Onbir tritikale x Triticosecale Wittmack genotipinin azot kullanım etkinliği

Uygulanan dört azot N dozunun 0, 40, 80 and 160 kg N ha-1 , onbir tritikale genotipinin tane verimi, biyolojik verim, protein içeriği, toplam N alımı ve N kullanım etkinlik NUE indekslerine agronomik, fizyolojik, agrofizyolojik, N değerlendirme ve N kullanım etkinliğine etkileri iki yıl tarla koşullarında araştırılmıştır. Bu çalışmanın sonuçlarına göre, en yüksek tane ve biyolojik verimi, 80 kg N ha-1 doz uygulamasında olduğu belirlenmiştir. Tritikalenin tane protein içeriği ve toplam N alımı, uygulanan N dozlarıyla artarken, NUE indeksleri azalmıştır. TVD25 hattından en yüksek tane verimi 3765 kg ha-1 , biyolojik verim 19418 kg ha-1 , protein içeriği %16.3 ve toplam N alımı 178.8 kg ha-1 , Mikham çeşidinden en yüksek agronomik 14.6 kg kg-1 , agrofizyolojik 19.3 kg kg-1 ve N değerlendirme etkinliği %70.4 , Samur sortu çeşidinden ise en yüksek fizyolojik etkinlik 63.4 kg kg-1 elde edilmiştir. Yüksek verimli ve toplam N alımına sahip tritikale genotiplerinden, en düşük NUE değerleri hesaplanmıştır. Sonuç olarak, belirlenen N etkin tritikale genotipleri, topraktan N kayıplarını azaltmak ve NUE indekslerini artırmak için yapılacak ıslah programlarında kullanılmalıdır

Anahtar Kelimeler:

tane verimi, azot kullanım etkinliği, azot alımı, tritikale

Nitrogen use efficiency of eleven triticale x Triticosecale Wittmack genotypes

A field experiment with eleven triticale genotypes was conducted to assess the grain yield, biomass yield, protein content, total nitrogen N uptake and various indexes agronomic, physiological, agrophysiological, and apparent recovery efficiencies of N use efficiency NUE using different levels of N fertilizer 0, 40, 80 and 160 kg N ha-1 over two years. According to the results of this research, the grain yield and biomass yield were the highest with the N rate of 80 kg N ha-1. While grain protein content and the total N accumulation of triticale increased with the N application rates, the NUE indexes decreased with increasing N rates. The TVD25 line had the highest in grain yield 3765 kg ha-1 , biomass yield 19418 kg ha-1 , grain protein content 16.3% and total N uptake 178.8 kg ha-1 ; the Mikham cultivar was the highest in agronomic efficiency 14.6 kg kg-1 , agrophysiological efficiency 19.3 kg kg-1 and apparent recovery efficiency 70.4% and the Samur sortu cultivar was the highest in physiological efficiency 63.4 kg kg-1 based on the two-year-means. The low NUE index values were calculated from triticale genotypes having the highest yield and N accumulation. As a result, to reduce N losses from soil and increase the NUE indexes, N efficient genotypes in this study should be selected in breeding programs

Keywords:

grain yield, nitrogen use efficiency, nitrogen uptake, triticale,

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