Nitrogen supply associated with rhizobacteria in the first productive cycle of Marandu grass

Sampaio, Fernando Antônio Rebouças; Filho, Marcelo Carvalho Minhoto Teixeira; Oliveira, Carlos Eduardo da Silva; Jalal, Arshad; Boleta, Eduardo Henrique Marcandalli; Lima, Bruno Horschut de; Rosa, Poliana Aparecida Leonel; Galindo, Fernando Shintate; Souza, Jeferson Silva de

doi:10.1007/s12892-021-00091-8

Cited by 9 publications

(4 citation statements)

References 24 publications

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“…In this case, the maximum NTP values, that is, 28.16 and 32.84 tillers per pot, are obtained with the doses 185.44 and 197.23 kg N ha -1 , respectively. U presented 25.88 tillers per pot under 100 kg N ha -1 , similar to what was found by Sampaio et al (2021) According to Sampaio et al (2021), nitrogen fertilization is essential to promote forage development, specifically tillering, regardless of inoculation. Nitrogen affects tiller density, as it is effective in activating the base buds, and stimulating tillering, as observed in this study (Alexandrino et al, 2010).…”

Section: Techniquessupporting

confidence: 82%

“…Inoculation and fertilization with N applied in a single dose do not influence DMP up to a dose of 150 kg N ha −1 in tropical soils with a high organic matter content (Hanisch et al, 2017). Sampaio et al (2021) analyzed nitrogen fertilization associated with inoculation and co-inoculation in Marandu grass and observed that the potential for N fixation by diazotrophic bacteria for doses higher than 100 kg N ha −1 can be reduced or even inhibited in the presence of high concentrations of the fertilizer in the soil, as it reduces the activity of the nitrogenase enzyme, responsible for transforming atmospheric N into ammonia.…”

Section: Techniquesmentioning

confidence: 98%

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Produção e características morfológicas de capim marandu sob inoculação e níveis de adubação nitrogenada

Codognoto,

Branco,

Rigo

et al. 2023

Sem. Ci. Agr.

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A produção e qualidade forrageira é influenciada pelo suprimento de nitrogênio, especialmente ureia, altamente sujeito a perdas por volatilização. Alternativamente, surge tecnologia que reduz a liberação de nitrogênio, restringindo as perdas pelo recobrimento do fertilizante com polímeros. Ainda, como possibilidade de reduzir a dependência externa de nitrogênio, decorre a combinação de microrganismos edáficos multifuncionais capazes de captar nitrogênio atmosférico e disponibilizá-lo às plantas forrageiras. Assim, objetivou-se avaliar inoculação de sementes e o uso de ureia revestida na produção de massa seca aérea e radicular e características morfológicas de capim Marandu (Urochloa brizantha cv. Marandu). Experimento em vasos foi organizado em delineamento inteiramente casualizado, com 4 repetições, em esquema fatorial 5 x 4 x 4. Foram empregadas 5 dosagens de adubação nitrogenada (50, 100, 150, 200 e 250 kg ha-1 de N), aplicado em dose única, utilizando o fertilizante sintético ureia. Os fatores constituíram 4 técnicas: adubação com ureia; adubação ureia revestida; sementes de capim Marandu tratadas com inoculante comercial e adubação com ureia; e, sementes de capim Marandu tratadas com inoculante comercial e adubação com ureia revestida. As observações (altura do dossel forrageiro; número de perfilhos por vaso; e, massa aérea de forragem) foram obtidas com frequência de 21 dias, totalizando quatro cortes avaliativos sequenciais. Massa seca de raiz foi obtida por medida única, no corte 4, organizado em esquema fatorial 5 x 4, com quatro repetições. Sob umidade adequada no solo, dosagem de 50 kg ha-1 de nitrogênio, utilizando ureia convencional, caracteriza provisão econômica e ambiental à altura do dossel de capim Marandu. Dosagem de nitrogênio até 200 kg ha-1 promove aumento no número de perfilhos e; dosagem igual e superior, asseguram manutenção do potencial de produção de massa de forragem por até 2 cortes. Ureia convencional viabilizou superior produção de massa de raízes de capim Marandu, nas dosagens de nitrogênio entre 150 e 250 kg ha-1.

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Section: Techniquessupporting

confidence: 82%

Section: Techniquesmentioning

confidence: 98%

Produção e características morfológicas de capim marandu sob inoculação e níveis de adubação nitrogenada

Codognoto,

Branco,

Rigo

et al. 2023

Sem. Ci. Agr.

