The study of the paper about the
rhizosphere in the transformation of nitrogen compounds can generate knowledge
of the microbial and biochemical atmosphere of the rhizosphere of wheat, for
the understanding of the dynamics of the N in agricultural zones, with the
purpose of optimizing the fertilizer use and increasing the productivity of the
cultures. Therefore, the objective of the present work was to know the effect
the rhizosphere in the dynamics of the bacterial populations that take part in
the cycle of the N in wheat nourished with slow release fertilizer and one
commercial, irrigated with waste water or well. Analyses in the soil took place
vertisol used in the experiment with the rhizospheric and non rhizospheric
fraction. The slow release fertilizer used has a matrix enriched with N and P
and is in the process of being patented (it explains in materials and methods).
Each fertilizer was evaluated and the combination of the slow release
fertilizer with organic fertilizer. The technique of the number most probable
was used (MNP) to carry out the quantification of the nitrificants and
denitrificants bacteria to the 55, 67 and 97 days after sowing (Dds). The
results obtained for the MNP of denitrificants bacteria and Nitrosomonas indicate that the effect
average of the types of water, soil and fertilizers, as well as their
interaction to each other was not significant (p > 0.05). The effect of the
fertilizing type and soil (rhizospheric and non rhizospheric) in the MNP of Nitrobacter was significant (p < 0.05).
The tendencies show that the non rhizospheric soil is more favorable for the
development of denitrificants bacteria and Nitrobacter,
whereas the MNP of Nitrosomonas was
greater in rhizospheric soil.
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