scholarly journals Initial growth in maize in compliance of Azospirillum brasilense inoculation and nitrogen rates

2017 ◽  
pp. 1242-1248 ◽  
Author(s):  
Elisa Pereira de Oliveira ◽  
Matheus Gustavo da Silva ◽  
Paulo Eduardo Teodoro
2019 ◽  
Vol 43 ◽  
Author(s):  
Mauricio Pase Quatrin ◽  
Clair Jorge Olivo ◽  
Gabriela Descovi Simonetti ◽  
Vinicius Felipe Bratz ◽  
Guilherme Librelotto de Godoy ◽  
...  

ABSTRACT The use of inoculants containing plant growth-promoting bacteria is an alternative to increase the efficiency of nitrogen fertilizers. Studies evaluating the effects of inoculation on forage yield, straw yield, and grain yield in dual-purpose wheat cultivars are scarce. This study aimed to evaluate the forage yield and grain yield in dual-purpose wheat inoculated with Azospirillum brasilense and fertilized with increasing nitrogen rates during two agricultural years (2016-2017) under cutting management. The trial was carried out in a completely randomized block design with four replicates, using a 2 x 4 factorial arrangement. The factors were the inoculation (control or A. brasilense) and nitrogen rates (0, 50, 100 and 150 kg ha-1 of N). Forage, grain and straw yield, and number of tillers were evaluated. Forage yield differed between treatments with inoculation and without inoculation, 3952 and 3350 kg DM ha-1, respectively. There was no effect of inoculation on grain yield. The forage and leaf biomass yield, the number of tillers and straw yield increased with inoculation.


2019 ◽  
Vol 6 (3) ◽  
pp. 53-59 ◽  
Author(s):  
Gabriel Felipe Vogel ◽  
Rubens Fey

The application of biological products containing diazotrophic bacteria in the seed has been highlighted as an alternative to reduce the use of nitrogen fertilizers; however, the chemical treatment of the seeds may negatively affect the survival rate of these microorganisms in the soil. The effects of the application of captan (fungicide) and thiodicarb (insecticide) in association with the inoculation of Azospirillum brasilense were investigated in this study for the corn crop. The research was conducted under greenhouse conditions at Universidade Estadual do Centro-Oeste (UNICENTRO), in Guarapuava, Paraná, Brazil, and under laboratory conditions at the Universidade Federal da Fronteira Sul (UFFS), in Laranjeiras do Sul, Paraná, Brazil. A completely randomized experimental design with eight treatments and four replicates was used. The treatments were as follows: control; A. brasilense; captan; thiodicarb; captan + thiodicarb; A. brasilense + captan; A. brasilense + thiodicarb; A. brasilense + captan + thiodicarb. The germination and seedling growth rates were evaluated in the laboratory. In the greenhouse were measured the growth of the roots and shoots until the V8 corn growth stages. The use of A. brasilense alone resulted in higher plant growth when compared to the control treatment, whereas the association of A. brasilense with captan and thiodicarb resulted in a similar response to the uninoculated and control treatments. These results suggest that there was a possible toxic effect of seed treatment with these products. The use of captan and thiodicarb interfere in the interaction of diazotrophic bacteria with root growth, affecting the germination rate and initial corn growth.


Revista CERES ◽  
2016 ◽  
Vol 63 (3) ◽  
pp. 394-402
Author(s):  
Michelle Traete Sabundjian ◽  
Orivaldo Arf ◽  
Flávio Hiroshi Kaneko ◽  
Flávia Constantino Meirelles ◽  
Marcelo Valentini Arf ◽  
...  

RESUMO A produção de trigo no cerrado brasileiro enfrenta grandes desafios, principalmente por não ser a região tradicionalmente tritícola e pela ocorrência de inverno quente e seco. Assim, o objetivo deste trabalho foi avaliar o efeito residual das culturas antecessoras, milho e Urochloa ruziziensis (R. Germ & Evrard), em cultivo exclusivo e em consórcio entre ambas, na presença e ausência da inoculação de sementes com Azospirillum brasilense e adubação nitrogenada (N) em cobertura, no desenvolvimento e na produtividade do trigo. O experimento foi desenvolvido em Selvíria, MS, em 2011/12. O delineamento experimental foi o de blocos ao acaso, disposto em esquema fatorial 8x4, com quatro repetições, cujos tratamentos foram constituídos pela combinação de restos culturais (associações de milho, Urochloa ruziziensis e Azospirillum brasilense) e doses de N (0, 30, 60 e 90 kg ha-1) em cobertura, no trigo. Realizaram-se as seguintes avaliações: cobertura vegetal residual (quantidade), características agronômicas, componentes de produção e produtividade da cultura do trigo. As culturas antecessoras apresentaram efeitos positivos na produtividade do trigo cultivado em sucessão, sendo o consórcio de milho e Urochloa ruziziensis, com ou sem inoculação excelente opção de manejo; o incremento da dose de N, em cobertura, até 90 kg ha- 1 aumenta a produtividade de grãos de trigo irrigado, dependendo da cultura antecessora.


