Tag Archives: Azospirillum brasilense

xxx P.P.P. Publio, A.J.V. Pires, I.C. Dutra, M.P. Sousa, G.C. Figueiredo, M.S. Nogueira, G.R.S. Oliveira, E.P.L. Ferreira, A.F. Santos, A.S. Ribeiro, P.H.S. Cardoso and W.N. Soares
Responses of Azospirillum brasilense on Brachiaria brizantha under different soil amendments
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Responses of Azospirillum brasilense on Brachiaria brizantha under different soil amendments

P.P.P. Publio, A.J.V. Pires, I.C. Dutra, M.P. Sousa*, G.C. Figueiredo, M.S. Nogueira, G.R.S. Oliveira, E.P.L. Ferreira, A.F. Santos, A.S. Ribeiro, P.H.S. Cardoso and W.N. Soares

State University of Southwest of Bahia, BR45700-000 Itapetinga, Bahia, Brazil
*Correspondence: mateuspereirampps@gmail.com

Abstract:

The objective of this study was to evaluate the responses of Brachiaria brizantha to inoculation with Azospirillum brasilense in different soil amendments. Four soil amendment treatments were evaluated (Control, liming, combination of NPK fertilizers and liming + combination of NPK fertilizers), associated or not with the inoculant Azospirillum, in a completely randomized design, with five replicates per treatment. The experimental units consisted of plastic pots with a capacity of 12 liters, which were filled with 10 dm³ of sandy clayey loam soil. For soil correction, higher productions were found for the variables SPAD indexes, chlorophyll b content, carotenoids and chlorophyll a/b ratio. The soil correction factor provided greater production of green matter, dry matter, and leaf area index when using liming with NPK when compared to the control treatment. There was an increase in root volume and weight for the type of soil correction. The use of liming and combination of NPK fertilizers promoted greater development of plant height, tiller density, stem and leaf elongation, quantity and average final leaf size. The use of Azospirillum brasilense inoculation associated with soil correction is recommended, as it provides positive responses on the production of the aerial part and roots of Brachiaria brizantha.

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1464-1472 E.R.T. Cruz, F.A. Teixeira, D.D. Fries, R.R. Jardim, N.T. Cruz, F. Rossa, A.P.S. Santos, E.M.V. Porto and H.S. Silva
Yield and morphology of Nopalea cochenillifera under N fertilization and biological inoculation
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Yield and morphology of Nopalea cochenillifera under N fertilization and biological inoculation

E.R.T. Cruz*, F.A. Teixeira, D.D. Fries, R.R. Jardim, N.T. Cruz*, F. Rossa, A.P.S. Santos, E.M.V. Porto and H.S. Silva

State University of Southwest of Bahia, BR45700-000, Itapetinga, Bahia, Brazil
*Correspondence: elitonrtdacruz@hotmail.com; teles.nc@gmail.com

Abstract:

The objective was to evaluate the effect of inoculation with Azospirillum brasilense and levels of nitrogen fertilization on the productive aspects of the spineless cactus (Nopalea cochenillifera). The experiment was carried in Ribeirão do Largo, Southwest region of the state of Bahia, from April 2019 to April 2020. The experiment was carried out in a 2×4 factorial, in a randomized block design with eight treatments and four replications. The treatments consisted of the absence or inoculation with Azospirillum brasilense and nitrogen fertilization levels 0, 50, 100 and 150 kg–¹ of N ha–¹. There was a positive effect for the use of the bacteria on cladode area index, height, number of secondary, tertiary and total cladodes, total weight for cladodes of all orders and also for final weight per ha–¹. There was a significant effect of the use of the inoculant for the levels of total soluble sugars and starch, where there was a decrease in the values for the treatments submitted to the use of the bacteria. There was a quadratic effect for the weight of the tertiary cladodes, number of tertiary cladodes and total of spineless cactus when submitted to nitrogen fertilization levels. There was a linear test for cladodes area index when nitrogen fertilization was used. The use of Azospirillum brasilense is positive for the cultivation of spineless cactus, improving development and increasing crop productivity.

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412-418 N. Mikhailouskaya and I. Bogdevitch
Effect of biofertilizers on yield and quality of long-fibred flax and cereal grains
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Effect of biofertilizers on yield and quality of long-fibred flax and cereal grains

N. Mikhailouskaya and I. Bogdevitch

Research Institute for Soil Science and Agrochemistry, Kazintsa 62, 220108 Minsk, Belarus;e-mail:brissa5@mail.belpak.by, bionf@yandex.ru

Abstract:

Application of biofertilizers provides the implementation of biological mechanisms of plant nutrition, growth promotion and protection. These are arguments for the use of biofertilizers as elements for nutrient management in organic agriculture, along with low cost and environmental safety. Azobacterin and Kaliplant were developed in Belarus. Natural N2-fixing bacteria are acting agents of Azobacterin. Kaliplant contains a natural strain of K-mobilizing bacteria. Both strains possess P-solubilization activity. The effects of biofertilizers on crop yield and quality were studied in field experiments on Luvisol soils. The contribution of biofertilizers for the crop yield increment varied in range from 8–30%. Azobacterin applications were most effective for barley and long-fibred flax. Kaliplant inoculations were mostly profitable for winter rye and winter triticale. Biofertilizers positively influenced crop production quality. Reliable increase of protein content and the improvement of amino acid composition in cereal grains were observed.

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