Doses de Inoculante Bradyrhizobium japonicum em Três Cultivares de Soja no Norte de Mato Grosso

Pereira, Cassiano Spaziani; Buosi, Igor Buosi; Zonta, Luiz Henrique; Lange, Aderson; Firorini, Ivan Vilela

doi:10.14688/1984-3801/gst.v9n1p76-88

Cited by 5 publications

(9 citation statements)

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“…So, we verified that the complementary application of liquid inoculant via foliar provides increases in soybean productivity. These results are corroborate those observed by Pereira et al [8], in a research evaluating different doses of inoculant in soybean cultivars, in which was verified that the productivity correlated with the formation of nodules and dry mass, showing increasing as a function of inoculant dose.…”

Section: Discussionsupporting

confidence: 92%

“…The dilution of the inoculant in the water, for post-emergence application under soybean cultivation, possibly improved the distribution of rhizobium on the soil surface, which favored by the adequate humidity, promoted an efficient infection of the roots of the plants, especially those more superficial, found in the first layers of soil. It should be noted that higher doses, besides providing a larger number of B. japonicum cells, near the adventitious roots [8], promoted an increase in nodulation, and consequently, superior results in productivity, as well as other agronomic characters presented above. Thus, the observed increases in productivity are closely correlated with nodule formation.…”

Section: Discussionmentioning

confidence: 94%

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Complementary Application of Inoculant in Post-emergence on Soybean Crop

Henrique

Pereira

Rosalino

et al. 2019

JEAI

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Objective: Inoculation is an important agricultural practice in soybean cultivation that guarantees high productivity without the external input of nitrogen. The objective of this study was to evaluate if the complementary of liquid inoculant (Bradyrhizobium japonicum), via leaf, in different times and different application rates, affects the nodulation, plant growth and soybean productivity. Study design: A randomized complete block design (RCBD) was used, with four replications, in a 5x3 factorial scheme, evaluating the complementary inoculant application, via foliar (0; 75; 150; 225 e 300 mL ha-1), in three stages of vegetative development of the crop (V2, V4 e V6). Location and duration of the study: The study was performed in a commercial area, in the municipality of Sinop, in the northern of Mato Grosso State, between October 2017 and February 2018. Methodology: The cultivation was in soil classified as Red-yellow Latosol with of clayey texture, was in a direct seeding system, using the cultivar NS7901RR. The seeds used were treated and inoculated at sowing, with turfous inoculant and liquid. The experimental units received the complementary applications of inoculant, via pulverization, at 15, 21 and 28 days after emergence, according to the treatment. Results: It was verify that the different times of application of foliar inoculant, does not condition significant differences to the parameters measured in this study. The complementary inoculant application affected, significantly, the leaf chlorophyll index (P <0.05), as well as the dry matter mass of the plants (P <0.001). Up to 300 mL ha-1, a gradual increase in grain yield was verified. Conclusion: The complementary supply of liquid inoculant (B. japonicum), via foliar, in different rates application, affects the nodulation and development of the plants and the productive yield of the crop.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 94%

Complementary Application of Inoculant in Post-emergence on Soybean Crop

Henrique

Pereira

Rosalino

et al. 2019

JEAI

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“…Todos os tratamentos tiveram acréscimo nos valores de clorofiloG® com aumento nas doses de inoculante. Outros autores não verificaram alterações nos valores do índice de clorofila com a aplicação inoculação [12]. Porém [9], verificaram, assim como nesse trabalho aumento nos valores das leituras do teor de clorofila associando-os a aumentos nos teores de N foliar.…”

Section: Resultados E Discussõesunclassified

“…Em relação a este resultado devem-se levar em consideração alguns fatores, em primeiro lugar atentar para a viabilidade dos nódulos que se formaram [12], citam a importância da viabilidade dos nódulos para assimilação de N pelas plantas, muitas vezes os nódulos estão presentes, mas não viáveis, sendo na realidade parasitas e não fornecedores de N.…”

