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Advisor(s)
Abstract(s)
According to the United Nations predictions, the human population will reach 9 billion people by 2050, being imperative an increase in food supply. Phosphorus (P) is a limiting factor in crop growth and, due to its low availability, P-deficiency in soils is widespread, and as such the successive application of P-fertilizers to maintain crop production has occurred (Sharma et al., 2013), leading to severe environmental problems. Microbial mediated P management appears as an eco-friendly tool for agricultural sustainable practices. The harnessing of Phosphate Solubilizing Bacteria (PSB) seems to be of utmost importance towards the reverse of the current use of large amounts of P fertilizers, since they can stimulate plant growth in particular through the conversion of bound P in soil into bioavailable P forms (Pereira and Castro, 2014).
This work aimed to evaluate the ability of phosphate-solubilizing bacteria (PSB) to enhance Zea mays growth in an agricultural P-deficient soil. Strains were screened for their ability to solubilize P and to produce plant growth promoting (PGP) substances. The best P-solubilizing strains Rhodococcus sp EC35 (B1), Pseudomonas sp. EAV (B2) and Arthrobacter nicotinovorans EAPAA (B3) were inoculated in maize plants growing in P-deficient soils without P fertilization and amended with soluble (KH2PO4) and with tricalcium phosphate (TCP).
Description
Keywords
bioinocula agricultural soil phosphorus maize
Citation
PEREIRA, S. I. A.; CALHEIROS, C. S. C.; CASTRO, P. M. L. - Bioinocula application in maize plants growing in a P-deficient agricultural soil. – In 6th International Symposium on Wetland Pollutant Dynamics and Control, Cranfield, United Kingdom, 13-18 September 2015 – In (DOTRO, Gabriela and GAGNON, Vincen Eds.). Book of Abstracts of the 6th International Symposium on Wetland Pollutant Dynamics and Control. (pp: 392-393), 2015