Ronaldo da Silva Viana

ORCID: 0000-0001-6819-5092
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About
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Research Areas
  • Growth and nutrition in plants
  • Sugarcane Cultivation and Processing
  • Soil Management and Crop Yield
  • Biofuel production and bioconversion
  • Thermochemical Biomass Conversion Processes
  • Agricultural and Food Sciences
  • Rice Cultivation and Yield Improvement
  • Crop Yield and Soil Fertility
  • Pesticide and Herbicide Environmental Studies
  • Plant responses to water stress
  • Weed Control and Herbicide Applications
  • Seed Germination and Physiology
  • Forest Biomass Utilization and Management
  • Legume Nitrogen Fixing Symbiosis
  • Natural Products and Biological Research
  • Algal biology and biofuel production
  • Bioenergy crop production and management
  • Biodiesel Production and Applications
  • Plant-Microbe Interactions and Immunity
  • Environmental and biological studies
  • Cassava research and cyanide
  • Carbon Dioxide Capture Technologies
  • Coffee research and impacts
  • Plant Stress Responses and Tolerance
  • Nematode management and characterization studies

Universidade Estadual Paulista (Unesp)
2016-2024

Universidade Paulista
2020

Faculdade de Tecnologia e Ciências
2013-2018

São Paulo State Technological College
2015-2016

Departamento de Ciência e Tecnologia
2016

Universidade Federal do Espírito Santo
2006

Tebuthiuron is often used to control weed growth in sugarcane cultures. This herbicide highly toxic and can persist soil for up 2 years according its degradation half-life. Hence, residual effect hazardous the environment local habitants via leaching, surface runoff. Screening out of species green manure as potential phytoremediators tebuthiuron soil, with no vinasse, accordingly scientific point this study. Green selected trial greenhouse were jack bean [ Canavalia ensiformis (L.) DC.],...

10.3389/fbioe.2020.613642 article EN cc-by Frontiers in Bioengineering and Biotechnology 2021-01-05

Phosphate fertilization in highly weathered soils has been a major challenge for sugarcane production. The objective of this work was to evaluate the foliar levels phosphorus (P) and nitrogen (N) technological quality productivity second ratoon cane as function inoculation with plant-growth-promoting bacteria (PGPBs) together residual effect phosphate fertilization. experiment carried out at research extension farm Ilha Solteira, state São Paulo, Brazil. designed randomized block three...

10.3390/plants12142699 article EN cc-by Plants 2023-07-20

We characterized the bacterial community in shoot and rhizosphere of healthy adult soybean plants grown two differentially managed soils. Then, these communities were transplanted to seeds assess their effect on seedling development. The inoculated seedlings assessed through 16S rRNA amplicon sequencing seedlings' growth was measured. diversity consortium inoculum prepared from higher than those shoot. However, application had no influence diversity. resulting with presented an enrichment...

10.1080/03650340.2021.1964017 article EN Archives of Agronomy and Soil Science 2021-08-11

Sugarcane is one of the most important grass crops. This study evaluated effects chemical ripeners on sugarcane variety SP81-3250 in terms technological quality. The experiment was arranged randomized blocks with split split-plots. Main treatments were: 1) Control; 2) Aminolon Maduracion, at a rate 0.7 L commercial product (c.p.) ha-1; 3) 1.0 liter c.p. 4) 1.3 5) Trinexapac-ethyl (Moddus), 0.8 ha-1. Secondary were sampling dates: 10 days before application (- d.a.a.); 11; 46; 71; 100 and 117...

10.4025/actasciagron.v30i1.1130 article EN cc-by Acta Scientiarum Agronomy 2008-03-18

This study aimed to evaluate the influence of low doses 2,4-D on agronomic traits upland rice applied at different stages crop growth. The work was carried out in a randomized completly blocks, and consisted application 5 herbicide (0, 0.68, 1.36, 2.04, 3.40 5.44 g acid equivalent (e.a.) ha−1) two development (tillering floral differentiation). Nitrogen contentes leaves, SPAD index yield are higher when is tillering stage. Application dose 2.04 a.e ha−1 results 19% increase number spikelet...

10.1080/03601234.2022.2099687 article EN Journal of Environmental Science and Health Part B 2022-07-23

This article presents a review on the use of graphene in various segments, elucidating that this product can be used industrial sectors. These include mainly agriculture (as large crops high relevance, such as coffee), food industry and environment, plant growth stimulator fertilizers, nanoencapsulation smart-release systems, antifungal antibacterial agents, smart packaging, water treatment ultrafiltration, contaminant removal, pesticide insecticide quantitation, detection systems precision...

