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ENVIRONMENTAL AND AGRICULTURE APPLICATIONS OF PGPR’S STRAINS ISOLATED FROM ZEA MAYS L. RHIZOSPHERE

AUTHOR/S: STEFAN, M., RAUS, L., AILIESEI, O., UNGUREANU, E., MANIU, C., DUNCA, S.
Sunday 1 August 2010 by Libadmin2005

5th International Scientific Conference - SGEM2005, www.sgem.org, SGEM2005 Conference Proceedings/ ISBN: 954-918181-2, June 13-17, 2005, 281- 286pp

ABSTRACT

Considering the benefits of intensive agriculture in our time and the negative impact of
chemical fertilizers and pesticides against the environment, usage of PGPR (plant growthpromoting
rhizobacteria) like biofertilizers is one of the most promising biotechnology used
for growing the primary production with less quantity of chemical fertilizers. The usage of
PGPR may be an alternative to organic fertilizers and can reduce the pollution and preserve
the environment in the spirit of practicing an ecological agriculture. In this context it was
analyzed the influence of some rhizospheric bacteria in maize development and the impact on
the productivity in conditions of unapplying organic fertilizers. Accordingly of using PGPR,
the foils number mean value was greater at the probe in regard to the control. The inoculated
bacteria strains determine modification of assimilation pigments content, with positive
influences on the respiration processes (photosynthesis) and implicitly on growth of maize plant development. Without organic fertilizers, usage the PGPR may cause a productivity
increase/ha by 16.28 %.