AZOTL U GÜBRELEMEN İN ŞEKER PANCARINDA N İTRAT B İRİKİMİ VE ÜRÜN ÜZERINE ETK İSİ

Şeker pancannın verim ve nitrat kapsamına artan düzeylerde uygulanan azotun etkisini belirlemeyi amaçlayan bu çalışma, tarla koşullarında mikroplotlarda yürütülmü ştür. Azot topra ğa 0, 5, 20, 50, 100, 200, 500 mg/kg düzeylerinde ikiye bölünerek uygulanm ıştır. Deneme sonunda bitkilerin yaprak ve kök a ğırlıkları , yaprak ve kökün toplam-N ve NO3-N kapsamlan, belirlenmiştir. Araştırmadan elde edilen sonuçlara göre bitkilerin ya ş ve kuru ağırlı kları , NO3-N ve toplam-N kapsamlar ı artan azot düzeylerine ba ğlı olarak artmıştı r. En yüksek ürün, NO3-N ve toplam-N kapsamları sı rasıyla 200 ve 500 mg/kg azot uygulamalar ından elde edilmiştir.

Anahtar Kelimeler:

Şeker pancar', azotlu gübreleme, nitrat akümülasyonu.

EFFECTS OF NITROGENOUS FERTILIZATION ON YIELD AND NITRATE ACCUMULATION IN SUGAR BEET

The effects of increasing N rates on yield and nitrate content of sugar beet plant were studied under fıeld conditions on micro-plots. N was applied at 0, 5, 20, 50, 100, 200 and 500 mg/kg soil rates with two equal portions. At the end of the experiment, fresh and dry weights of the leaves and roots, and total-N and NO3-N contents of leaves and roots were determined. The results indicated that, all of the measured parameters were increased with the increasing nitrogen rates. The highest yield, total-N and NO3-N contents were obtained from the 200 and 500 mg/kg N treatments respectively.

Keywords:

Sugar beet, nitrogenous fertilization, nitrate accumulation,

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