The Effect of Different Nitrogen Concentration and Cutting Frequency on Some Quality Characters of Two Sorghum (Sorghum bicolor L. Moench) Varieties


  • Tara Abubakr Mohammed Department of Field Crops, College of Agricultural Engineering Sciences, Salahaddin University-Erbil, Kurdistan Region, Iraq
  • Namam Bahram Ismael Department of Field Crops, College of Agricultural Engineering Sciences, University of Salahaddin, Erbil, Kurdistan Region, Iraq



Key words: Sorghum; Nitrogen; Forage; Protein; Quality.



    This investigation was carried out at two locations the first location was college of Agricultural Engineering Sciences / Salahaddin University at Grdarasha research and the second location was Kurshaxlu station during summer season 2021 to assess the effect of three levels of nitrogen (0,50 and 100) kg ha-1 and two different cutting frequency (once and twice), applied on two sorghum varieties; (Money Maker and Jowari) to investigate some quality characters (crude protein %, crude fiber %, ether extraction %, ash % and total carbohydrates %). Jowari variety had highest protein % than money maker, (13.211 and 13.095) (%) and at nitrogen 100 kg ha-1. The results showed that the fiber content were decreased and carbohydrates increased in Jowari variety with the nitrogen concentration 50 kg ha-1. Cutting twice recorded lower fiber content and higher carbohydrates percentage than cutting once. More studies might conduct to determine the effect of nitrogen applications on growth and quality of sorghum by using different rates.


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