Effect of electric illumination, carbon dioxide supplementation and underground heating on the growth and yield of strawberry [Fragaria] ""Tochiotome"" in forcing culture
2001
Shigeno, T. (Tochigi-ken. Agricultural Experiment Station, Utsunomiya (Japan)) | Tochigi, H. | Oohashi, Y. | Inaba, Y.
The effects of culture management technologies, such as electric illumination, carbon dioxide supply, and underground heating, on the growth and yield of strawberry ?Tochiotome? in forcing culture were investigated. Growth of plants in severe cold was promoted by electric illumination. The yield after the second axillary flower cluster stage was increased, resulting in an increase in total yield. Electric illumination should be started in early to mid-December in Short-day and low night temperature treatment of late-August planting, or in the latter half of November if the treatment of mid-September planting. Short-day and low night temperature treatment and Carbon dioxide supplementation was less effective at maintaining plant growth. Nevertheless, it resulted in better yield, since earlier harvest after the first axillary flower cluster stage shortened the harvest interval. Underground heating reduced plant growth in severe cold, promoted leaf opening, and increased the number and weight of leaves after the second axillary flower cluster stage, resulting in better yield. Underground heating should be started by the first half of December. Use of a combination of these three culture management technologies provided synergistic effects compared to their use in isolation. The combination of electric illumination, to maintain leaf area, and carbon dioxide supplementation, to promote photosynthetic capacity of leaves, had the best synergistic effect.
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