Azot ve Kükürtlü Gübre Uygulamalarının Kuru Soğanda (Allium cepa L.) C Vitamini, Antioksidan Aktivite ve Toplam Fenolik Madde Miktarlarına Etkileri

Bu çalışma, artan dozlarda azot ve kükürtlü gübre uygulamalarının kuru soğanın C vitamini ve toplam fenolik madde miktarı ile antioksidan aktivitesi üzerine etkisini belirlemek amacıyla 2012 ve 2013 yıllarında Yalova Atatürk Bahçe Kültürleri Merkez Araştırma Enstitüsü deneme alanlarında yürütülmüştür. Denemede, azotun 0, 5, 10 ve 20 kg da-1 dozları ile kükürdün 0, 2.5, 5 ve 10 kg da-1 dozlarının kombinasyonları uygulanmıştır. Yapılan değerlendirmeler sonucunda, azot ve kükürtlü gübrelemenin kuru soğanın C vitamini içeriği üzerine etkisi önemsizdir. Kuru soğanın C vitamini içeriği yıllara göre sırasıyla 2.60-4.21 mg 100 g-1, 2.86-4.35 mg 100 g-1 olarak belirlenmiştir. Uygulamaların 2012 yılında toplam fenolik bileşenler ve antioksidan aktivite üzerine etkisi önemlilik arz ederken; 2013 yılında bir farklılık belirlenememiştir. NxS uygulama interaksiyonu gerek toplam fenolik bileşenler ve gerekse antioksidan aktivite üzerinde farklılıklar yaratmıştır. Soğan başlarının toplam fenol içerikleri N20S10 uygulamasında 63.16 mg 100 g-1 ve N0S2.5 uygulamasında ise 76.92 mg 100 g-1; antioksidan aktivitesi ise N5S2.5 uygulamasında 202.34 mg 100 g-1 ve N0S2.5 uygulamasında 301.94 mg 100 g-1 olarak belirlenmiştir

Efect of Nitrogen and Sulphur Applications on The Amount of Vitamin C, Antioxidant Activity and Total Phenolic Matter of Dry Onion (Allium cepa L.)

The aim of this study was to determine the effect of nitrogen and sulphur applications on the amount of vitamin C, antioxidant activity and total phenolic compounds of dry onion. The study was carried out in Atatürk Central Horticultural Research Institute in the years of 2012 and 2013 in Yalova. The fertilizer was applied in combination of N, S and rates of the N–S combinations was 0, 5, 10 and 20 kg N da–1 and 0, 2.5, 5 and 10 kg S da–1.At the end of the study there were any relationship between N, S fertilization and the content of dry onion’s vitamin C. But, total phenolic content and antioxidant activity were significantly affected from NxS fertilization in the first year. The total phenolic content of onion bulbs were determined as 63.16 mg 100 g–1 (N20S10) and 76.92 mg 100 g–1 (N0S2.5). On the other hand, the antioxidant activity was determined 202.34 mg 100 g–1 (N5S2.5) and 301.94 mg 100 g–1 (N0S2.5) also. There was no effect from N, S fertilization in the second year on both total phenolic content and antioxidant activity

