Mestrado em Agroquímica

URI Permanente para esta coleção

http://repositorio.ufes.br/handle/10/17377

Nível: Mestrado Acadêmico
Ano de início: 2016
Conceito atual na CAPES: 4
Ato normativo: Homologação da 161ª Reunião do CTC-ES, Parecer CNE/CES 617/2016.1502
Periodicidade de seleção: Anual
Área(s) de concentração:Agroquímica
Url do curso: https://agroquimica.alegre.ufes.br/pt-br/pos-graduacao/PPGAQ/detalhes-do-curso?id=1056

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Agora exibindo 1 - 11 de 11

Adsorção de cromo hexavalente por hidróxido de alumínio amorfo em meio aquoso: isotermas e termodinâmica
(Universidade Federal do Espírito Santo, 2022-02-15) Oliveira, Sara de Jesus; Burak, Diego Lang; https://orcid.org/0000000267583517; http://lattes.cnpq.br/2501042964619476; https://orcid.org/0000000271299690; http://lattes.cnpq.br/4230219901556586; Anastácio, Simone Aparecida Fernandes; https://orcid.org/0000-0002-7030-6748; http://lattes.cnpq.br/0532528200582514; Neves, Mirna Aparecida; http://lattes.cnpq.br/4696981882395783
The presence of potentially toxic metals in the environment lethally affects the ecosystem, which means that environmental responsibility actions have being developed in order to minimize the damage caused by those elements. Therefore, this study has been evaluated the removal of hexavalent chromium by amorphous aluminium hydroxide in aqueous media under experimental temperature conditions of 25, 45 and 55 °C, and concentrations of adsorbate ranging from 30 to 300 mg L -1 . The adsorbate has been synthesized by the precipitation method, and characterized by the diffuse reflectance in near infrared (NIR) method, obtaining three significant peaks that described the product. By using partition coefficient (Kp), it was possible to establish the saturation point on the adsorbate active sites. The equilibrium isotherms, based on the determination coefficient (R2 ) indicated the adjustment order: Sips> RedlichPeterson> Koble-Corregan> amorphous aluminium hydroxide Langmuir> Jovanivich> Freundlich. The negative values of (∆G°) and enthalpy (∆H°) indicated that the reaction is spontaneous and the process is exothermic, respectively. The maximum adsorption capacity (qmax) of the amorphous aluminium hydroxide was 77,52 mg g-1 , which proves the removal efficiency in the hexavalent chromium in aqueous media.
Avaliação da espectrometria no infravermelho próximo na determinação de C e N de solos da região Sul do Espírito Santo
(Universidade Federal do Espírito Santo, 2019-05-15) Vieira, Camila Fernandes; Mendonça, Eduardo de Sá; Burak, Diego Lang; Anastácio, Alexandre dos Santos
The present study aimed to investigate the predictive capacity of total organic carbon and nitrogen contents by means of near infrared reflectance spectroscopy (NIR) and its potential for use in routine soil analysis. This method presents greater agility
Caracterização e classificação da Lama de Beneficiamento de Rochas Ornamentais (LBRO) de acordo com as etapas produtivas
(Universidade Federal do Espírito Santo, 2020-08-10) Nascimento, Wenderson Abreu Rosa; Neves, Mirna Aparecida; https://orcid.org/0000-0002-3611-6414; http://lattes.cnpq.br/4696981882395783; https://orcid.org/0000-0001-6699-2469; http://lattes.cnpq.br/4108809814810145; Burak, Diego Lang; https://orcid.org/0000-0002-6758-3517; http://lattes.cnpq.br/2501042964619476; Oliveira, Michel Picanço ; https://orcid.org/0000-0001-9241-0194; http://lattes.cnpq.br/6383844066460475
The State of Espírito Santo has a large number of companies that operate in the extraction and processing of dimension stones, and is currently the largest national producer, with an emphasis on the large share of revenues from Brazilian stone slab exports. These activities generate a significant volume of waste, among which, what draws the most attention is the dimension stone processing slurry (DSPS), from the phases of block sawing and plate polishing. Thus, the variation in the physical and chemical parameters of the DSPS depends on the technology used in the processing, the quality or type of component added to the process, in addition to the quantity, which varies considerably from one company to another. Compositional variations also occur depending on the type of processed rock, the stages of water reuse, among other factors. Having the classification and characterization of the LBRO is to provide necessary subsidies for the proper management of the sludge when it is discarded, both for companies and for environmental agencies. In this study, the objective is to characterize and classify the DSPS according to the processing steps (unfolding and polishing) from collections made in companies that have conventional and diamond wire looms, and polishing machines. Therefore, the information presented allowed to classify the DSPS samples and demonstrate that the metals tend to concentrate in the liquid phase of the sludge, and, in the solid phase, the concentrations are attenuated. This demonstrate the relevance of establishing a more detailed monitoring of the raw materials and inputs, which are the components for understanding the formation and composition of the DSPS and thus properly manage the processing of rocks and minimize the appearance of contaminants in the wastes generated
