Studies on the effect of the relative humidity of the atmosphere on the growth and physiology of rice [Oryza sativa] plants, 8: Effect of ambient humidity on dry matter production and nitrogen absorption at various temperatures
1993
Hirai, G. (Osaka Gakuin Univ., Suita (Japan)) | Chujo, H. | Tanaka, O. | Okumura, T. | Takeuchi, S. | Hirano, T. | Omori, M.
The effect of relative humidity (RH) on the dry matter production and nitrogen absorption of rice seedlings (age in leaf member of 5) was investigated. Plants were grown for 4 days under 60 or 90% RH at 12-hr day/12-hr night temperatures of 24/20, 28/24, 32/28 and 36/32 degrees C. 1) Dry matter increase of leaves and roots in the plants grown at 90% RH was higher at 24/20 and 28/24 degrees C, but lower at 32/28 and 36/32 degrees C than that of the plants grown in 60% RH. 2) Nitrogen absorption and content of heavy nitrogen of leaves and roots in the plants grown at 90% RH were also higher at 24/20 and 29/24 degrees C, but lower at 32/28 and 36/32 degrees C than those of the plants grown in 60% RH. These results indicate that dry matter increase and nitrogen absorption of rice seedling are affected by humidity and temperature with highly significant correlations
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