The Effect of Bio-Fertilization With Azotobacter Spp and Different Rates of Urea Fertilizer on the Growth of Barely

Merfat T. Ben Mahmud*(1) and Eman A. Elferjani(1)

(1). Department of Soil and Water, Faculty of Agriculture, Tripoli University, Tripoli, Libya.

(*Corresponding author: Dr. Merfat T. Ben Mahmud. Email:

Received: 03/01/ 2016                                     Accepted: 24/01/ 2016


Pots experiment of grown Barely Hordeum, was inoculated with Azotobacter species, isolated from Wadi Elrabie soil (Tajura)/Libya, (loam sandy soil,  pH=8.6),  that live free in soil and it has a high ability to impact on the growth of barley plants. This experiment was carried out during the winter seasons of 2014, to evaluate the effect of Azotobacter species inoculums and four levels (0, 50, 100 and 150 kg/ha) of nitrogen fertilizer (Urea 46% N), on barley growth and number of cell density bacterial in rhizosphere area (CFU). The results proved that bio-fertilization with Azotobacter had a positive role in increasing dry weight of shoot and root (g), and the growth of the number of cell density bacterial (CFU), which had a positive effect, with the addition of 100 kg N / ha of urea.

Key words: Azotobacter, Urea, Rhizosphere, Barely

Full paper in Arabic:

تأثير التسميد الحيوي ببكتريا Azotobacter  Spp ومعدلات مختلفة من سماد اليوريا في نمو نبات الشعير