Effects of nitrogen and phosphorus fertilization on dry matter yield and quality of an abandoned rangeland
2012
E., Budakli Carpici | M.M., Tunali | N., Celik
The object of this study was to determine the effects of nitrogen and phosphorus fertilization on dry matter yield, crude protein content, ADF, NDF and total digestible nutrient of an abandoned rangeland in Bursa-Turkey in 2008 and 2009 years. Nitrogen was applied as urea (46 per cent N) at 0, 50, 100, 150, 200 and 250 kg ha-1rates. Phosphorus was applied as triple super phosphate (42-44 per cent P2O5) at 0, 50, 100 and 150 kg ha-1 rates. Fertilizers were broadcasted by hand. All of nitrogen rates increased dry matter yield and the yield reached the peak value at 200 kg ha-1 rate, followed by 150 and 250 kg Nha-1rates, but the differences among rates were not so great. All but 50 kg ha-1 nitrogen level increased crude protein content, but no differences among their effects. The effects of nitrogen rates on NDF values were the same and positive when compared with the NDF value of unfertilized range. All phosphorus rates did affect only the crude protein content of hay, indicating similar effects as a result; to produce higher and quality forage from abandoned rangelands like in the experimental region the 150 kg N ha-1rate can be recommended with economical considerations.
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