Freezing resistance of winter bud and xylem at each tip, middle and base portion of current year twigs of 32 chestnut cultivars was measured on October 30, December 1,1977 and January 10, 1978.
The bud and xylem collected on October 10 and bud on Dec...
Freezing resistance of winter bud and xylem at each tip, middle and base portion of current year twigs of 32 chestnut cultivars was measured on October 30, December 1,1977 and January 10, 1978.
The bud and xylem collected on October 10 and bud on December 1, 1977 did not show consistant difference in freezing resistance among tip, middle and base portion of the twigs. Freezing resistance of the xylem collected on December 1,1977 and January 10,1978 was in order of tip, middle and babe portions from highest to lowest in most cultivars of chestnut.
The importance of lower freezing resistance of the base portion than the tip was discussed to determine cold resistant cultivars and grafting methods of chestnut.