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“…The mean CP content exceeded the desirable minimum of 7.0% for proper functioning of the rumen microbiota. According to Sampaio FAR et al [43], tropical grasses with CP content below 7.0% in the dry matter exhibit reduced digestibility due to inadequate nutrient levels in the plant.…”

Section: Bromatological Composition Of Marandu Grass Foragementioning

confidence: 99%

Combining Fully Acidulated Phosphates with Phosphate-Solubilizing Microorganisms for Urochloa brizantha Fertilization

Oliveira,

Peixoto,

Reis

et al. 2023

JEAI

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Aimed to evaluate the productive, morphological and nutritional characteristics, in addition to the accumulation of nutrients in the aerial part of Urochloa brizantha cv. Marandu subjected to phosphorus chemical sources and its interaction with phosphate-solubilizing inoculant. The experiment was developed in Colorado do Oeste, RO, Brazil, being adopted a randomized block design with three replications. The treatments consisted of different phosphate fertilizer doses associated or not with phosphate-solubilizing microorganisms (PSM): 0% P; 50% P; 100% P; 50% P + 250 mL ha-1 PSM; 50% P + 500 mL ha-1 PSM; 50% P + 750 mL ha-1 PSM; and 50% P + 1000 mL ha-1 PSM. Triple superphosphate was used as a chemical fertilizer, and fertilization with chemical fertilizer and PSM occurred on November 19th, 2021. The results for the morphological characteristics and yields of Marandu grass showed significant differences. The different arrangements and phosphate doses influenced the green matter yield and dry matter yield, both using the 50% P + 1000 mL ha-1 PSM presented higher yields (3,642.75 kg ha-1 and 1,049.10 kg ha-1, respectively). Higher crop growth rate results in green matter were also found when employing a combination of 50% P + 500 mL ha-1 PSM and 50% P + 1000 mL ha-1 PSM. Dry matter had a significant effect on the bromatological composition, with higher results observed when using 50% P alone (34.55%). Regarding the accumulation of nutrients in the aerial part, the highest P accumulation in Marandu grass was observed when utilizing 100% P, resulting in an accumulation of 15.4 kg P ha-1. Inoculation with PSM for fertilization of U. brizantha cv. Marandu grass does not have adverse effects on the increase in P availability to the plant, resulting in adequate yield and crop development associated with the productive potential of the area.

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“…Rhizobacteria are well known advantageous soil microbes that can influence plant growth directly or indirectly ( Vacheron et al, 2013 ). They can have direct influence on plant ability to fix atmospheric nitrogen and make better use of potassium and phosphates ( Sampaio et al, 2021 ). In this way, they work as growth regulators, encouraging better root growth, improved seed germination and higher yield ( Glick, 2012 ; Rehman et al, 2020 ).…”

Section: Biological Controlmentioning

confidence: 99%

Neocosmospora rubicola, a stem rot disease in potato: Characterization, distribution and management

Riaz

Akhtar²,

Msimbira³

et al. 2022

Front. Microbiol.

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Potato (Solanum tuberosum L.) is one of the most important crops in maintaining global food security. Plant stand and yield are affected by production technology, climate, soil type, and biotic factors such as insects and diseases. Numerous fungal diseases including Neocosmospora rubicola, causing stem rot, are known to have negative effects on potato growth and yield quality. The pathogen is known to stunt growth and cause leaf yellowing with grayish-black stems. The infectivity of N. rubicola across a number of crops indicates the need to search for appropriate management approaches. Synthetic pesticides application is a major method to mitigate almost all potato diseases at this time. However, these pesticides significantly contribute to environmental damage and continuous use leads to pesticide resistance by pathogens. Consumers interest in organic products have influenced agronomists to shift toward the use of biologicals in controlling most pathogens, including N. rubicola. This review is an initial effort to carefully examine current and alternative approaches to control N. rubicola that are both environmentally safe and ecologically sound. Therefore, this review aims to draw attention to the N. rubicola distribution and symptomatology, and sustainable management strategies for potato stem rot disease. Applications of plant growth promoting bacteria (PGPB) as bioformulations with synthetic fertilizers have the potential to increase the tuber yield in both healthy and N. rubicola infested soils. Phosphorus and nitrogen applications along with the PGPB can improve plants uptake efficiency and reduce infestation of pathogen leading to increased yield. Therefore, to control N. rubicola infestation, with maximum tuber yield benefits, a pre-application of the biofertilizer is shown as a better option, based on the most recent studies. With the current limited information on the disease, precise screening of the available resistant potato cultivars, developing molecular markers for resistance genes against N. rubicola will assist to reduce spread and virulence of the pathogen.

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Nitrogen supply associated with rhizobacteria in the first productive cycle of Marandu grass

Cited by 9 publications

References 24 publications

Produção e características morfológicas de capim marandu sob inoculação e níveis de adubação nitrogenada

Produção e características morfológicas de capim marandu sob inoculação e níveis de adubação nitrogenada

Combining Fully Acidulated Phosphates with Phosphate-Solubilizing Microorganisms for Urochloa brizantha Fertilization

Neocosmospora rubicola, a stem rot disease in potato: Characterization, distribution and management

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