The effects of different irrigation methods and nitrogen doses and forms on the yield and quality of watermelon
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- Tez No: 565117
- Danışmanlar: Prof. Dr. RIZA KANBER, Prof. Dr. ATEF HAMDY
- Tez Türü: Yüksek Lisans
- Konular: Ziraat, Agriculture
- Anahtar Kelimeler: Watermelon, WUE, irrigation, fertigation
- Yıl: 1998
- Dil: İngilizce
- Üniversite: Istıtuto Agronomıco Medıterraneo Dı Barı (medıterranean Agronomıc Instıtute Of Barı)
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
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Özet (Çeviri)
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 vvatermelon (P: Paladin; M: Madera) were studied. The research was carried out at Research and Production Farm of Agricultural Faculty, Çukurova University during 1996 and 1997 growing season. Experimental design was strip for the first year and split-strip for the second year. Generally, plants were irrigated with 5-12 day intervals. Free water surface evaporation was used to determine irrigation water amount. irrigation water in the plot irrigated by drip irrigation was estimated based on irrigating 70% of the soil, as volume base that were used. In only SL and SGL treatments, three different nitrogen levels were formed providing gradient situation during the irrigation season. Based on the results, the most irrigation water amount was applied in the middle of June when the fastest growth was observed. irrigation water amounts applied to the treatments ranged from 119.2 mm (first year) to 350.5 mm (second year). irrigation water reduced by 14-29%. Nitrogen applications ranged from 5.1 kg/da (SL) to 10 kg/da (SG) in the treatments. Nitrogen saving reached up to 50%. Total yield changed betvveen 1325 kg/da (first year) and 5013 kg/da (second year) depending on year and treatments. Although the highest yield was obtained from treatments where liquid fertilizers were applied for both of the varieties in the first year of the experiment, response of varieties to nitrogen form and amounts was found different in the second year. The highest yield was obtained from SG treatments in Paladin variety. The yield decreased only by 12% in SL treatments where nitrogen was applied in liquid form. In Madera variety, the highest yield was taken from SGL treatments where granule and liquid fertilizer were applied together. Average water use and total vvater use effıciencies ranged from 6.91 to 12.95 kg/da/mm and from 4.46 to 9.54 kg/da/mm respectively. Water use effıciencies under drip irrigation were higher than under sprinkler inigation by 33% and 25% for Paladin and Madera varieties, respectively. In the same way, it was found that, the values of Madera produced 17% more than Paladin under sprinkler irrigation. Yield response factor (Ky) was 1.07 for total yield and 1.49 for marketable yield. It was. understood that the effects of irrigation methods and nitrogen levels on some quality parameters of watermelpn were not important. But, fruit diameter of Madera was larger than Paladin variety. The longest fruit length was measured in Paladin-DL treatment. As a result, it was determined that watermelon yield was increased by nitrogen which was applied through irrigation water. Therefore, it could be said that watermelon yield increased considerably with applying nitrogen together with irrigation water in each irrigation.
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