Eficiência nutricional da soja RR na ausência do glifosato

Gonçalves, Janine Mesquita; Souza, Eli Regina Barboza de; Fernandes, Eliana Paula; Leandro, Wilson Mozena; Tavares, Cássio Jardim

doi:10.15361/1984-5529.2014v42n2p157-163

Cited by 4 publications

(5 citation statements)

References 8 publications

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“…The application of glyphosate did not change foliar concentrations (Figure 4). Despite the findings described by Serra et al (2011) and Zobiole et al (2012) concerning the negative effects of the glyphosate use on nutrient uptake, other studies indicate that mineral nutrition in GM plants is not affected by the glyphosate application (Duke et al 2012;Gonçalves et al 2014;Rosolem et al 2010) Despite the harmful effects observed with or without the glyphosate application, except for Zn at the rate of 0 kg ha −1 (control) on soybean grown in a Typic Quartzipsamment that showed visual symptoms of nutrient deficiency ( Figure 5). N, P, K, Ca, Mg, S, B, Cu, Fe, and Mn concentration were within the 45.0 to 50.0 g kg −1 of N, 2.5 to 5.0 g kg −1 of P, 17.0 to 25.0 g kg −1 of K, 3.5 to 20.0 g kg −1 of Ca, 2.5 to 10.0 g kg −1 of Mg, 2.0 to 4.0 g kg −1 of S, 20 to 55 mg kg −1 of B, 6 to 14 mg kg −1 of Cu, 50 to 350 mg kg −1 of Fe, 20 to 100 mg kg −1 of Mn and 20 to 50 mg kg −1 of Zn concentration considered suitable by TPS (2013) for soybean cultivation.…”

Section: Foliar Nutrient Concentrationmentioning

confidence: 85%

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Effect of Glyphosate and Zinc Application on Yield, Soil Fertility, Yield Components, and Nutritional Status of Soybean

Moreira¹,

Moraes²,

Furlan

et al. 2016

Communications in Soil Science and Plant Analysis

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Glyphosate is a widely used nonselective herbicide for the control of agricultural weeds. It is being increasingly used in glyphosate resistant genetically modified plants. However, there are few studies on its effects on the nutritional status of soybean, particularly on the uptake of zinc (Zn). Two experiments were conducted under field conditions in a Typic Quartzipsamment and an Orthic Ferralsol to investigate the effect of glyphosate application × Zn interaction on soil fertility, yield components, seed yield (SY), shoot dry weight (SDW) yield, and nutritional status of soybean. The five Zn rates 0, 3, 6, 9, and 12 kg ha −1 were used in two soybean varieties and its essentially derived transgenic line BRS 245RR (GM), which was divided into: with (+Gly) and without (-Gly) glyphosate application. Only the P (phosphorus) and Zn available concentrations in the soil were impacted by Zn rates. However, the available P concentration only decreased in the soil planted with GM soybean. Mehlich 1 and diethylenetriaminepenta acetic acid-triethanolamine (DTPA-TEA), 7.3 extractants were effective to determine the available Zn. In the two crop sites, the number of pods per plant (NPP) and the SDW yield were affected by the interaction varieties × Zn. SY was influenced by the application of the herbicide, reducing a potential phytotoxic effect with the use of high rates. Regarding the nutrients, only the foliar calcium (Ca), boron (B), iron (Fe), and manganese (Mn) concentrations were negatively affected by glyphosate, and in the case of Zn, the difference occurred only between the varieties BRS 133 and BRS 245RR. ARTICLE HISTORY

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Section: Foliar Nutrient Concentrationmentioning

confidence: 85%

“…The highest yield reported for BRS 245RR +Gly (Figure 3) can be probably due to the more efficient weed control. Rosolem et al (2010) and Gonçalves et al (2014) also found that the presence of the gene that confers resistance to glyphosate herbicide (RR) in the plant did not affect soybean development and yield.…”

Section: Seed Yieldmentioning

confidence: 99%

Effect of Glyphosate and Zinc Application on Yield, Soil Fertility, Yield Components, and Nutritional Status of Soybean

Moreira¹,

Moraes²,

Furlan

et al. 2016

Communications in Soil Science and Plant Analysis

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“…Resistant plants are not affected by glyphosate, as they are insensitive to the action of this enzyme (Serra et al, 2011). However, there are questions about the effects on symbiotic bacteria, which do not have this same enzyme (Gonçalves et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Development of RR soybean in function of glyphosate doses and Bradyrhizobium inoculation

Bossolani

Poloni

Lazarini

et al. 2018

Rev. bras. eng. agríc. ambient.

