Açiçği bitkisinin farklı gelişme dönemlerinde azotlu gübrelemenin bazı agronomik özelliklere etkisi

Bu çalışmada, sera koşullarında saksıda yetiştirilen Olga ayçiçeği çeşidinin bitkide farklı glişme dönemlerinde (çiçeklenme+tabla oluşumu, süt olumu, olgunlaşma ve hasat) uygulanan azotlu gübre seviyelerinin (0; 0,50; 0,75; 2,25; 3,0 g/saksı N) bitki boyu (cm), tabla çapı (cm) ve tabla verimi (g) üzerindeki etkileri araştırılmıştır. Elde edilen bulgulara göre, uygulanan ilk azot seviyesinde (0,50 g/saksı N) bitki boyu bakımından önemli düzeyde azalma, diğer iki agronomik özellik yönünden de artışların olduğu daha sonraki dozlarda azotlu gübrenin bu etkisinin belirgin şekilde değişmediği sonucuna varılmıştır.

Anahtar Kelimeler:

azotlu gübreler, ayçiçeği, tarımsal özellikler

The effect of nitrogen application at different growing periods on some agronomic traits in sunflower

Different levels of nitrogen (0; 0,50; 0,75; 2,25; 3,0 g/saksı N) at different growing periods (flowering and head establishment, grain filling, maturity and harvest) were applied to the plants grown in pots at greenhouse conditions. Cv. Olga was used in the study. Plant height, head diameter and head yield characters were determined. Based on the results, it can be concluded that plant height reduced significantly with the first level of nitrogen application (0,50 g/sakst N). While head diameter and head yield increased considerably. Other levels of nitrogen application have not affected traits studied in sunflower dramatically.

Keywords:

nitrogen fertilizers, sunflowers, agronomic characteristics,

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El-Sayed, M.M., L.K. Mohammed, and M.M. Ebaid. 1984. Annalsof Agricultural Science, Moshtohor 21(1):251-261.
Farah, M.A., M.F., Soliman, H.K. Baknati, and I.M. Antar. 1981. On the response of two sunflower varieties to nitrogen and phosphorus fertilisation under saline conditions. Agricultural Research Review 59(4):143-155.
Hocking, P.J., Randall, and P.J. Pinkerton. 1987. Sulphur nutrition of sunflower as affected by nitrogen supply: Effects on vegetative growth, the development of yield components, and seed yield and quality. Field Crops Research 16(2):157-175.
John, H., L., Massey. 1971. Effects of nitrogen rates and plant spacing on sunflower seed yields and other characteristics. Agronomy Journal 63:137-138.
Mathers, A.C., B.A., Stewartrh. 1982. Sunflower nutrient uptake, growth and yield as affected by nitrogen or manure and plant population. Agronomy Journal, vol. 74,911.
Nasır, M.S., Mohammed Maqsoop, Rıza Ahmed, and N. Yasin. 1988. Growth, yield and oil content of spring sunflower as influenced by N, P, K Fertilizer application. Soil and fertilizers, 51(1).
Nur, I.M., 1976. Sunflower response to nitrogenous fertilisation. Soil and Fertilisers. 30(6).
Salleh, S.A., M.A. Ashoub, and M.M. El-Gazzar. 1984. Annals of Agricultural Science, Ainshoms University 261(2): 731-745.
Yurtseven, N., 1984. Deneysel istatistik metodlar. Toprak ve Gübre Araş. Enst. No: 121, Ankara.
Zubriski, J.C., D.C., Zimmerman. 1974. Effects of nitrogen, phosphorus and plant density on sunflower. Agronomy Journal, Vol. 66, 798-799.