10.33448/rsd-v10i2.12827 article EN Research Society and Development 2021-02-28

Com o objetivo de avaliar parâmetros produção e possíveis alterações morfoanatômicas tecidos foliares da cana-de-açúcar, variedade RB 86 7515, na fase estabelecimento, em condições matocompetição, foi conduzido um experimento vasos Dracena, Estado São Paulo, entre os meses abril junho 2010, Universidade Estadual Paulista Júlio Mesquita Filho. Foram utilizadas as espécies Brachiaria brizantha decumbens, consideradas como invasoras. Foi utilizado delineamento inteiramente casualizado, sendo...

10.1590/s0100-83582013000400003 article PT cc-by-nc Planta Daninha 2013-12-01

This study evaluates the emergence and initial development of sugarcane cultivars with different bud sizes, based on system pre-sprouted seedlings (PSS).Early (RB966928, RB855156 IACSP91-1099) were evaluated.These evaluations comprised three positions stem (tip, middle base) four types propagules (mini-stem 3 sizes diameters: 22 mm (1), 29 (2) 35 (3)).Three trials performed, each a cultivar.The experimental design for cultivar was randomized block in 3x4 factorial scheme (stem position x...

10.15361/1984-5529.2018v46n4p403-411 article EN Científica 2018-11-28

Objetivou-se com este trabalho avaliar o efeito de diferentes substratos na germinação e no desenvolvimento inicial jiló (S. gilo Raddi), cultivar Verde-Claro. Foi utilizado delineamento estatístico inteiramente casualizado quinze tratamentos, quatro repetições, considerando-se como unidade experimental 100 sementes. Os tratamentos consistiram utilização dos substratos: resíduos mineração calcário NPK adicional (S1), lodo (1:1 v/v) (S2), esterco bovino (S3), composto orgânico (S4), argissolo...

10.1590/s1413-70542006000300005 article PT cc-by Ciência e Agrotecnologia 2006-06-01

The biggest challenge facing in sugar-energy plants is to move towards the biorefinery concept, without threatening environment and health. Energy cane state-of-the-art of smart energy crops provide suitable whole-raw material produce upgraded biofuels, dehydrated alcohol for transportation, refined sugar, yeast-fermented alcoholic beverages, soft drinks, silage high-quality fodder, as well cogenerate heat bioelectricity from burnt lignocellulose. We, accordingly, present fuzzy c-means (FCM)...

10.5539/jas.v11n14p246 article EN Journal of Agricultural Science 2019-08-07

O objetivo do estudo foi avaliar os efeitos residuais de maturadores nas características morfoanatômicas folhas da cana-de-açúcar. delineamento experimental utilizado em blocos casualizados no esquema parcelas subdivididas. As foram constituídas pelas variedades cana-de-açúcar (SP80-3280 e SP80-1842) as subparcelas dos diferentes maturadores: Curavial 20 g p.c. ha-1 (sulfometuron-methyl); 20g + Roundup 0,15 L (sulfometuron-methyl glyphosate); Ethrel 0,67 (etephon); (etephon Moddus 0,80...

10.7824/rbh.v14i4.438 article PT Revista Brasileira de Herbicidas 2015-12-10

Development of strategies to ensure grazing systems are sustainably produced in harsh environments, while not fertilizing them conventionally, is challenging. Figuring out the extent which dose inoculation and period watering can positively influence establishment an effective symbiosis between U. brizantha cv. Marandu Azospirillum brasilense point this research. The treatment consisted mixing 1 kg seeds with inoculant strains Ab-V5 Ab-V6 at 5, 10, 20, 40 mL kg−1, 2 × 108 CFU mL−1. plants...

10.3390/agriculture10060220 article EN cc-by Agriculture 2020-06-10

Pellets refer to solid biofuels for heating and power. The pellet’s integrity is of great relevant ensure safe effective transportation storage, comfort stakeholders. Several materials that are supportive, whether organic inorganic, pellets exist. However, no work in the literature linking making hybrid non-wood with addition residual biomass from distillation cellulosic bioethanol, this requires further investigations. Figuring out how challenging agro-industrial residue could be...

10.3390/molecules25184219 article EN cc-by Molecules 2020-09-15
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