El-Shahat R.M , Sherif A.E.A and Faten M. Mohamed( 2014). Response of barley grown in saline soil to bio-fertilizer as a partial substitutive of mineral fertilizer.GJSR Journal. Vol. 2(5), pp. 144-153, 31 May, 2014 E-ISSN: 2311-732X
Abstract: Two field experiments wear designed concluded at the farm of Sahl Husseiniya Research Station. The main target of these experiments was to evaluate the response of barley to 75% NPK, bio-inoculation with Azolla (fresh, dry) and / mixture of halo-tolerant bacteria under saline soil conditions. The mixed bacteria mainly included, nitrogen fixers microorganisms as well as their enzymatic phytohormone, exo-polysaccharid and same enzymatic enzyme activity. High significant were estimated with treatment using (T10) 75% recommended dose of N, P and K + Azolla foliar + mixed bacteria two dose (30 and 60 days after sowing). Inoculation with mixed bacteria (two equal doses at 30 and 60 days of sowing) and Azolla enhanced the biological activity of the soil, and this trend was more pronounced in the treatments received T10. At the end of experiment after barley harvesting, salinity of the upper soil layer 30 cm decreased to be about 21.80 % from the initial soil. On the other hand, pH values decreased with the application of treatment from (T3) 75% recommended dose of N, P and K + Azolla dry to (T10) as foliar. Bio-fertilizer led to the increments in soil N, P and K available contents. The results indicated the import. The obtained results showed that, variation in available micronutrients content soil namely Fe, Mn, Zn and Cu, resulted from mineral –N and bio-fertilizer (Azolla and mixed bacteria) during both planting seasons. All the bio-fertilizers treatments recorded significant increases for grains and straw yield as compared with un-inoculated treatments control. The tested bio-fertilizers attained significantly high values for 1000 grains weight as compared with the control treatments. Treatment T10 reported high significant content and uptake of Fe, Mn, Zn and Cu of grains and straw.
Keywords: (Azolla, Halo-tolerant, Mixed bacteria, 75% N, P and K used, yield and yield component of barley, Saline soil.)
