Effects of Nitrogen Fertilization on the Chlorophyll Content of Apple

The experiment was carried out during 2009 - 2011 period in Yalova conditions. The aim of the experiment is to determine fertigation and postharvest foliar fertilization methods with different nitrogen doses (0, 30, 60, 90 g/tree) and application times (Application:1 starts at early spring before the buds burst and ends 40-45 days ago from harvest, Application:2 In addition to A1 postharvest foliar nitrogen application, Application:3 starts after blooming and ends 40-45 days ago from harvest, Application:4 In addition to A3 postharvest foliar nitrogen application) effects on leaf chlorophyll content of Golden Sel B apple variety grafted on M9 rootstock. The experiment was designed according to randomized block factorial experiment design with three replication. According to the results increasing doses of nitrogen had increased the chlorophyll content of the leaves, however no significant differences was observed due to the different nitrogen application times on the chlorophyll content