Caracterização físico-química de biochars provenientes de lodo de esgoto : influência de diferentes temperaturas de pirólise e atmosferas
(Universidade Federal do Espírito Santo, 2024-03-21) Pires, Keyla Bendia; Burak, Diego Lang ; https://orcid.org/0000-0002-6758-3517; http://lattes.cnpq.br/2501042964619476; Morais, Pedro Alves Bezerra ; https://orcid.org/0000-0001-5501-7350; http://lattes.cnpq.br/5220285635137407; https://orcid.org/0000-0002-5024-1510; http://lattes.cnpq.br/5123260038681397; Ferreira, Rafael de Queiroz ; https://orcid.org/; http://lattes.cnpq.br/5053247764430323; Passos, Renato Ribeiro ; https://orcid.org/0000-0001-7730-748X; http://lattes.cnpq.br/3882320619443256
This research study, driven by population growth and the ensuing environmental challenges, is dedicated to exploring sustainable solutions for the treatment of sewage sludge (SS). The principal objective was to generate biochar derived from SS at three distinct locations within the southern region of Espírito Santo, Brazil. The pyrolysis process was conducted at temperatures of 350, 550, and 750°C in the presence or absence of argon flow. Atomic absorption spectroscopy (AAS) was utilized to assess the biochar's elemental composition, employing three distinct acid extraction methodologies for the nutritional analysis. The results obtained by AAS indicated significant data for the pseudo-total availability of potassium in Cachoeiro, at 550 °C under an argon atmosphere, reaching 15 g/kg, and calcium in Itaoca at 750 °C under an oxygen atmosphere, reaching 30 g/kg. In Pacotuba, the percentage availability of calcium reached 47% at 750 °C in an oxygen atmosphere. The percentage availability of manganese in Pacotuba also exhibited a significant result, reaching 25% at three treatment temperatures in an argon atmosphere. The second phase entailed a qualitative analysis employing scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction, and Fourier transform infrared spectroscopy (FT-IR). X-ray diffraction analysis revealed the formation of turbostratic carbon structures and the formation of crystalline structures of inorganic compounds. Scanning electron microscopy (SEM) images demonstrated that the particle's interior consisted of a dark core indicative of carbon, while lighter inorganic oxides adhered to the surface. Fourier transform infrared (FT-IR) analysis revealed the presence of structures such as hydroxyl groups and C-H stretches at wavelengths between 4000 and 3500 cm-1 . The present study significantly advances our understanding of environmental stewardship in a context of sustainable agricultural practices. Biochar has been proven to be an efficacious conditioning agent for potassium and calcium, as evidenced by this study
Coleoptera: Scarabaeidae: Scarabaeinae e suas funções na qualidade de solos sob pastagens
(Universidade Federal do Espírito Santo, 2020-03-19) Giestas, Pedro Henrique Charpinel; Mendonca, Eduardo de Sá; https://orcid.org/0000-0003-3284-7129; http://lattes.cnpq.br/4735276653354808; https://orcid.org/0000-0001-9199-065X; http://lattes.cnpq.br/8099384165242070; Burak, Diego Lang; https://orcid.org/0000-0002-6758-3517; http://lattes.cnpq.br/2501042964619476; Santos Junior, Hugo José Gonçalves dos ; https://orcid.org/0000-0002-6780-6610; http://lattes.cnpq.br/8499663924650322
The dominance of degraded pastures in Brazil and the State of Espírito Santo negatively impacts the diversity of organisms and carbon stocks in the soil. Our work aimed at understanding how different levels of degraded pastures and forest fragments affect the diversity and ecological functions performed by dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae) and what is the relationship of these services on soil quality and attributes related to the organic matter in the Caparaó Capixaba region, south of Espírito Santo and in the laboratory. For the field experiment, 21 sample areas were selected, with seven forest fragments (FFL) and 14 pastures (seven with high level of degradation (PAD) and seven with low level of degradation (PBD)) in the municipalities of Alegre and Guaçuí – ES. In these areas, soil samples were collected at depths