INFLUENCE OF RELATIONS BETWEEN BUD AND MOTHER PLANT ON CHANGES IN PEACH BUD DORMANCY.
At intervals of 7–10 days plants and one bud cuttings from these two lots and cuttings chilled in the sand were transferred into a forcing chamber (20°C). The bases of the cuttings were placed in tap water.
Artificial chilling slightly hastened the leaf bud opening in every case. Around 20 days at 5°C were sufficient to release a high percentage of buds from dormancy.
Leaf buds of cuttings separated from the plants at leaf fall and chilled in moistened sand responded most rapidly the forcing conditions, but in a more irregular manner than those chilled on the mother plants.
The findings regarding the changes of bud dormancy in the one bud cuttings were initially completely different from those in the whole plants.
From late fall until December 28, the leaf buds of cuttings were released from dormancy faster and in higher percentages than those of the whole plants. Afterwards, there were no great differences although the bud breaking percentage of the plants was slightly lower and more constant.
The use of different methods and materials (one bud cuttings or whole plants) for the evaluation of the chilling requirement is discussed.