Section: Foliarunclassified

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Modos e doses de aplicação de inoculante na cultura da soja

et al. 2019

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A inoculação é considerada uma das práticas mais importante na cultura da soja. O objetivo do trabalho foi verificar o efeito de diferentes doses de inoculante com Bradyrhizobium japonicum sob diferentes modos de aplicação. O delineamento experimental utilizado foi em blocos casualizados completos (DBC) com 4 repetições em esquema experimental fatorial 4 x 3, totalizando 12 tratamentos. As doses foram: 0; 400; 800 e 1200 mL de inoculante 50 kg-1 de sementes ou mL ha-1 quando o inoculante foi aplicado na cobertura. Os três modos de aplicação foram: via semente (semeadura), via pulverização foliar no estádio em V2 e diretamente no solo com a adição de 50 g de gelatina bovina em 4,0 L água-1 no estádio V2. A cultivar semeada foi a LG 60174 IPRO. Os tratamentos feitos com a gelatina bovina e ágar foram os que obtiveram os melhores resultados em altura de plantas, diâmetro de caule, número de folhas, área foliar, teor de clorofila, e massa seca da parte aérea, apresentando as maiores médias no crescimento vegetativo das plantas. A aplicação via semente atingiu as maiores médias de número de nódulos e na massa seca de nódulos, devido principalmente à proximidade da bactéria com a semente. Acredita-se que as gelatinas possam ter mantido a umidade do solo mais alta.

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Inoculation and co-inoculation of Bradyrhizobium japonicum and Azospirillum brasilense in soybean crop with the use of soil bio-activator

Röske¹,

Guimarães²,

Brito³

et al. 2022

Commun. Plant Sci.

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In view of the high nitrogen availability required by soybean, inoculation with nitrogen fixing bacteria, such as Bradyrhizobium japonicum, is an economically viable option. Moreover, the co-inoculation of these microorganisms with plant growth promoting bacteria, such as Azospirillum brasilense, presents high efficiency compared to the isolated use of these microorganisms. Given the above, the study aimed to determine the effects of applying a soil bio-activator associated with the inoculation of Bradyrhizobium japonicum and Azospirillum brasilense bacteria, on morphometric, physiological and productive variables of soybean crop. The experiment was conducted in the field, in a randomized block design with four replicates. The treatments were: control; seed inoculation with Bradyrhizobium japonicum; seed inoculation with Azospirillum brasilense; application of soil bio-activator; seed inoculation with B. japonicum and A. brasilense; seed inoculation with B. japonicum and application of soil bio-activator; seed inoculation with A. brasilense and application of soil bioactivator; and seed inoculation with B. japonicum and A. brasilense and application of soil bioactivator. In the morphometric analysis, plants inoculated with B. japonicum presented a greater number of nodules compared to the control. The co-inoculation associated with use of soil bio-activator increased the chlorophyll relative content, at the beginning of the cycle, in 6.37% in relation to the control. In gas exchange analysis, the isolated use of soil bio-activator obtained higher intrinsic water use efficiency (iWUE) in V4. No increases in relation to the control were observed in the other variables evaluated, rejecting the hypothesis that coinoculation associated with the use of soil bio-activator would promote increases in morphometric, physiological and productive characteristics of the soybean crop. Highlighted Conclusion1. The use of soil bio-activator associated with inoculation and coinoculation of Bradyrhizobium japonicum and Azospirillum brasilense does not provide increases in morphometric, physiological, and productive variables of the soybean crop. 2. Further studies are needed on the influence of soil bio-activators on the bacteria used in this study, enabling further verification of their applicability.

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Doses de Inoculante Bradyrhizobium japonicum em Três Cultivares de Soja no Norte de Mato Grosso

Cited by 5 publications

References 0 publications

Complementary Application of Inoculant in Post-emergence on Soybean Crop

Complementary Application of Inoculant in Post-emergence on Soybean Crop

Modos e doses de aplicação de inoculante na cultura da soja

Inoculation and co-inoculation of Bradyrhizobium japonicum and Azospirillum brasilense in soybean crop with the use of soil bio-activator

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