Abstract

Two experimental trials were carried out in Kafr El-Sheik Governorate in clay soil condition during the winter seasons of 2018 and 2019 to study the effect of phosphorus solubilizing microorganisms (Bacillus megaterium var. phosphaticum and Trichoderma harzianum) with different forms of chemical compounds (P and Ca) on growth, yield and fruit quality of tomato (Lycopersicon esculentum Mill.) cv. Castle Rock and their interaction on vegetative growth characters, yield and yield components, fruit quality and leaf chemical constituents. Increased performance in vegetative growth parameters, lesser blossom-end rot (%), high calcium and N content in fruit tissues and also higher Ca contents in leaves with application of Ca-chelate combined with Egyptian Rock Phosphate (ERP) or calcium superphosphate was observed along with application of B. megaterium var. phosphaticum addition followed by T. harzianum.