Azotlu gübrelerin turp bitkisinde (Raphanus sativus L.) bazı ürün ölçütleri ve koflaşma ile nitrat birikimi üzerine etkisi

Toprağa 10 ve 20 kg/da düzeylerinde uygulanan Amonyum Sülfat, Amonyum Nitrat ve Öre gübrelerinin turp bitkisinde toplam ürün (yaprak + yumru) miktarı, tepe-kök oranı, belirli çaplarda katagorize edilmiş yumru miktarı ve sayısı, yumruda koflaşma, toplam N ve $NO_3$ içerikleri üzerine etkileri önemli bulunmuştur. Azotlu gübreler yumru miktarını, toplam azot ve $NO_3$ içeriklerini artırırken yumruda kofiaşmayı azaltmıştır. Yüksek azot uygulama düzeyinde ürün miktarı azalmış $NO_3$ içeriği ve $NO_3$ fraksiyonu oranı artmıştır. Turp bitkisi daha büyük yumru çapı ve ürün miktarı, daha az koflaşma ve $NO_3$ birikimi yönünden Amonyum Sülfat gübresine daha iyi tepki vermiştir.

Anahtar Kelimeler:

Raphanus sativus, uygulama oranı, nitrat, azotlu gübreler, koflaşma, bitki bozuklukları, turp

Effect of nitrogenous fertilizers on the some quality parameters, pithiness and nitrate accumulation in radish (Raphanus sativus L.)

The effects of the application of Ammonium Sulphate, Ammonium Nitrate and Urea fertilizers to greenhouse soil at 10 and 20 kg/da Nitrogen level on total yield (leaf + tuber), top and root rate, categorised tuber in a given radius, pithiness in tuber, total N and $NO_3$ contents in radish plant were found to be important. While pithiness in tuber decreasing, tuber yield total N and $NO_3$ contents were increased by me applications of nitrogenous fertilizers. Total Radish yield was decreased and $NO_3$ content increased at higher nitrogen application level. Radish plant has relatively better responded to Ammonium Sulphate fertilizer in view of the yield, pithiness and $NO_3$ accumulation.

Keywords:

Raphanus sativus, application rates, nitrate, nitrogen fertilizers, pithiness, plant disorders, radishes,

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Aydeniz, A. 1985. Toprak Amenajmam, A.O. Ziraat Fakültesi Yayınlan: 928, Ankara
Barker, A.V., Peck, N.H., MacDoııald, G.E. 1971. Nitrate accumulation in vegetables, I. Upland Soils. Agronomy J., 63:126-129.
Bhat, K.L. 1996. Effect of different levels of nitrogen and phosphorus on yield of different cultivars of radish. Crop Research H., 11(2): 204-206.
Blom-Zandstra, M. 1989. Nitrate accumulation in vegetables and its relationship to guality. Ann, App. Biol., 115:553-561.
Bremner, J.M. 1965. Methods of soil analysis, Part 2 Chemical and Microbiological properties. In Ed. C.A. Black, American Soc. of Agronomy, Inc. Pub. Agron. Series. No.9, Madison, Wisconsin, U.S.A.
Brown, J.R., Smith, G.E, 1966. Soil fertilization and nitrate accumulation in vegetables. Agronomy Journal, 58: 209-212.
Federova, M.I., Mugniev, A.F. 1989, The effect of conditions of mineral nutrition on the yield and quality of some radish cultuvars. Agrokhimiya, 1:69-72.
Ghanti, P., Sounda, G., Ghatak, S. 1989. Effect of levels of nitrogen and soil moisture regimes on growth and yield of radish Environment and Ecology, 7(4): 957-959,
Lovato, A., Montanari, M., Miggiano, A,, Quagliotti, I,. 1994. Nitrogen fertilization of seed radish (Raphanus sativus L.): effects on yield and N-content in seed, plant and soil. Acta-Horticulturae, 362: 117-124.
Mills, H.A., Barker, A.V., Maynard, D.N. 1976. Nitrate accumulation in Radish as affected by nitrapyrin. Agronomy Journal, 68: 13-17,
Oraman, N. 1968 Sebze timi. Ankara Oniv. Ziraat Fak. Yayınlan: 323, Ders Kitabı: 117, Ankara Üniversitesi Basımevi, Ankara
Park, K W , Fritz, D. 1990. The effect of growing season, harvest date, fertilizer rate and soil moisture on pithiness of radish (Raphanus sativus L. var. niger). J. of the Cruciferae Korean Society forHort. Science, 31(1): 1-6.
Schouwenburg, J., Walinga, I. 1975, Methods of analysis for plant material. Agric Univ. Wagemngen, The Netherlands.
Srinivas, K., Naık, L.B. 1990. Growth and yield of radish (Raphanus sativus L.) in relation to nitrogen and potash fertilization. Indian J. of Horticulture, 47(1): 114-119.
Tlustosh, P, Pavlikova, D , Balik, J., Matousch, O. 1994, The use of coated ammonium nitrates and liquid urea condensates in vegetable growing. Zahradnictvi, 21(2): 69-82.
Topcuoğlu, B. Yalçın, S.R. 1997. Değişik azotlu gübre uygulamalarının serada yetiştirilen kıvırcık marul bitkisinde verim ve kalite ile bazı bitki besin maddesi içeriklen üzerine etkisi. Akd. Oniv. Ziraat Fak. Dergisi, 10(1):211-222.
Topcuoğlu, B., Kütük, C. 1998. Çeşitli azotlu gübrelerin değişik zamanlarda hasat edilen ıspanak bitkisinde (Spinaceae oleraceae E.) oksalik asit oluşumu ve azot asimilasyonu üzerine etkisi. Akd. Oniv. Ziraat Fak. Dergisi, 11(1):1-10.
Warncke, D.D., Barber, S.A. 1973, Ammonium and nitrate uptake by corn (Zea mays L.) as influenced by nitrogen concentration and NH4+/NO3 ratio. Agronomy J., 65: 950-953.
Zabunoğlu , S,, Karaçal, I. 1982. Azotlu gübrelemenin marul ve ıspanakta nitrat ve nitrit birikimine etkisi. TÜBİTAK VII. Bilim Kongresi, Adana.