Browsing by Author "AYAS, SERHAT"

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Deficit irrigation effects on cauliflower (Brassica oleracea L. var. Skywalker F1) yield under unheated greenhouse conditions.
(Parlar Scientific Publications (P S P), 2019-01-01) Büyükcangaz, Hakan; Ayas, Serhat; BÜYÜKCANGAZ, HAKAN; AYAS, SERHAT; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Yenişehir İbrahim Orhan Meslek Yüksekokulu.; C-4137-2019; AAH-2934-2021
The aim of this study was to determine the effect of deficit irrigation on yield of cauliflower grown under unheated greenhouse conditions. The research was carried out at the Agricultural Research Station of Yenisehir Vocational School of Bursa Uludag University in Bursa, Turkey, in 2008 and 2009. In the study, water was applied to cauliflower as 1.00, 0.75, 0.50, 0.25 and 0.00 % (as control) of evaporation from a Class A Pan corresponding to 2 day irrigation frequency. Irrigation water applied ranged from 70-530 mm to 70-528 mm, and water consumption ranged from 90-548 mm to 90-540 mm. The effect of irrigation water level on the yield, head height, head diameter, head weight and dry matter were found to be significant. The highest yield were 30.4-28.8 t ha(-1). Crop yield response factors for cauliflower (k(y)) were found as 0.90 and 0.93 for both years. The highest values of water use efficiency (WUE) and irrigation water use efficiency (IWUE) for 2008 and 2009 years of K2(cp) treatment were calculated to be 0.069 kg m(-3) - 0.064 kg m(-3) and 0,067 - 0,064 kg m(-3), respectively. K2(cp) application (75%) can be recommended as the most effective irrigation level for the cauliflower to which drip irrigation is applied under scarce and unheated greenhouse conditions.
Different irrigation and fertilization levels and mulching materials on the yield and quality of strawberry
(University Federal Lavras - UFLA, 2023) Ayas, Serhat; AYAS, SERHAT; Bursa Uludağ Üniversitesi/Yenişehir İbrahim Orhan Meslek Yüksekokulu; 0000-0002-9630-9699; C-4137-2019
The strawberry (Fragaria spp.), one of the most important berry fruit, is cultivated in many regions of Turkey. Considering its agricultural importance, the objective of this study was to determine the interactions of three important factors affecting the yield of strawberries. Measurements of the physical and quality properties of strawberry were carried out in the laboratories of Bursa Uludag University. In the research, four different irrigation topics, three different fertigation and three different mulching topics (without mulch (M0),with PE black mulch material (M1), with PE transparent mulch matterial (M2) were selected. Drip irrigation method was preferred in order to apply water amounts at different irrigation and fertigation levels. In our study, the highest and lowest irrigation water amounts in both trial years were found to be 380-95 mm and 420-105 mm, respectively, while the highest and lowest actual evapotranspiration values were calculated as 440-220 mm and 465-280 mm, respectively. The maximum and minimum yield values of the study years were calculated as 5.05-18.70 t ha-1 and 1.20-8.7 t ha-1, respectively, from I100F100M1 and I25F50M0 treatments. However, when the reductions in yield and quality losses are evaluated together, despite the reductions in irrigation water and fertigation levels, I75and F75 topics can be recommended. Also, in mulching treatments, black mulch material (M1) should be chosen over clear mulch material (M1) and no mulch (M0).
Different irrigation and fertilization levels on the yield and quality of dent corn
(Univ Federal Lavras-ufla, 2023-01-01) Ayas, Serhat; AYAS, SERHAT; Bursa Uludağ Üniversitesi/Yenişehir İbrahim Orhan Meslek Yüksekokulu; C-4137-2019
Dent Corn (Zea mays indentata indentata), one of the most important plants produced for industrial purposes in many regions of Turkiye. The aim of this study was to determine the interactions of two important factors affecting the yield of dent corn. The study was conducted at the Bursa Uludag University Yenisehir Ibrahim Orhan Vocational School Agricultural Research Field in 2019-2020. The altitude of the study area was 240 m. Measurements of the physical and quality properties of dent corn were carried out in the laboratories of Bursa Uludag University. In the research, four different irrigation topics and three different fertigation topics were selected. Drip irrigation method was preferred in order to apply water amounts at different irrigation and fertigation levels. In our study, the highest and lowest irrigation water amounts in both trial years were found to be 780-195 mm and 800-200 mm, respectively, while the highest and lowest actual evapotranspiration (ETa) values were calculated as 830-290 mm and 855-432 mm, respectively. The maximum and minimum yield values of the study years were calculated as 14.6-15.2 t ha-1 and 4.0-5.1 t ha-1, respectively, from I100F100 and I25F50treatments. However, when the reductions in yield and quality losses are evaluated together, despite the reductions in irrigation water and fertigation levels, I75and F75 treatments can be recommended.
Water-yield relationships of deficit irrigated tomato (Lycopersicon lycopersicum L. var. hazar F1)
(Corvinus Univ Budapest, 2019-01-01) Ayas, Serhat; AYAS, SERHAT; Uludağ Üniversitesi/Yenişehir İbrahim Orhan Meslek Yüksekokulu; C-4137-2019
This trial was realized in the greenhouses of Uludag University Yenisehir Vocational School in Bursa province of Turkey between 2009 and 2010 to investigate effects of water deficit on yield and quality parameters of tomato during four crop growth stages. In this trial, fourteen irrigation treatments in four growth periods (vegetative, flowering, yield formation and ripening) of tomato (Lycopersicon lycopersicum L. var. Hazar F1) were constituted and the yield and quality parameters found from these treatments were evaluated. The layout of the experiment was a completely randomized block design with three replications for each of the fourteen irrigation treatments tested. According to the content of the treatments, the irrigation amount water applied to the plants varied between 0 and 554 mm in the first year, and between 0 and 556 mm in the second year. Water consumption of tomato in the first year ranged between 300 and 725 mm and in the second year ranged between 340 and 746 mm. Yield, fruit weight, diameter, height and dry matter ratio were determined statistically significant. In 2009 and 2010 years, the maximum yield were found as 92.2 t ha(-1) and 93.4 t ha(-1) in V100F100Y100R100 treatments, while the minimum yield were found as 2.0 t ha(-1) and 4.0 ha(-1) in the V0F0Y0R0 treatments, respectively. Water- yield relationship factors (k(y)) in 2009 and 2010 years were found as 1.05 and 1.06, respectively. The maximum WUE and IWUE values were obtained from vegetative and ripening periods. Vegetative and ripening periods may be suggested as the maximum efficient irrigation periods for the tomato applied with drip irrigation under unheated greenhouse conditions.