of 0 to 10 and 10 to 20 cm, CO2 emission samples, resistance to soil penetration, soil temperature and humidity, and ecosystem functions, richness, abundance and composition of dung beetles were also quantified. In the laboratory experiment, 20 experimental PVC structures were filled with soil and bovine feces and divided in two treatments, one containing an individual of Dichotomius bos (n=10) and another treatment without a beetle (n=10). Among the studied environments, PBD showed higher rates of dung burial (246.96 g ± 24.65) and soil excavation (339.08 g ± 58.81). DBP showed lower means for both functions. Pastures reduced the mean richness (1.90 ± 0.29) and abundance (16.52 ± 7.28) of scarabaeinae compared to FFL, being lower in PADs. We did not find any correlation between the richness and abundance of the beetles with the attributes of soil organic matter studied in the field experiment. In the field, PBD had a higher CO2 emission (2.94 cmol-1 ± 0.29) among the areas. In the laboratory experiment, the treatment with the presence of the beetle increased the content of the soil organic matter attributes. The treatment without a beetle showed a higher CO2 emission (9.44 cmol-1 ± 0.91) in the first hours after the feces entered the system. We conclude that PAD favor the increase in the surface runoff of water due to the low vegetation cover and higher values for resistance to penetration, resulting in erosive processes, inefficiency in carbon mobilization and modify the functioning of the ecosystem, negatively influencing the diversity and ecological functions of dung beetles
Efeito do óleo essencial de eucalipto e de substâncias húmicas no crescimento de Brachiaria e Estilosantes em diferentes condições hídricas
(Universidade Federal do Espírito Santo, 2019-02-27) Praca, Nayara Maria Pedrosa; Mendonca, Eduardo de Sá; https://orcid.org/0000000332847129; http://lattes.cnpq.br/4735276653354808; https://orcid.org/0000-0001-7931-5707; http://lattes.cnpq.br/0282684641562916; Pecanha, Anderson Lopes; https://orcid.org/0000-0001-8029-0092; http://lattes.cnpq.br/6011630397289924; Burak, Diego Lang; https://orcid.org/0000000267583517; http://lattes.cnpq.br/2501042964619476; Profeti, Luciene Paula Roberto; https://orcid.org/0000-0001-6280-2410; http://lattes.cnpq.br/6517975282316378
Generally degradation of pastures is associated with factors related to the establishment of forage and management, causing a decline in the natural fertility of the soil, which leads to the degradation of these areas exploited by livestock. Within the principles of soil conservation, the use of biostimulants of vegetative growth and the cycling of nutrients by green manuring, are proving increasingly favorable in the development of sustainable technologies. The objective of this work was to develop, evaluate and validate biotechnologies integrating the use of humic substances extracted from vermicompost and eucalyptus essential oil in the initial growth of the grass Brachiaria brizantha cv. Marandu and in the leguminosa Estilosantes cv. Campo Grande. In chapter 1, humic substances extracted from vermicompost (SH) and eucalyptus essential oil (OEE) were used as vegetable biostimulants. In Chapter 2 and 3 the effect of the application of humic substances and eucalyptus essential oil on the growth and development of Brachiaria brizantha cv. Marandu and Estilosantes cv. Campo Grande, respectively, in different levels of soil moisture (70%, 49% and 28% VTPOA). The parameters analyzed were aerial and root dry mass, plant height, gas exchange measurements and carbon (C) and nitrogen (N) analysis. In Chapter 1, the main functional groups present in the humic substances were found, the stretching of -OH, stretching of C = O of -COOH groups, C = C stretch of aromatic groups, C-N-H stretch of amides, C-O stretching of carboxylic acids and polysaccharides. UV-visible analysis showed that SHs exhibit high structural condensation, ie, a large number of aromatic structures compared to aliphatic structures, due to a high degree of humification. By means of mass spectrometry, the 1,8-Cineole compound, identified in the OEE, was considered the majority, representing 88.03% of the total compounds. In chapter 2 the use of humic substances provided greater accumulation of N in the plant biomass of the plants of Brachiaria brizantha cv. Marandu, increasing 53.48% of the accumulation of N in the aerial part of the plants when compared to the control treatment. In Chapter 3, the application of OEE and SH promoted a higher production of MSPA, with a difference of 57.8% and 35.2%, respectively, over MS when compared to control. They also provided favorable results for MSPR production and nodulation increase.
