Effect of Nitrogen Fertilization Rates on Some Physiological Properties of Barley Crop (Hordeum vulgare L.) in Marwa and Al-Wasitah Regions in Al-Jabal Al-Akhdar, Libya.
DOI:
https://doi.org/10.54172/mjsc.v34i2.86Keywords:
Barley, Physiological behavior, Nitrogen levelsAbstract
The aim of this study is to investigate the barley crop (Hordeum vulgare L.) behavior in different environments to the levels of nitrogen added in the form of urea 46%. A field experiment was conducted in the areas of Marawah, south of Al-Jabal Al-Akhdar, and Wesata which are located at ̊21 2̀4 , ̊21 3̀9 North , ̊32 2̀0 , ̊32 4̀7 East, and 508 , 185 m above sea level for both sites respectively, to study the effect of nitrogen levels (0, 50, 100 and 150 kg ha¹) on some of the growth traits of barley( c.v Rehan) sown in the rate of 70kg ha¹ by drilling (15cm apart) during the growing season 2014/15. The experiment was laied out in RCBD by 4 replicates with 25m² for each. The results showed significant differences in crop growth rate (CGR), relative growth rate (RGR), photodegradation (NAR), leaf area index (LAI) with 150 kg / h. Sustainable yield (BMD) significantly increased with the addition of 100 kg / h compared to non-fertilization in both study sites. leaves chlorophyll a , b and total content responsed to nitrogen levels by significant increase (P<0.01) in chl a in both sites and at Wesataincase of chl b and total , meanwhile chl b and total were not affected by nitrogen levels in Marawa.
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