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Akerström A, Forsum A, Rumpunen K, Jaderlund A, Bang U (2009) Efects of Sampling Time and Nitrogen Fertilization on Anthocyanidin Levels in Vaccinium myrtillus Fruits. J. Agric. Food Chem. 57: 3340–3345.
Aksoy M (2010) Kanser ve Beslenme, Hacettepe Üniversitesi Beslenme ve Diyabetik Bölümü. http://www.ukdk.org/ pdf/kitap/14.pdf (Erişim Tarihi: 04/01/2010).
Al–Fraihat AH (2009) Efect of Diferent Sulphur and Nitrogen Fertilizer Levels on Growth, Yield and Quality of Onion, Jordan Journal of Agricultural Sci., 5(2): 155-166
Anonim (2014) Sebze Çeşitleri, http://yalovabahce.gov.tr/ sebzecesit.aspx (Erişim Tarihi: 18/10/2013).
Anonim (2017a) FAO Stat Crop Production, http://faostat3. fao.org/faostat–gateway/go/to/ download/q/qc/e (Erişim Tarihi: 12/02/2017).
Anonim (2017b) Bitkisel Üretim ve İstatistik Veri Tabanı, http://tuikapp.tuik.gov.tr/bitkiselapp/ bitkisel.zul (Erişim Tarihi: 17/02/2017).
Benard, C, Gautier H, Bourgaud D, Graselly D, Navez B, Caris–Veyrat C, Weiss M Genard M (2009) Efects of Low Nitrogen Supply on Tomato (Solanum lycopersicum) Fruit Yield and Quality with Special Emphasis on Sugars, Acids, Ascorbate, Carotenoids, and Phenolic Com., J. Agric. Food Chem, 57: 4112–4123.
Beşirli G, Sönmez İ, Albayrak B, Ruşen M, Çakır E, Maden S, Barış A, Kepenekçi İ, Evlice E, Karataş SE (2007) Soğan Yetiştiriciliği, Tarım ve Köyişleri Bakanlığı Çiftçi Eğitim Serisi Yayın No: 57, Ankara, 7-22.
Bloem E, Haneklaus S, Schung E (2004) Influence of N and S Fertilization on the Alliin Content of Onions and Garlic, J. of Plant Nut. 7(10): 1827–1839.
Brown B (2000) Onions. Southern Idaho Fertilizer Guide, CIS 1081, University of Idaho.
Cemeroğlu B (2010) Gıda Analizleri, Gıda Teknolojisi Derneği Yayınları, No:34, 2. Baskı, Ankara, 87–96.
Dorais M, Ehret D, Papadopoulos A (2008) Tomato (Solanum lycopersicum) Health Com.: From the Seed to The Consumer. Phytochemical Rev. 7(2): 231–250.
Dumas Y, Dadomo M, Dilucca G, Grolier P (2003) Efects of Environmental Factors and Agricultural Techniques on Antioxidant Content of Tomatoes, J. Sci. Food Agric 83: 369–372.
Fenwick RG, Hanley AB (1990) Processing of Alliums: Use in Food Manufacture, CRC Press, Boca Raton, Florida, 3: 73–91.
Kawakishi S, Morimutsu Y (1994) Sulphur Chemistry of Onions and Inhibitory Factors of the Arachidonic–Acid Cascade, ACS SYM. SER. 546: 120–127.
Krishnamatuhy D, Sharanappa S (2005) Efect of Sole and Integrated Use of Improved Composts and NPK fertilizers on Quality, Productivity and Shelf Life Bangalore Rose Red Onion (Allium cepa L. ), Mysore J. of Agric. Sci., 39(3): 355–361.
Lawande KE (2010) Onion, National Research Centre for Onion and Garlic, Pune. http://obtrando.files.wordpress. com/2010/05/allium-sp-onion-keluarga-bawang-merah. pdf (Erişim Tarihi: 02/11/2010).
McCallum J, Porter N, Searle B, Shaw M, Bettjeman B, McManus M (2005) Sulphur and Nitrogen Fertility Afects Flavour of Field–Grown Onions, Plant and Soil 269: 151– 158.
Randle WM (1992) Onion Germplam Interacts With Sulphur Fertility for Plant Sulphur Utilization and Bulb Pungency, Euphytica, 59, p:151–156.
Randle WM (2000) Increasing N Concentration in Hydroponic Solutions Afects Onion Flavor and Bulb Quality, J. Am. Soc. Hort. Sc. 181: 254–259.
Robinowitch HD, Brewster JL (1990) Onions and Allied Crops, Vol. I, CRC Press, Boca Raton, Florida.
Rodrigues AS, Perez–Gregorio MR, Garcia–Falcon MS, Simal– Gandara J, Almeida DP F (2011) Efects of meteorological conditions on antioxidant flavonoids in Portuguese cultivars of white and red onions, Food Chemistry, 124(1): 303–308.
Thaipong K, Boonprakoba U, Crosbyb K, Cisneros–Zevallosc L, Byrnec LDH (2006) Comparison of ABTS, DPPH, FRAP, and ORAC Assays for Estimating Antioxidant Activity from Guava Fruit Extracts. Journal of Food Composition and Analysis, 19: 669–675.
Verardo V, Riciputi Y, Sorrenti G, Ornaghi P, Marangoni B, Caboni MF (2013) Efect of Nitrogen Fertilization Rates on The Content of Fatty Acids, Sterols, Tocopherols and Phenolic Compounds and on The Oxidative Stability of Walnuts. Food Science and Technology 50: 732-738.
Yurtsever N (1984) Deneysel İstatistik Metodlar. Köy Hizmetleri Genel Müd., Toprak ve Gübre Araştırma Enst. Yayın No 56, Ankara.