Navegando por Autor "Nunes, Ramom Rachide"

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Avaliação da germinação e crescimento inicial de plântulas de Lactuca sativa L. expostas à polivinilpirrolidona
(2022-05-27) Sales, Érica Danúbia Souza; Nunes, Ramom Rachide; http://lattes.cnpq.br/6182302726895126; http://lattes.cnpq.br/3843458808851603
Seed germination is a crucial moment for plant development and growth, once the species has suffered any kind of injury, excess or scarcity, the consequences can be permanent. Thus, the present work aims to evaluate the germination of Lactuca sativa L. (lettuce) in different concentration of polyvinylpyrrolidone polymer (PVP). Seed sowing (30/plate) was conducted in sterilized Petri dishes containing filter paper. In each plate, 3mL of the aqueous PVP solution was added at concentrations 0.001 mmol/L, 0.01 mmol/L, 0.1 mmol/L, 1 mmol/L and a control group with distilled water. Each treatment had 3 replicates. Seed germination was evaluated daily, at the end of the 7th day, measurements of hypocotyl length, radicle, fresh and dry mass weight, germination percentage tests, vigor index, tolerance, germination speed, water content and photosynthesizing pigments were performed.. The data were expressed in mean ± standard error and submitted to one way ANOVA followed by the Tukey test (the means were considered different when p<0.05). The group treated with 1 mmol/L presented the radicle development affected, while all others did not present major impacts. %G, IVG, IT, hypocotyl and photosynthetic pigments did not present significant results when compared to the control group. Our data indicates a warning sign for the polyvinylpyrrolidone disposal, and highlights the need of further research regarding its toxicity.
Carbonização hidrotérmica (HTC) aplicada à valorização da matéria orgânica dos resíduos da indústria sucroalcooleira: uma breve revisão
(2024-03-01) França, Jonas Gabriel de Souza; Nunes, Ramom Rachide; http://lattes.cnpq.br/6182302726895126; http://lattes.cnpq.br/3516070469169027
Hydrochar (HC) is the main product of an environmental technology hydrothermal carbonization (HTC). HTC is widely used to mitigate the impacts generated by agricultural industries as they play an essential role in addressing the challenges faced by the environment due to human activities. In Pernambuco State these environmental technologies have been gaining prominence, mainly in mitigating problems related to sugarcane production. Hydrothermal Carbonization has proven to be an effective environmental technology to promote optimal management of agricultural waste. HTC is an environmental technology that aims to transform the organic matter (OM) in biomass into a material with greater added value, named as hydrochar. Generally, HTC is performed in a reactor, where the biomass and an aqueous solution are placed and subjected to mild temperatures (180-250°) and self-generated pressures. It has been approached as a promising technology for treating agricultural waste, especially those from the sugar and alcohol industry. Since the waste generated by this industry (e.g., bagasse, vinasse and filter cake) has a high OM content, HTC is more effective. Thus, this work aimed to carry out a literature review to analyze the use of these agricultural residues from the sugar and alcohol industry, as feedstock in the production of hydrochars via HTC.
Estudo da água de tanques de piscicultura para uso em um sistema integrado de agricultura: um estudo químico e hormono-similar em prol do desenvolvimento agrário no interior da região nordeste
(2019-12-11) Maia, Hermógenes Bezerra; Nunes, Ramom Rachide; http://lattes.cnpq.br/6182302726895126; http://lattes.cnpq.br/1881302618582553
The low natural fertility of Brazilian soils is due, in the most part, to their high acidity and nutrient levels below those needed for cropproduction. This problem is more accentuated in the interior of the Brazilian Northeast, due to its edaphoclimatic conditions, characterized by their dry climate and irregular rainfall pattern. In another context, fish farming is becoming moreprominent and growing in the region, as aquaculture demands less water than conventional livestock, with an average of 800 L of water per kg of fish produced. Even in its importance, fish farming is considered an activity that generatespotentially toxic effluents, because it has a high content of organic matter (OM) and nutrients. Taking both issues as a challenge — the problem of poor soil fertility and effluent generation by aquaculture — the implementation of an integrated agriculture-fish farming system would be an interesting alternative as it would aim at reusing water from fish farms through enhancement of OM and nutrient recycling through irrigation, promoting benefits for crop production and agrarian development. Part of these benefits is imputed to the hormone-like activity, attributed to the presence of organic molecules that make up the OM fractions. In this sense, the present work aimed to conduct a chemical study of water from fish ponds for use in irrigation of plants of economic interest, besides evaluating the hormone-like activity of OM present in the analyzed samples. Fish farming water samples (FFW) were collected from the Cooperativa dos Produtores do Vale do Itaparica (COOPVALE), in the municipality of Itacuruba (PE) and their characteristics (pH, EC, turbidity, nutrients and TOC) were determined. To evaluate hormone-like activity, bioassays were performed with cucumber (Cucumis sativus) seeds, with different carbon concentrations, present in the FFW. According to the results obtained in the characterization of pisciculture water, it is considered that its chemical characteristics allow the use in irrigation ofplants of economic interest. In the bioassays it waspossible to observe the biostimulant action of FFW at concentrations from 5.0 mg C L-1. Furthermore, it is considered that the higher the carbon concentration in the FFW sample, the greater the biological response, as observed in the increase of C. sativus root growth index. Thus, it is concluded that it is possible to recycle and reuse the OM and nutrients of fish water in cropproduction,in favor of agrarian development within the NE Region, in an integrated system, agriculture-fish farming, in an organic farming system. agroecological, mimicking a cultivation in a family nucleus system, in the interior of the Northeast, in the Pernambuco hinterland.
