PURPOSE:To carry out forced culture of vegetables, etc., at a rate twice as quick as natural culture using a method of biotechnology by applying thermal energy corresponding to the energy of two days in one day (counted as 8hrs) with a heat ray lamp in a dark factory shielded from outer atmosphere. CONSTITUTION:A heat ray lamp 1 is attached to the ceiling of a dark factory 5 shielded from outer atmosphere and vegetables 4, etc., are cultured by applying irradiation heat energy for 8hrs per day and stopping the irradiation for 4hrs. The growth of the vegetables, etc., corresponding to 2 days can be attained in one day (counted as 12hrs). Seed is sprouted in the above state. A chemical soil fertilizer of a culture liquid filled in a paraffin vessel 2 is absorbed through the root. Vegetables, flowers, ornamental foliage plants, etc., can be forcedly cultured by the biotechnological method utilizing the above thermal energy. The growth rate of the vegetables, etc., is two times the rate attained by conventional culture method.
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