Study on the respiration of crop plants : (5) Respiration rate of rice plant under transplanting or direct seeding culture

Abstract

Respiration rate of each part of rice plant growing under transplanting or direct seeding cultural method was measured (at constant temperature, 30°C) throughout the whole season. The respiration rate as expressed by dry-weight basis shows remarkable difference between the plant growing under different cultural methods. But the respiration rate based on the unit amount of protein was strikingly identical between the both plants, indicating that the transplanting practice causes much increase of protein content which can account for the increased respiration of dry-weight basis at that time, although no essential changes were caused in the respiration rate of protein basis.