Espectroscopia de reflectância difusa no infravermelho próximo e aprendizado de máquina na determinação do teor de matéria orgânica de solos do Espírito Santo
(Universidade Federal do Espírito Santo, 2021-08-25) Souza, Thamiris Ferreira de; Burak, Diego Lang; https://orcid.org/0000000267583517; http://lattes.cnpq.br/2501042964619476; https://orcid.org/0000-0001-6775-6767; http://lattes.cnpq.br/1883619165644152; Mendonca, Eduardo de Sá; https://orcid.org/0000000332847129; http://lattes.cnpq.br/4735276653354808; Anastácio, Alexandre dos Santos; https://orcid.org/0000-0002-2620-754X; http://lattes.cnpq.br/5749524589135573; Fraga Filho, Clayton Vieira; https://orcid.org/0000-0002-0557-4666; http://lattes.cnpq.br/7004550879685129
The research on the use of NIR spectroscopy to predict soil attributes, whether chemical or physical, has been receiving attention in recent years, because, in addition to presenting high potential as a soil analysis methodology, the technique has advantages when compared to methods used by routine laboratories, such as speed and practicality by dispensing with laborious analytical steps and the use of chemical reagents. Therefore, it contributes directly to the environment, as it does not use reagents often with high toxicity. The present study aimed to evaluate models with information from diffuse reflectance spectroscopy in the near infrared, for the prediction of organic matter contents in soil samples from the state of Espírito Santo. The following steps were followed: preparation of soil samples (Air-dried fine soil sieved in 2 mm); obtaining the organic matter contents and NIR spectra from the database; selection of sample groups and stratification with the K-means algorithm; application of pre-treatments; finally, adjustments and data evaluation were made to the PLS, Cubist, SVM, RF, GBM and GPR regression models. Among the results for the prediction of organic matter contents, R²=0.83 and R²=0.75 were highlighted, using the SG pre-processing technique associated with the PLS model and the IRLS technique with the Cubist model, respectively. These results come from the test set separated by the K-means algorithm. They were considered satisfactory. The stratification of the data group into subgroups proved to be effective in improving the predictive capacity of the built models. Cubist, linear GPR and polynomial SVM models also showed good performance for the prediction of soil organic matter associated with NIR spectroscopy, assuming a starting point for future studies.
Remoção do corante verde malaquita por adsorção em biocarvão do endocarpo de coco (Cocos nucifera L.)
(Universidade Federal do Espírito Santo, 2023-02-22) Alves, Ruan de Oliveira; Profeti, Demetrius; https://orcid.org/0000000345653331; http://lattes.cnpq.br/5030262115789096; https://orcid.org/0000-0001-5583-4991; http://lattes.cnpq.br/4048238039903865; Gardiman Junior, Benvindo Sirtoli; https://orcid.org/0000-0001-5197-4970; http://lattes.cnpq.br/0029842339452861; Burak, Diego Lang; https://orcid.org/0000000267583517; http://lattes.cnpq.br/2501042964619476
The textile industry is among the largest sectors that require high amounts of water for their operation, and in general, their effluents have high concentrations of synthetic dyes, including malachite green. Various methods are used for treating this type of effluent, but adsorption stands out for its high capacity to remove specific compounds present in aqueous media. Thus, in this study, biocarbon from coconut endocarp (Cocos nucifera L.) was produced and characterized, and the adsorption kinetics of malachite green dye in aqueous solution was evaluated. The biocarbon synthesized at 600°C in N₂ atmosphere had an amorphous structure with a porous surface area of 34,978 m2 g -1 and a pHpzc of 7.82. The influence of pH on adsorption, performed in the pH range of 2 to 7, showed an increase in the removal capacity from 5.63 to 84.46% with increasing pH. The adsorption kinetics were evaluated by the models of PseudoFirst Order, Pseudo-Second Order, Elovich, Avrami, and intraparticle diffusion, where data fitting showed that the Avrami model describes the adsorption mechanism, while the diffusion model elucidated that the transport process is not governed by intraparticle diffusion with an apparent activation energy of 84.95 kJ mol-1 , characterizing adsorption as a chemisorption process. In the equilibrium study, the experimental data were best described by the Sips model. The adsorption isotherm at 25 °C showed a qmax of 37.42 mg g-1 with a removal of 75.36%, while at 55 °C, a qmax of 44.87 mg g-1 with a removal of 92.57% of malachite green was obtained. Furthermore, the variation in Gibbs free energy (ΔG) from -20.652 to -25.857 kJ mol−1 showed that the adsorption process was spontaneous, while the positive value of (ΔH) of 30.956 kJ mol−1 indicated an endothermic process. Similarly, an increase in the degree of disorder at the liquid-solid interfaces was observed from the variation in entropy (ΔS) of 172.512 J mol K-1 . Thus, according to the observations, the study revealed that the adsorption process was feasible, spontaneous, and endothermic, and the application of biocarbon is a promising option for removing malachite green.
