A Comparison between Closed-type and Open-type Transplant Production Systems with Respect to Quality of Tomato Plug Transplants and Resource Consumption during Summer.

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Other Title
  • 閉鎖型苗生産システムと開放型苗生産システムの夏季におけるトマトセル成型苗の品質と資源消費量の比較例
  • [短報]閉鎖型苗生産システムと開放型苗生産システムの夏季におけるトマトセル成型苗の品質と資源消費量の比較例
  • ヘイサガタ ナエ セイサン システム ト カイホウガタ ナエ セイサン システム ノ カキ ニ オケル トマトセル セイケイ ナエ ノ ヒンシツ ト シゲン ショウヒリョウ ノ ヒカクレイ

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Abstract

Tomato (Lycopersicon esculentumMill., cv. Momotaro) plug transplants were grown in a closed-type (CTPS) and an open-type (OTPS ; i.e., greenhouse) transplant production systems during summer (11-15 August to 1 September, 2000) . The quality of transplants and water consumption in the CTPS were compared with those in the OTPS. Electric energy consumption per transplant was estimated in the CTPS. The CTPS was a system designed to produce transplants under artificial light in a relatively airtight structure with thermally insulated walls, and to produce high quality transplants using minimal resources. The CTPS employed a sub-irrigation system. Air temperature in the CTPS was maintained at 28°C during a 16 h photoperiod and at 19°C during an 8 h dark period by using an air conditioner. The OTPS employed an overhead irrigation system. Air temperature in the OTPS was partly controlled by using roof and side ventilators, but varied from 23 to 43°C depending on the weather conditions. The quality of transplants was higher in the CTPS than in the OTPS. Electric energy consumption per transplant in the CTPS was 0.7 MJ (0.2 kWh), which corresponded to a cost of 2.9-3.2 Japanese Yen. The amount of water consumed during the transplant production period in the CTPS was 1/12-1/16 of that in the OTPS. These results suggested that value-added transplants could be produced at a lower water consumption of resources in the CTPS than in the OTPS at low electricity consumption.

Journal

  • Environment Control in Biology

    Environment Control in Biology 41 (1), 57-61, 2003

    Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

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