Abstract
1) In this paper the authors discussed about the factors which affect the utilization efficiency ("regrowth-utilization rate") of reserve substances in some grasses. 2) The optimum temperature range of the "regrowth-utilization rate" in cool season grasses differed from that in warm season grasses. 3) In cool season grasses, high "regrowth-utilization rate" were obtained under 15-20℃ temperature, and under 25-30℃ in warm season grasses. 4) There was no direct relation between the contents of carbohydrate or nitrogen in stubble and the "regrowth-utilization rate" in all grasses. 5) Tiller number or regrowth-tiller number were the main factors which affect the fluctuation of "regrowth-utilization rate" in the grasses.
