THE EFFECT OF SOME ROOTSTOCKS ON THE PHYSICAL AND CHEMICAL PROPERTIES OF FRUIT GROWING PROCESS IN ANNA APPLE CULTIVAR

摘要

The apple tree that grows in temperate, especially cold-temperate climatic regions between the latitudes of 30° - 50° in the world is also successfully being grown in subtropical climate conditions by using the cultivars with low chilling needs. In this study, phenological, pomological and some chemical features of 'Anna' apple cultivar on different rootstocks were determined in the conditions of Sanliurfa, which shows a semiarid climate characteristic, between 2014 and 2015. In the research, fruit diameter measurements of the fruits were made at 5-day intervals from fruit set to fruit harvest. According to the results obtained, it was determined that the growth of fruit diameter on three different rootstocks in Anna apple cultivar showed a growth that would form a single sigmoid curve. It was determined that Anna apple cultivar is grafted on different rootstocks reached to the earliest full blooming stage (18~(th) March) and the earliest harvest date (5~(th) July) on M9 rootstock. The biggest fruits (221.42 g) were obtained from the trees on MM 111 rootstocks, the smallest fruits (179.76 g) were obtained from the trees on seedling rootstocks, minimum Brix degree (14.8) was obtained from the trees on seedling rootstocks, and minimum titratable acidity (0.61) was obtained from the trees on MM 111 rootstocks. In Anna trees, the period from full flowering to harvest varied between 109 days (for M9) and 115 days (for seedling rootstocks). The highest fruit set rate was obtained from the trees on the seedling rootstock with 22.6.