Amendoim inoculado com rizóbio e coinoculado com Azospirillum brasilense em solo com e sem compactação
Data
2018-07-12
Autores
Neves, Laura Cristina Rezende das
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Universidade Federal de Mato Grosso
Resumo
Peanut is a legume rich in oil, vitamins, proteins, minerals, and is used for various
purposes. Studies for this crop are important to verify the degree of adaptation and
the productive capacity of the peanut when subjected to some stress, such as
compaction. Compaction causes a number of problems, such as hinders the
absorption of water and nutrients by plants. An alternative to minimize the impacts of
this process is the use of nitrogen-fixing microorganisms and plant growth promoters,
with the purpose of evaluating whether isolated or combined inoculation could bring
beneficial effects to peanuts in compacted soil. The objective of this study was to
verify the effect of inoculation with rhizobia and the co-inoculation with Azospirillum
brasilense on peanut cultivated in Cerrado Oxisol with and without compaction. The
experiment was conducted in a greenhouse in a randomized block design in a 5x2
factorial scheme, with 4 replications, totaling 40 vessels. The treatments were
composed of commercial peanut inoculant (Bradyrhizobium elkanii, strain SEMIA
6144); strain MT 15 (Rhizobium tropici); MT 15 + commercial inoculant with A.
brasilense; nitrogen control and absolute control (without NPK and micronutrients
and without inoculation) in soil with and without compaction. The variables analyzed
were plant height, leaf number, number of branches per plant, stem diameter, Falker
chlorophyll index, shoot dry weight, root dry matter per layer and total dry mass, dry
mass ratio aerial part by root dry matter, root volume per layer and total, number and
dry mass of nodules per layer and total, number of pods, number of grains, dry mass
of the grains, nitrogen concentration in shoot and in the grains, crude protein and
accumulation of nitrogen in the aerial part and in the grains. The data were submitted
to analysis of variance and when significant to the Tukey test up to 5% of probability
by means of the SISVAR Statistical Program. The inoculation with the MT15 strain
and the co-inoculation with A. brasilense provided the peanut crop with good
performance in relation to the phytometric characteristics, productive and related to
the biological nitrogen fixation efficiency in compacted and uncompacted soil.
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NEVES, Laura Cristina Rezende das. Amendoim inoculado com rizóbio e coinoculado com Azospirillum brasilense em solo com e sem compactação. 2018. 122 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2018.