Abstract
Propagated plants of a clone from orchardgrass, var. Frode, were grown at 10°, 17°, 24°, or 30℃ in growth cabinets for 10 days before cutting under the natural daylength in January-February. After cutting at 5cm height, the plants grown under each of these temperature condition were devided into four groups and were grown at 10°, 17°, 24°, or 30℃, respectively. They were harvested 5, 12, and 25 days after cutting. The results are summarized as follows. 1. The temperature during 10 days before cutting influenced the growths of the grasses. When the plants were grown under higher temperature condition, the plant height and the leaf area were increased and the number of tillers was decreased. The dry weight and the carbohydrate content of the stubble increased with fall of the temperature. 2. After cutting, more accelerated regrowth was observed in dry weight and in leaf area when the plants were grown under lower temperature condition before cutting. This trend was remarkable when the temperature after cutting was high. The dry weight and the carbohydrate content of the basal part of the top of the plants grown under low temperature condition before cutting were large at each harvest time. This trend was more pronounced when the temperature after cutting was lowered. 3. When the plants were grown under higher temperature condition after cutting, more accelerated regrowth was observed in dry weight and in leaf area. This trend was more pronounced when the plants were grown under lower temperature condition before cutting. The dry weight and the carbohydrate content of the basal part of the top of the plants grown under low temperature condition before cutting increased with fall of the temperature after cutting.
