The Physiological Reaction of the Young Apple Trees to Pruning by Using Radio isotopes Techniques

Rasheed Al-Said Omar

General Commission for Scientific Agricultural Research-
Rural Damascus Research Center
Plovdiv Institute, Bulgaria


The present research was conducted in Plovdiv -Bulgaria for four years (1987-1990). The objective of this research was to study the physiological reaction of the young apple trees of Belgolden variety by using different pruning processes, and to find the relationship between that and the assimilation rules of the plant by using the radio isotopes techniques. Three points were studied (i) the relationship between the branches together when formations, accumulation and using the nutrient elements which contain C14; (ii) the effect of the summer pruning to the distribution and using the nutrients elements contain C14 which is formed at the treated branch before pruning; and (iii) Following up the nutrients distribution contain C14 when cutting the branch which is treated by isotopes carbon, by summer pruning.
These trials showed that forming carbohydrate elements related to season when they were formed, therefore the biochemical different of using these elements.
The basic elements (starch, easy moving, sugar) concentrated mainly during autumn, and contribute to giving the new vegetative shoots. However, the elements which are formed during summer are used to grow the plant organs which are formed in it.
Key words: pruning, assimilation, isotopes, carbohydrate.