The Effects of different irrigation methods and different nitrogen doses and forms on the yield and quality of watermelon

ABSTRACT MSc THESIS THE EFFECTS OF DIFFERENT IRRIGATION METHODS AND DIFFERENT NITROGEN DOSES AND FORMS ON THE YIELD AND QUALITY OF WATERMELON Ulaş ŞENYIGIT DEPARTMENT OF AGRICULTURAL STRUCTURES AND IRRIGATION INSTITUTE OF NATURAL AND APPLIED SCIENCES UNIVERSITY OF ÇUKUROVA Supervisor: Prof. Dr. Rıza Kanber Year: 1999, Pages:60 Jury : Prof. Dr. Rıza Kanber : Prof. Dr. Attila Yazar : Assis. Prof. Dr. Harun Koksal Different irrigation methods (S: Sprinkler; D: Drip), nitrogen forms (L: Liquid; G: Granule) with various amounts (based on applied line source sprinkler, Nı; N2; N3 kg/da) and two varieties of watermelon (P: Paladin; M: Madera) were studied. Based on the results, irrigation water amounts applied to the treatments ranged from 1 19.2 mm (first year) to 350.5 mm (second year). Nitrogen applications ranged from 5.1 kg/da (SL) to 10 kg/da (SG) in the all treatments. Total yield changed between 1325 kg/da (first year) and 5013 kg/da (second year) depending on year and treatments. Although the highest yield was taken from treatments in which liquid fertilisers were applied for both of the varieties in the first year. The varieties have different response to form and amounts of nitrogen in the second year. In this year, the highest yield was observed from SG treatments in Paladin variety. In Madera variety, the highest yield was taken from SGL treatments that granule and liquid fertiliser were applied together. The effects of irrigation methods and nitrogen levels on some quality parameters of watermelon were not important. However, fruit diameter of Madera was larger than Paladin variety. The longest fruit length was measured in Paladin-DL treatment. Key words: Watermelon, irrigation, fertigation, sprinkler. II