Effects of different irrigation intervals on the yield and quality of peanuts grown in Düzce conditions

This study was carried out in the year of 2018 in the Central District of Düzce province in order to determine the yield and quality characteristics of peanuts irrigated by sprinkler irrigation method in different irrigation intervals. The research was conducted with 3 repetitions according to the random blocks trial pattern. Four different irrigation intervals were applied in the experiment (S0: without irrigation, S1: 7 days, S2: 12 days, S3: 7-12 days with consecutive alternatives). Irrigation subjects were applied by giving the total amount of water evaporated from a Class A pan. According to the FAO Penman – Monteith method, the reference plant water consumption (ET0) was found to be 484.9 mm. Actual plant water consumption (ETC) values in peanuts ranged from 322.4 to 666.7 mm. In addition, the seasonal evaporation amount (Ep) from Class A pan was measured as 603.6 mm, and the seasonal reference plant water consumption determined by using the Class A pan was determined as 513.1 mm. According to the results of the study, shell grain yield values ranged from 262.2 to 400.6 kg/da, average number of capsules per plant values ranged from 25 to 33 units/plant, internal ratio values ranged from 57.4 to 70.8%, 100 seed weight values ranged from 103.5 to 112.8 g, fat ratio values ranged from 45.1 to 51.4%, protein ratios ranged from 18.4 to 25.6%. It was found that there was a statistically significant relationship between irrigation interval and yield, internal rate, oil and protein ratios; and consecutive alternating irrigation interval of 7-12 days was the most prominent issue. 2019, 59 PAGE KEYWORDS: Peanut, Evapotranspiration, A class pan evaporation, Sprinkler irrigation, Irrigation interval