トマト長期多段栽培における多収のための統合環境制御下での温室環境と収量の推移

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タイトル別名
  • Fruit Yield and Environmental Condition under Integrative Environment Control for High Yielding Production at Long-Time Culture of Tomato
  • トマト チョウキ タダン サイバイ ニ オケル タシュウ ノ タメ ノ トウゴウ カンキョウ セイギョ カ デ ノ オンシツ カンキョウ ト シュウリョウ ノ スイイ

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We tried to research yield of tomato and environment condition under controlling environment for increasing yield at long-time cultivation in Japan. Seeds of three tomato cultivars, 'Momotaro York', 'Asabiyori 10' and 'Dundee' were sown on July 28, 2008, and seedlings were planted at 2.2 plants m^-2 in a rockwool system with high wire layering in greenhouse on August 29. Plants were grown until July 19, 2009. Cooling with a heat pump was conducted until the start time of opening ventilation windows everyday, and CO_2 was treated for keeping the level of 1000 ppm on the same time. Treatment of CO_2 was stopped after the start time of opening windows, and both a fogging device and a window opening and closing device were controlled for cooling air during daytime in warm season. A heat pump was used for decreasing night air temperature. From October, the control of fogging and window angles was conducted in order to keep both air temperature 23℃ and relative humidity 80%. The aim level of heating during night time was 16 or 18℃. In result, vapor deficit was below about 1 kPa on daytime until May 2009. Air temperature was kept from 20 to 25℃ with the exception of period at the last moment of cultivation. CO_2 concentration was maintained at the level of about 800 ppm during cold season, but it was below 400 ppm during high temperature season. Yield of fruits except heavily damaged fruits of 'Asabiyori 10' was 40kg m^-2 until July 19, 2009. It was thought that the treatment of increasing CO_2 concentration, controlling humidity and cooling air with fogging and heat pump was effective of increasing yield with high-yielding cultivar at the long-time cultivation in Japan.

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