Development for system of controlling fertigation amount in rockwool culture of muskmelons

甜瓜岩棉栽培灌溉施肥量控制系统的研制

• 批准号: 03660020
• 负责人: NUKAYA Akira
• 金额: $ 1.47万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03660020/
• 关键词: Muskmelon; Rockwool culture; Fertigation amount; Transpiration model; Solar radiation; Vapor pressure deficit (VPD); 茎流センサー; 拡散抵抗; メロン; ロックウ-ル栽培; 給液制御方法; 培地水分; 蒸散量; 含水率

The method of controlling fertigation amount in rockwool culture of muskmelons has not been established and relies on the experience in soil culture. Therefore, present experiment was conducted to develop system of controlling fertigation amount applying transpiration model.Fist of all, experiments were conducted to clarify relationships between intensity of radiation and transpiration. The 16.7 ml of nutrient solution per plant was supplied when the cumulative solar radiation reached to 217KJ/m^2. As a result, The amount is almost equal to transpiration rate in high radiation (clear days). But in rainy days transpiration rate was greater than the amount calculated, because of high VPD inside the greenhouse,especially in case of steaming during daytime in winter. Also muskmelon plants transpired about 300 ml/plant at night, in spite of no solar radiation.In the 2nd experiment, transpiration model based on difference of VPD between inside stomata and inside greenhouse was applied to the decision. As a result, the actual transpiration rate measured by the flow rate sensor was almost same as the rate calculated by the model. The model was used to supply the nutrient solution to muskmelons grown in greenhouse.Present study showed the controlling system which used the model based on difference of the VPD and solar radiation is better than applying only solar radiation as a parameter. Moreover, it was concluded that the model will be able to introduce to the commercial scale rockwool culture of muskmelons.

尚未建立麝香木培养物中控制施肥量的方法，并依赖于土壤培养的经验。因此，进行了目前的实验，以开发用于适用蒸腾模型的受精量的系统。所有实验，进行了实验，以阐明辐射强度与蒸腾强度之间的关系。当累积太阳辐射达到217kJ/m^2时，提供每植物的16.7 mL养分溶液。结果，该量几乎等于高辐射（晴天）中的蒸腾率。但是在雨天，由于温室内的VPD高，蒸腾率大于计算的数量，尤其是在冬季白天在蒸时。尽管没有太阳辐射，但马斯克梅隆植物在夜间发生了约300 ml/植物。在第二实验中，基于内部气孔内部和温室内部VPD差异的蒸腾模型被应用于该决定。结果，流速传感器测量的实际蒸腾率几乎与模型计算的速率相同。该模型用于为在温室中生长的麝香菌提供营养溶液。表明，基于VPD和太阳辐射的差异使用该模型的控制系统要比仅应用太阳辐射作为参数要好。此外，得出的结论是，该模型将能够向Muskmelons的商业规模岩石文化介绍。

项目成果

糠谷 明,中尾 穣: "ロックウ-ルによる温室メロンの養液栽培に関する研究(第7報) ロックウ-ル内含水率と生育との関係" 園芸学会雑誌. 60(別2). 278-279 (1991)

Akira Nukatani、Minoru Nakao：“使用岩棉进行温室甜瓜水培的研究（第 7 次报告）岩棉中的含水量与生长之间的关系”日本园艺学会杂志 60（第 2 部分）。 1991)