Plant growth promoting characterization of indigenous phosphate solubilizing rhizobacteria and effects on germination of some crops in Vietnam

Inorganic Phosphate Solubilizing Bacteria (PSB) are widely present in nature and have been successfully applied fields many countries. However, researches on indigenous PSB still very limited Vietnam. The objective of this study was to isolate evaluate the growth promoting characteristics effects germination seed for fertilizer production from PSB. Thirteen isolates were collected using selective isolation medium containing Ca3(PO4)2, which eight added ability dissolve AlPO4 five FePO4. Initial qualitative tests indicated that all thirteen incapable HCN lipase while other activities including amylase, caseinase, cellulase, chitinase, pectinase, indole acetic acid, K solubility, Zn N fixation varied according isolate. had no effect rate, root length, hypocotyl length plantules soybean, rice, maize, cucumber, tomato, chili by plate assay. This shown also common rhizosphere various crops Therefore, enrich collection essential screening suitable strains subsequent production.