Studies on the Frost Hardiness of Tea Plant : 3. Effect of temperature and day-length on the growth and hardening of tea plant

Abstract

The effect of temperature and day-length on the growth and cold-hardiness of tea plants was studied. The growth temperature showed a close relation on the hardening phenomenon of tea plants, and the higher the temperature the weeker became the plants. Especially when the temperature exceeded 20°C, the plants became very week. Shortday treatment reduced the growth of tea plants in all varieties used, and accelerated the hardening effect of cold temperature.