Feijão caupi submetido à inoculação com rizóbio e cultivado em latossolo do cerrado matrogrossense
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Data
2013-12-03
Autores
Frigo, Gislane Renata
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Universidade Federal de Mato Grosso
Resumo
This study aimed to evaluate the productive characteristics of
cowpea inoculated with rhizobia strains and grown in Oxisol of the Cerrado of
Mato Grosso. Two experiments in laboratory and the other in the field were
performed. The laboratory experiment consisted of phenotypic analysis of
rhizobia which were used as inocula. The experiment was conducted in the
experimental farm of the Federal University of Mato Grosso, campus
Rondonópolis - MT, in a randomized complete block design with seven
treatments, five strains of Rhizobium (four belonging to the culture collection
of UFMT, and a commercial strain BR 3267), a witness to nitrogen
fertilization (75 kg N ha - 1) and a control (without inoculation or mineral
fertilization), with six replicates, totaling forty two experimental units . At 40
days after sowing (DAS ) were collected from six plants of the floor area of
each plot to determine the variables plant height, dry weight of shoots and
roots, total dry weight, number of nodules, nodule dry mass and SPAD
reading and total N of roots and shoots. In corresponding to the seed
formation, at 60 DAS, period SPAD reading was performed again. At the end
of the cycle relative efficiency of strains of rhizobia, weight of hundred grains,
total N of shoots and roots of grain and crude protein were evaluated . Data
were subjected to analysis of variance and the means were compared by
Tukey test at 5 % probability, using the statistical analysis program SISVAR.
The results of the laboratory experiment were acceptable for all five strains
tested, all developed well in relation to the parameters analyzed. Regarding
the strains used in the field experiment showed that the best results for
number of nodules was the C15 strain, for the determination of nitrogen in
plant tissue and grain, the strain that obtained the most satisfactory results
was the strain RZ23. The commercial strain BR3267 showed greater dry
mass of shoots and roots. Already nitrogen control presented higher means
for SPAD readings at 40 DAS, plant height of dry mass of shoot and total.14
Inoculation with rhizobia strains contributed to the development of cowpea
grown in the Cerrado of Mato Grosso.
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FRIGO, Gislane Renata. Feijão caupi submetido à inoculação com rizóbio e cultivado em latossolo do cerrado matrogrossense. 2013. 69 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2013.