RESÍDUOS DA LAVRA E DO BENEFICIAMENTO DE ROCHAS ORNAMENTAIS COMO POTENCIAL REMINERALIZADOR DO SOLO
(Universidade Federal do Espírito Santo, 2022-08-23) Santos, Elton Souza dos; Neves, Mirna Aparecida; https://orcid.org/; http://lattes.cnpq.br/4696981882395783; https://orcid.org/0000000327343858; http://lattes.cnpq.br/; Burak, Diego Lang; https://orcid.org/0000000267583517; http://lattes.cnpq.br/2501042964619476; Moreira, Thamyres Fernandes Messa; https://orcid.org/0000-0001-7326-8022; http://lattes.cnpq.br/8873474924875435
In agriculture, the use of residues from mining and processing of dimension stones as an alternative source of nutrients has been growing, due to the advantages in the economic, environmental, and productive sectors. This work aimed to evaluate the suitability of using mining residues and processing dimension stones as a potential remineralizer of soils. Seven samples of coarse waste generated in quarries were selected, called remaining stocks (identified by the acronyms ARD, CBE, CIE, MGE, OIE, PSBE and PSGE) and for three of them, waste generated by sawing on a multiwire loom, called multi-wire waste (identified by the abbreviations OIM, PSBM and PSGM). Waste pH and particle size, chemical composition via x-ray fluorescence, mineralogical composition from petrographic analysis and x-ray diffraction, quantification of free SiO2 via Rietveld method and pH, electrical conductivity and metal contents in the solubilized extract prescribed by Annex G of NBR 10004:2004. The results obtained were compared with the Normative Instruction nº 5 of 2016 (IN) of the Ministry of Agriculture, Livestock and Supply. Finally, the effect of the use of residues on the physical and chemical characteristics of the soil submitted to the incubation process in accordance with the IN was evaluated. Except for the ARD residue, all residues from the remaining stock, after comminution, are classified as powder, as they have a 100% granulometry that passes through a 2.00 mm sieve. Multi-wire waste, together with ARD, is classified as filler, as it is 100% passing through a 0.03 mm sieve. All have alkaline pH, K2O content greater than 1% and base sum greater than 9%, except for the OIM residue, whose value was 5.36%. All had free SiO2 content lower than the threshold value of IN, which is 30%, and had levels of micronutrients Si and Fe above the limits to be declared on the label, in case they were registered. None of the residues have concentrations of As, Cd, Hg and Pb that make them potentially toxic. All are classified as class II, according to NBR 10004:2004. However, ARD, PSBM and PSGM residues were classified as class II - inert, while the others were classified as class II - non-inert, due to the parameters Al, Ba and Fe, which were with values above the maximum limit allowed by the standard. The ARD, PSBM and PSGM residues showed a moderate degree of restriction regarding RAS, while the others showed a severe degree of restriction. However, all showed no restrictions on use for salinity. Thus, all waste analysed in this study meets the minimum and maximum requirements set out in IN No. 05 of MAPA (BRASIL, 2016) regarding physical and chemical nature. Furthermore, the results obtained during the incubation stage, inherent to the Agronomic Protocol, showed their potential for use as soil remineralizers.
Sacolinhas de tecido não tecido (TNT) e polímero hidroretentor na produção de mudas florestais.
