A greenhouse experiment was carried out using a randomized complete block design (RCBD) with three replicates in the experimental farm station of Fac. Agric. at Moshtohor during 2011 season. This research aims to study the effect of tomato inoculation with salt-tolerant plant growth promoting rhizobacteria (PGPR) strains Pseudomonas fluorescence D23, Bacillus pumilus D139 and Azospirillum lipoferum D178 in combination with humic acid and organic manure (compost) on growth performance and chemical composition of tomato under saline stress. Obtained results revealed that the highest significant of growth characters was observed in case of tomato inoculated with biostimulant combined with compost at one and half dose in presence of humic acid. Tomato inoculated with biostimulant combined with compost at one and half dose in presence of humic acid gave the highest significant values of total sugars, total amino acids, titratable acidity, vitamin C , total soluble solids, total and conjugated phenols .Whereas, the highest values of free phenols were observed when tomato inoculated with biostimulant combined with compost at full dose in presence of humic acid. On the other hand, soil amended with biostimulant combined with humic acid gave higher records of chlorophyll A & B, total chlorophyll and carotenoids than soil treated with compost at different doses in combination with biostimulant.
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