2019 ◽  
Vol 111 (4) ◽  
pp. 1985-1997 ◽  
Author(s):  
Fernando S. Galindo ◽  
Marcelo C. M. Teixeira Filho ◽  
Salatiér Buzetti ◽  
Paulo H. Pagliari ◽  
José M. K. Santini ◽  
...  

2021 ◽  
pp. 1-17
Author(s):  
Fernando Shintate Galindo ◽  
Paulo Humberto Pagliari ◽  
Salatiér Buzetti ◽  
Willian Lima Rodrigues ◽  
Guilherme Carlos Fernandes ◽  
...  

Author(s):  
Osvaldo Matsuo ◽  
Claudemir Zucareli ◽  
Eduardo H. Horácio ◽  
Luiz A. R. Alves ◽  
Otavio J. G. A. Saab

ABSTRACT Although the isolated effects of the cyanobacteria Anabaena cylindrica and the bacteria Azospirillum brasilense are well-known, the co-inoculation of both can promote other benefits to corn plants’ biological nitrogen fixation and growth. The aim was to evaluate the initial growth and chloroplast pigment levels of corn hybrids co-inoculated with A. brasilense and A. cylindrica. The experiment was conducted in greenhouse conditions using the completely randomized design in a factorial scheme 2 × 4 with two hybrids, Balu 184 and Balu 280 Pro, and four inoculation treatments: no inoculation, inoculation of A. cylindrica, inoculation of A. brasilense, and the co-inoculation of A. cylindrica + A. brasilense. Co-inoculation resulted in higher root growth and dry mass of the aerial part in both hybrids; however, the hybrid Balu 280 Pro presented higher responsivity. The co-inoculation of A. brasilense and A. cylindrica increased initial corn growth without altering the photosynthetic pigment levels.


2020 ◽  
Vol 23 (5) ◽  
pp. 461-468
Author(s):  
Carlos Eduardo da Silva Oliveira ◽  
Tiago Zoz ◽  
Eduardo Pradi Vendruscolo ◽  
Agner de Freitas Andrade ◽  
Cássio de Castro Seron ◽  
...  

Revista CERES ◽  
2018 ◽  
Vol 65 (5) ◽  
pp. 407-414 ◽  
Author(s):  
Rodrigo Luiz Ludwig ◽  
Thomas Newton Martin ◽  
Jessica Deolinda Leivas Stecca ◽  
Vinícius dos Santos Cunha ◽  
Ubirajara Russi Nunes ◽  
...  

ABSTRACT The agronomic efficiency of the nitrogen-fixing inoculants or growth promoters depends on the growing conditions of the crops. One of the factors that may influence this response is the interaction between the bacteria present in the inoculant with the chemical treatment applied to the seeds. The objective of this study was to evaluate the influence of inoculation of wheat seeds with Azospirillum brasilense and its interaction with seed treatment on germination, vigor and initial growth of wheat plants of four cultivars. So, an experiment was carried out at the Federal University of Santa Maria, Santa Maria-RS. The experimental design was a completely randomized in a three-factorial (4x4x2), represented by the combinations between cultivar (FUNDACEP Bravo, OR/TBIO Quartzo, TBIO Itaipu e BRS 331), chemical treatment (1: Insecticide + Fungicide; 2: Insecticide; 3:Fungicide; 4: Witness without treatment) and Azospirillum brasilense inoculation (with and without inoculant). The determinations which were carried out were the following: emergence in beds, first germination test counting (vigor), germination, seedling length (root, aerial part and total), dry mass (root and aerial part). The responses to inoculants with Azospirillum brasilense are closely related to the cultivars used in the study. The treatment of seeds with fungicide and insecticide presented a phytotoxic effect, damaging the initial growth of the seedlings.


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