Cost-effective application technique for carbon dioxide in forcing cultured Japanese persimmon (Diospyros kaki Thunb.) 'Tone-wase'

• Published in: Engeigaku kenkyuu Vol. 4; no. 1; pp. 47 - 50
• Main Authors: Imagawa, J. (Nara-ken. Agricultural Experiment Station, Kashihara (Japan)), Sugimura, T, Wakisaka, M
• Format: Journal Article
• Language: Japanese
• Published: Kyoto-City THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE 01.01.2005; Japan Science and Technology Agency
• Subjects: CARBON DIOXIDE ENRICHMENT; DIOSPYROS KAKI; FLOWERING; FRUIT; HEAT TREATMENT; PLASTIC FILM COVERS; WEIGHT
• ISSN: 1347-2658; 1880-3571
• DOI: 10.2503/hrj.4.47

Fertilization techniques using carbon dioxide with liquid CO2 and an exhaust of oil-burner were investigated for preventing decreased flower formation in forcing- cultured 'Tone- wase' persimmon. In both open-field and forcing culture, flower bud development rapidly progressed from 5- 6 weeks to 8 weeks after full bloom. Thereafter, flower bud development scarcely proceeded. CO2 fertilization from full bloom to the end of heating (just before fruit coloring), with both liquid CO2 application for 5 hours early every morning, which raised the CO2 concentration in the greenhouse to 1.500 ppm, with oil-burner exhaust all day long, improved flower bud formation, fruit weight and yield per tree. These methods lowered the cost of CO2 application to one-half or one-third of the cost for conventional treatment.