The Effect of Different Nitrogen Doses and Organic Fertilizer Aplications on Some Yield and Quality Traits in Potatoes

Abstract

This study was carried out to determine the effects of different nitrogen doses and organic fertilizer application on yield and quality characteristics of Başçiftlik Beyazı potato variety under Tokat-Kazova conditions. The research was carried out in three replications according to the Random Blocks Trial Design in 2016 and 2017. In the study, nitrogen doses will be applied as 0 (control), 10, 15, 20, 25, 30 kg N/da and a single dose of organic fertilizer (300 kg/da). Examined features; plant height, number of main stem, tuber yield per hill, average tuber weight, tuber number per hill, tuber yield per decare, dry matter ratio, starch ratio and marketable tuber ratio. Except for the number of main stems and tuber number per hill, all other properties were significantly affected by organic fertilizer and nitrogen doses. Tuber yield per decare was 2772.1 kg/da in the lowest control (0 kg N/da), while the highest 3961.8 kg/da was obtained from 20 kg N/da application. Tuber yield of 3083.7 kg/da was obtained in organic fertilizer (300 kg/da) application. The applied N doses increased the tuber size up to a certain dose, and the average tuber weight was 95.2 g in 25 kg N/da application. Increasing nitrogen doses reached the highest efficiency at 20 kg N/da in the first year of the research and 30 kg N/da in the second year. Although better results were obtained from the organic fertilizer application (3083.7 kg/da) compared to the control application (2772.1 kg/da), it was stated that nitrogen fertilizer should be applied to increase the tuber yield per decare and according to the average of two years, 20 kg/da nitrogen application (3961.8 kg/da) is recommended.