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Chestnut has been used by humanity both as a fuel and as a food source for many years. Chestnut-related fertilization data is still limited today. This research was performed in order to study the fruit yield and some quality characteristics of the nitrogen doses to be applied in the chestnut plantations of Inegol (Bursa) during two years. In the study, were used sweet chestnut ( Castanea sativa Mill. cv. Sariaasilama) trees 20 years old. During 2012 and 2013 the doses of 0.5, 1.0, 1.5 and 2.0 kg N / tree were applied to the chestnut experimental orchard, except for the control. However, 0.75 kg P / tree and 1.5 kg K / tree basic fertilization were applied to each tree. In the experiment, each parcel was composed of 3 trees and 3 replications. According to the results of the study, the highest fruit yield was recorded as 31.8 and 32.8 kg / tree in 1.5 kg N / tree in both application years respectively. Total protein and starch in the highest fruit were determined as 12.8 and 36.3 g / 100 g in 1.0 kg N / tree dose in the 2013 year, respectively. The total sugar content in fruit was recorded as 10.8 g / 100 g in 1.5 kg N / tree in 2013. When all of these parameters are examined, the amount of nitrogen to be applied to a mature chestnut tree at 20 years old is determined as 1.5 kg N / tree / year.

Effect of Different Nitrogen Levels on Nut Yield and Some Quality Properties of Sweet Chestnut (Castanea sativa Mill.)