This experiment was carried out to determine the regrowth rate of orchardgass immediately after cutting and top-dressing, and also to study the changes of carbohydrates and nitrate in the plant. The plant used in this experiment was grown in simple growth chamber from September, 1978 to January, 1979. The temperature, light intensity, and light period were controlled to be 15-20℃, 4,250 Lux, and 15 hours. The results obtained were as follows 1. The period of recovery to initial stands of ter cutting was about 4 - 5 weeks in terms of dry matter and about 5 weeks in the content of total water-soluble carbohydrates(T. S. C). 2. The content of total water-soluble carbohydrates of plant parts was the highest in sheaths, and the lowest in roots, and the content of nitrate was the highest in blades, and the lowest in roots. 3. Cutting resulted in a temporary decrease of total water-soluble carbohydrates in the shoots. The nitrate content decreased directly after cutting and increased gradually, however, the changes of nitrate in the shoot s and roots did not show the same trends.