Studies on the Effect of the Relative Humidity of the Atmosphere on the Growth and Physiology of Rice Plants : VII. Effect of ambient humidity on the growth and dry matter production at various temperatures

Japanese Journal of Crop Science

Hiroyoshi CHUJO¹  Osamu TANAKA¹  Takashi HIRANO¹  Masayo OMORI¹  Gen-ichi HIRAI¹ 

关键词: Dry matter production;    乾物生産;    Photosynthetic rate;    光合成速度;    Relative humidity;    根数;    Rice;    水稲;    Top-root ratio (T-R ratio).;    相対湿度;    T-R率;   

DOI  :  10.1626/jcs.61.364

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The effect of relative humidity (RH) on the growth and dry matter production of rice seedlings was investigated at the early vegetative stage. Plants were grown for 10 days under 60 or 90% RH at 12-hr day/12-hr night temperatures of 22/18 (low), 28/24 (moderate) and 34/30 (high) °C. Dry matter production of the plants grown at 90% RH was higher at low and moderate temperatures, but much lower at high temperature than that of the plant grown in 60% RH. The increase of root dry weight was more influenced by RH than that of the top dry weight. Thus, the relative value of top weight to root weight (T-R ratio) of the plant grown under 90% RH decreased at the low temperature, but increased at the high temperature, as compared with that of the plant grown under 60% RH. At the moderate temperature, T-R ratio of the plant grown in 90% RH was almost the same as that of the plant grown in 60% RH. These results indicate that the effect of humidity on growth and dry matter production must be considered in association with the temperature.

【 授权许可】

Unknown