷灌溉

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The experiment was carried out in order to investigate PRD (Partial Rootzone Drying) technique on soilless grown greenhouse cucumber. Four irrigation treatments have been realized: (1) Full-open, (2) Full-closed, (3) PRD-open and (4) PRD-closed. Under full irrigation treatments (Full-open and Full-closed), all roots were wetted in every irrigation with the applied amount of nutrient solution using one line of drip irrigation. The treatments of PRD system received 35% reduced nutrient solution compared to full irrigation treatments. In the open systems (Full-open and PRD-open), the excess nutrient solution was discharged as drainage from the greenhouse. In the closed systems (Full-closed and PRD-closed), drainage effluent from the base of the growth containers was collected and recycled in the system. Effects of the treatments on plant vegetative growth such as height, number of leaf and stem diameter were not significant. However, leaf weight, total biomass weight, leaf area and total yield were significantly affected by the treatments. The total yield in the experiment ranked as Full-open, PRD-open, Full-close, and PRD-close with 21.78, 21.25, 19.48 and 17.12 kg m~(-2), respectively. The fruit properties such as weight, diameter, volume and water soluble dry matter, EC and total acidity in juice were also investigated. As conclusion, deficit irrigation/fertigation with PRD technique can be successfully used in soilless grown cucumber and PRD applications in soilless grown greenhouse cucumber have good potential for saving water and nutrients as well as its environmental friendly nature with minimized drainage discharge.
机译：该实验以研究在无土生长温室黄瓜PRD（根系分区干燥）技术进行。四个灌溉处理已经实现：（1）全部开，（2）全封闭，（3）PRD开和（4）PRD-关闭。下充分灌溉处理（全开和全闭），所有的根与使用滴灌的一行的营养液的涂敷量每灌溉进行润湿。相比充分灌溉处理PRD系统的处理接收到的35％的降低的养分溶液。在开放系统（全开放和PRD-打开）时，多余的营养液排出从温室引流。在封闭系统（全闭和PRD-关闭），从生长容器的底部的排水收集流出物并在系统中循环使用。对植物营养生长的治疗，如高度，叶数的效果和茎粗不显著。然而，叶重，总生物量重，叶面积和总收率由处理被显著影响。在实验中的总产列为全开放，PRD-打开，全闭和PRD-靠近与21.78，21.25，19.48分别和17.12公斤米〜（-2），。果特性如重量，直径，体积和水溶性干物质，EC和果汁总酸度也进行了研究。作为结论，亏灌溉/施肥与PRD技术可以成功地在无土生长的黄瓜无土生长的日光温室黄瓜珠三角应用中具有保存水分和养分以及其环境友好的性质与最小排水量良好的潜力。

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