抄録
NAITO, Toshihiko, IWANAMI, Yuuki and Shigeru IIZUMI (Tohoku Univ.) Some effects of fire on the regeneration of Sasa palmata. Jap. J. Ecol. 18,79-82 (1968). The burnt Sasa-type grassland described in this paper is situated in the Kawatabi Farm, Miyagi Prefecture. Before the 1965 fire, there had been no grazing and firing in this grassland, therefore, dead culms and leaves on the soil surface were abundant. The present study was made to clarify the regenerative vigor of Sasa palmata after the fire on May 26,1965. In August, 19■, the height and diameter of culms and the leaf area of the resprouted Sasa plants were decreased in the burnt area compared with the unburnt area. But, in the second year after the fire, no difference between the burnt and unburnt areas in these characters of resprouted organs was noticed. Therefore, the productive structure of the Sasa palmata community was developed with two strata of leaves in relation to the height of the community and the longevity of culms at the burnt area. But the phenomena mentiond above were not seen in the third year. On the other hand, The mode of distribution of these resprouted plants was contagious during two years after the fire. In addition, the field burnings were carried out in the Sasa-type grassland at Suzuri-ishi, Miyagi Prefecture. The temperatures during the fires at various heights were measured by means of the thermocouples. The highest temperature recorded was about 700℃ at the height of 11 to 14cm above the soil surface. But, the burning temperatures below the soil surface did not exceed 65℃. Therefore, the underground organs of this species were not affected by fire.