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A B S T R A C TSoybean has traditionally been produced in systems that include the use of herbicides, often in higher than recommended doses. The process of symbiotic nitrogen fixation in legumes can be hampered by these herbicides, both by direct effects on rhizobia and indirect effects on the host plant. An outdoor experiment was performed to evaluate the effects of different doses of a glyphosate herbicide on Bradyrhizobium strains and biological nitrogen fixation in soybean BMX Potência RR plants. Soybean seeds were inoculated with Bradyrhizobium elkanii (SEMIA 5019) and Bradyrhizobium japonicum (SEMIA 5079) strains in a commercial liquid inoculant. The treatments consisted of the absence and presence of Bradyrhizobium genotypes inoculated via seed and four doses of the herbicide glyphosate applied on the leaves (0, 1.0, 2.0, and 4.0 L ha -1 of the commercial product) at the V 3 stage. The leaf chlorophyll index of inoculated RR soybean plants did not change on the application of glyphosate and, regardless of inoculation, plants had the capacity to recover from the effects of glyphosate application, without impaired development.Desenvolvimento da soja RR em função de doses de glifosato e da inoculação com Bradyrhizobium R E S U M OA soja tem sido produzida, tradicionalmente, em sistemas que incluem a utilização de herbicidas, muitas vezes em doses acima das recomendadas. O processo de fixação simbiótica de nitrogênio em leguminosas pode ser prejudicado por esses herbicidas, tanto por efeitos diretos sobre o rizóbio, como indiretos, sobre a planta hospedeira. Com o objetivo de avaliar o efeito de doses do herbicida glifosato sobre estirpes de Bradyrhizobium e a fixação biológica de nitrogênio em plantas de soja BMX Potência RR, foi realizado um experimento em vasos, conduzido a céu aberto. As sementes de soja foram inoculadas com as estirpes de Bradyrhizobium elkanii (SEMIA 5019) e Bradyrhizobium japonicum (SEMIA 5079). Foi utilizado um inoculante líquido comercial. Os tratamentos constituíram-se na ausência e presença das bactérias do gênero Bradyrhizobium inoculadas via semente e quatro doses do herbicida glifosato via foliar (0; 1,0; 2,0 e 4,0 L ha -1 do produto comercial) e aplicadas no estádio fenológico V 3 . A soja RR inoculada não altera o índice de clorofila foliar pela aplicação de glifosato e independentemente da inoculação, possui a capacidade de se recuperar da aplicação do glifosato, não prejudicando seu desenvolvimento.

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“…Entretanto, para obtenção de elevadas produtividades, observa-se a necessidade da utilização de novas tecnologias, como a transgenia, porém, sua utilização errônea pode provocar impactos ainda pouco divulgados (GONÇALVES et al, 2014).…”

Section: Introductionunclassified

Effect of Glyphosate and Manganese in Culture of Soy [Glycine Max L. Merrill]: Physiology Plant Nutrition, Agronomic Features

Caetano¹,

Lazarini

Charles

et al. 2018

Nucleus

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O glifosato sal de isopropilamina de N -(fosfonometil) glicina é um dos herbicidas mais utilizados em sistemas de cultivo de produtos agrícolas geneticamente modificados, especialmente para a cultura da soja. Visando estudar os efeitos da aplicação de glifosato e manganês (Mn) em diferentes estádios de desenvolvimento sobre a nutrição das plantas de soja, características agronômicas, desenvolveu-se o experimento na Fazenda de Ensino e Pesquisa da UNESP-Ilha Solteira, localizada no município de Selvíria-MS. O experimento foi instalado em 07/11/2012, utilizando-se a variedade de soja BRS Valiosa RR. O delineamento experimental utilizado foi blocos casualizados em arranjo factorial 3x3. O produto utilizado para fornecer Mn contém como matéria prima sulfato de Mn quelatizado com EDTA. A fonte do N -(fosfonometil) glicina foi o Roundup Original com concentração de sal de Isopropilamina de glifosato 480 g L -1 (360 g L -1 equivalente ácido). O tratamento: experimento com aplicação de glifosato nas doses de 0 ou 1440 g i.a. ha -1 (equivalente ácido), parceladamente nos estádios V3 e V7 ou em dose única no estádio V7, na ausência ou presença de 350 g ha -1 Mn, aplicado em dose única no estádio V5 ou parceladamente, com aplicações em V5 e V9. As pulverizações foliares dos tratamentos foram realizadas com pulverizador de barra de 5 m de comprimento, provida com bicos leque 110-02, espaçados de 50 cm, acoplado ao trator, e calibrado para volume de aplicação de 200 L ha -1 de calda. Diante dos resultados obtidos pode-se concluir que: Não houve alterações significativas no teor nutricional, apenas para o número de vagens por planta apresentou diferença significativa.

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Eficiência nutricional da soja RR na ausência do glifosato

Cited by 4 publications

References 8 publications

Effect of Glyphosate and Zinc Application on Yield, Soil Fertility, Yield Components, and Nutritional Status of Soybean

Effect of Glyphosate and Zinc Application on Yield, Soil Fertility, Yield Components, and Nutritional Status of Soybean

Development of RR soybean in function of glyphosate doses and Bradyrhizobium inoculation

Effect of Glyphosate and Manganese in Culture of Soy [Glycine Max L. Merrill]: Physiology Plant Nutrition, Agronomic Features

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