title: Impact of rock materials and biofertilizations on P and K availability for maize (Zea Maize) under calcareous soil conditions.
abstract: The present work evaluated the synergistic effects of soil fertilization with rock P and K materials and co-inoculation with P and K-dissolving bacteria [PDB (Bacillus megaterium var. phosphaticum) and KDB (Bacillus mucilaginosus and B. subtilis)] on the improvement of P and K uptake, P and K availability and growth of maize plant grown under limited P and K soil conditions (calcareous soil). The experiment was establishment with eight treatments: without rock P and K materials or bacteria inoculation (control), rock P (RP), rock K (RK), RP + PDB, RK + KDB and R(P + K)+(P + K)DB. Under the same conditions of this study, co-inoculation of PDB and KDB in conjunction with direct application of rock P and K materials (R(P + K)) into the soil increased P and K availability and uptake, and the plant growth (shoot and root growth) of maize plants grown on P and K limited soils.
authors: Department of Soil and Agriculture Chemistry, Faculty of Agriculture, Saba Basha, Alexandria University, Egypt ; The National Plan for Sciences and Technology, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
authors: I I
authors: II
authors: Abou-El-Seoud
authors: A
authors: A
authors: Abdel-Megeed
keywords: Maize plant; Phosphate and potassium solubilizing bacteria; Rock P and K
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