Explorando o potencial de pilosocereus gounellei na remoção da matéria orgânica presente em águas naturais destinadas ao consumo animal
(2020-11-03) Cândido, Guilherme Henrique da Silva; Nunes, Ramom Rachide; http://lattes.cnpq.br/6182302726895126; http://lattes.cnpq.br/0555151159609370
Animal welfare is a recurrent concern, relating not only the herd health, but also the animal production and the consequent profits generating in the field. Animal drinking water quality, frequently reported as of poor potability, is a challenge to be overcome, mostly due to the excess of organic matter (OM) in solution. An alternative to remove the OM is the use of an alternative material. In this study, use of cactus Pilosocereus gounellei was explored, carrying out a kinetic and adsorptive study aiming to estimate the effectiveness of the proposed technology. Samples of goat drinking water were treated using P. gounellei, in natura and acid treated (using [HCL] in the range 0.01-4.0 mol L−1). A study of the sorption process was performed, and isotherms and kinetics models were evaluated. Thus, after mathematical treatment, isotherm of Freundlich (isotherm type C, constant partition) and pseudo-second order kinetics were considered the most suited, indicating the multilayer formation and the removal rate proportional to the square of the adsorbate concentration. In addition, samples treated at higher acid concentration reached equilibrium after removing a greater concentration of OM when compared to in natura (up to 1.6x the own weight). Based on our findings, our study indicates the possibility of removing the OM present in samples of natural water, using the P. gounellei cactus (acid treated) as an alternative adsorbent material, intending to the good practices in livestock and animal welfare.
O papel dos compostos auxino-similares extraídos de hidrocarvões de resíduos de milho na germinação de sementes-teste de Lactuca sativa
(2022-12-14) Lima, Edson Thiago Gomes de; Nunes, Ramom Rachide; http://lattes.cnpq.br/6182302726895126; http://lattes.cnpq.br/1474841030315836
Neste trabalho estudou-se a atividade auxino-similar de hidrocarvões líquidos e sólidos obtido a partir de resíduos de milho, preparados por carbonização hidrotérmica (HTC). Os bioensaios foram realizados testando concentrações do hidrocarvão líquido na faixa de 0,0557-5570,0 mg de carbono L-1 ; e hidrocarvão sólido na faixa de 0,026-2600,0 mg de carbono L-1 . A matéria orgânica dissolvida (DOM) foi extraída para realização de testes utilizando hidrocarvão sólido. Os bioensaios foram realizados com sementes de Lactuca sativa. Os métodos instrumentais MEV, ATR-FTIR e Py-GC/MS foram usados para avaliar o efeito da HTC na produção/composição de hidrocarvão. O hidrocarvão líquido apresentou intensa bioatividade, inibindo completamente a germinação das sementes-teste em concentrações acima de 696 mg C L-1 . O hidrocarvão líquido foi consideravelmente mais bioativo que a DOM, mesmo apresentando efeito auxino-similar nos testes de germinação. A análise MEV mostrou como a HTC transformou a superfície da matériaprima, abrindo poros e sulcos nos hidrocarvões. O ATR-FTIR também mostrou que a HTC mudou a composição química dos resíduos de milho, reduzindo os grupos hidroxila e enriquecendo o material com grupos funcionais aromáticos. O Py-GC/MS permitiu a identificação das moléculas envolvidas nos efeitos do tipo AIA: ácidos carboxílicos (lineares e aromáticos) e aminoácidos. A concentração de mais moléculas bioativas, ao invés de sua simples presença na fração do hidrocarvão, determinou o efeito bioestimulante, além de uma boa regressão linear entre a atividade auxino-similar e a concentração de moléculas ativas estimulantes.
Vermicompostagem como tecnologia aplicada à valorização da matéria orgânica de resíduos do milho, nas condições edafoclimáticas do sertão pernambucano
(2019-12-11) Siqueira, Andreza Jayane Nunes de; Nunes, Ramom Rachide; http://lattes.cnpq.br/6182302726895126; http://lattes.cnpq.br/5272674335190028
This research presents the vermicomposting as an environmental technology applied in the recycling and treatment of waste obtained in the maize production, taking into consideration the edaphoclimatic conditions of the Pernambuco Backwoods, under the perspective of the Environmental Chemistry. In addition, a physical and chemical study of vermicomposting were carried out. Vermicomposting is a process of biological transformation, as well as bio-oxidation and stabilization of organic matter (OM), turning it into a fertilizer of high agricultural potential. In this study, the vermicomposts were produced adding residues of corn, straw and cob, also adding goat manure and sawdust as organic substrate. In each vermicompostor 250 Eisenia fetida earthworms. were added. During the 120 days of the experiment, the following chemical attributes were analyzed: total solids (TS), pH, total organic carbon (TOC), organic matter (OM) and cation exchange capacity (CEC). The pH, TOC and OM results showed a decrease in their values during the vermicomposting process; while the CTC content increased. Both trends indicated that vermicomposts reached stability and maturity desired. In addition, worms showed good adaptation to vermicompostors. Thus, it was concluded that vermicomposting can be used as an effective technology for corn waste treatment and production of agricultural inputs. In the future, it is expected to apply the composed of new corn crops, renewing the cycle of the production chain, under conditions of cycling its organic matter and nutrients in favor of the agrarian and social development of the interior of the Brazilian Northeast.
Vermicompostagem como tecnologia aplicada no tratamento de resíduos da agroindústria de polpas de frutas tropicas: uma breve revisão
(2024-03-01) Silva, Almir Mendes da; Nunes, Ramom Rachide; http://lattes.cnpq.br/6182302726895126; http://lattes.cnpq.br/0859445695330939
Vermicomposting is an environmental technology applied to the treatment of organic waste, converting it into an agricultural input with high agronomic potential, produced from the combined action of earthworms and the microorganisms that live in their digestive tracts. In this process, earthworms feed on organic waste and excrete a material called vermicompost, rich in nutrients and microorganisms beneficial to the soil-plant system. The chemical attributes of vermicompost improve soil structure, increase its water retention capacity and promote microbial activity. This environmental technology has several advantages, as it is an efficient and sustainable way of recycling organic matter and nutrients, as well as mitigating the environmental impacts caused by waste that ends up in landfills or is abandoned in the field. Among the waste that is a cause for environmental concern, specifically tropical fruits: yellow mombin, Guarani cherry, and Brazilian cherry (main Brazilian native tropical fruits). Furthermore, by-products from fruit processing are not reused due to their lack of commercial value and can cause several environmental problems when disposed of inappropriately. Thus, this work aimed to carry out a bibliographical review on the originality of the project, as well as the possibility of vermicomposting the by-products of fruit pulp processing, comparing this study with others found in the literature. As a result, no studies were found in which yellow mombin, Guarani cherry, and Brazilian cherry waste are vermicomposted, giving originality to the proposal. Furthermore, studies with similar fruits, reported in the literature, indicate the possibility of vermicomposting the aforementioned residues, producing an input with high agronomic potential, suitable for use in organic and ecologically based agricultural systems.
Vermicompostagem de resíduos de milho nas condições culturais e edafoclimáticas do sertão brasileiro
(2022-12-14) Silva, Jefferson Campos da; Nunes, Ramom Rachide; http://lattes.cnpq.br/6182302726895126; http://lattes.cnpq.br/6584309908538134
A vermicompostagem tem sido reportada como uma importante tecnologia para reciclar matéria orgânica e nutrientes de resíduos agrícolas. No entanto, as condições edafoclimáticas são obstáculos no semiárido, pois as altas temperaturas e a baixa umidade podem interferir negativamente na adaptação das minhocas e na produção de vermicomposto. Assim, neste estudo, a vermicompostagem foi aplicada no tratamento de resíduos de milho (sabugo e palha), sob condições culturais (utilizando resíduos locais e condições de campo replicáveis) e edafoclimáticas do sertão brasileiro. Durante 120 dias foi realizado um monitoramento químico. Os resultados mostraram um aumento na estabilidade da matéria orgânica (MO), além de um aumento considerável no potencial agrícola do vermicomposto: a CTC aumentou de ~37 para 649 cmolc kg-1 ; MO e TOC reduziram de ~83 para 49% e ~43 para 27%, respectivamente. Por fim, os vermicompostos produzidos são considerados adequados para melhorar a qualidade do solo e promover uma agricultura moderna, aumentando a produtividade e a geração de renda no campo.