(Universidade Federal do Espírito Santo, 2022-02-21) Fiorese, Caio Henrique Ungarato; Oliveira, Carlos Henrique Rodrigues de; https://orcid.org/0000-0003-4829-8005; http://lattes.cnpq.br/1293627013882628; https://orcid.org/; http://lattes.cnpq.br/; Goncalves, Elzimar de Oliveira; https://orcid.org/0000000176752493; http://lattes.cnpq.br/4127505406039950; Berilli, Savio da Silva; https://orcid.org/0000-0003-0554-8756; http://lattes.cnpq.br/1703547133505721; Burak, Diego Lang; https://orcid.org/0000000267583517; http://lattes.cnpq.br/2501042964619476
Studies based on the production of forest seedlings in the midst of alternatives, such as biodegradable bags and water-retaining polymers, are relevant in order to favor the retention of nutrients, favor the plant's attachment in the field, seedling quality and minimize the generation of waste. In this sense, the objective was to study the effect of non-woven fabric bags (TNT) and water-retaining polymer on growth, quality and nutrient assimilation of forest seedlings. The experiment took place in a greenhouse, using the following species: Joannesia princeps Vell. (cutieira) and Samanea tubulosa (Bentham) (seven bark). In the seedling phase, 6 treatments were evaluated: T1 - plastic bag; T2 - plastic bag with gel; T3 - TNT bag without holes; T4 - TNT bag without holes and with gel; T5 - TNT bag with holes; T6 - TNT bags with holes and gel. Periodically, the following were obtained: height, collar diameter and number of leaves. At 100 days after sowing, the following were determined: root, stem and leaf dry biomass, leaf area, Dickson and SPAD quality indices, leaf nutrients and the relationships between them. For the seven husks, at 95 days after sowing, the SPAD index was obtained. At 155 days, the following were determined: SPAD, leaf nutrients and chemical attributes and substrate moisture of T1 and T2. After the production of cutieira seedlings, a simulation of planting in the field was carried out, establishing as the main condition the irrigation only from the wilting of the first leaves. The planting took place in 20-liter plastic pots, with the addition of T7 - a small plastic bag planted with the seedling. The same morphophysiological attributes of the previous step were evaluated. The Randomized Block Design was adopted, with plots of 19 plants (pre-pot phase) and 9 plants (field simulation), with 3 replications. In the statistical analysis, ANOVA analysis of variance was used, at 90% probability, preceded by the Tukey test and orthogonal contrasts. The TNT bag proved to be viable for the production of cutieira seedlings, as it did not harm their growth and quality. The application of the water-retaining polymer for the cutieira in the pre-vase phase had a morphological effect only for the plastic bags. In the simulation of planting in the field, there was no significant effect of the water-retaining polymer on the growth of the cutieira, which makes its application unnecessary. In the same experiment, T7 caused a barrier to root development, while the TNT bag proved to be effective, although it provided a greater imbalance between aerial and root biomass. Regarding the retention of water and nutrients, the water-retaining polymer proved to be unnecessary for the seedlings with seven shells, being the opposite of the TNT bag, which provided the same nutrient absorption as the seedlings in plastic bags. TNT reduced nutrient assimilation for cutieira, probably due to the high porosity of this material. On the other hand, the water-retaining polymer contributed significantly to the retention of nutrients after planting the cutieira. In short, the TNT bag is recommended, but the water-retaining polymer is not recommended for the species worked on.
Uso de aeronaves remotamente pilotadas (ARP) e geotecnologias no zoneamento edáfico em sistema silvipastoril
(Universidade Federal do Espírito Santo, 2023-11-28) Ribeiro Filho, Reinaldo Baldotto ; Oliveira, Fabricia Benda de; https://orcid.org/0000-0002-4456-0275; http://lattes.cnpq.br/9513837515797451; Oliveira, Carlos Henrique Rodrigues de; https://orcid.org/0000-0003-4829-8005; http://lattes.cnpq.br/1293627013882628; https://orcid.org/0009-0006-4744-7477; http://lattes.cnpq.br/3835863219290414; Burak, Diego Lang; https://orcid.org/0000-0002-6758-3517; http://lattes.cnpq.br/2501042964619476; Dan, Mauricio Lima; https://orcid.org/0000-0002-1483-081X; http://lattes.cnpq.br/4634459670843421; Peluzio, Telma Machado de Oliveira; https://orcid.org/0000-0003-0462-9239; http://lattes.cnpq.br/2216111713065095; Freitas, Wallisson da Silva; https://orcid.org/0009-0000-7218-4839; http://lattes.cnpq.br/4413056983902488
Performing chemical analyzes on soils and associating them with the morphological characteristics of the species that make up a productive silvipastoral system is one of the main tools for planning and managing this activity. Thus, this research had as main objective to map the spatial distribution of nutrients in the soil, in a 5-year silvipastoral system with brachiaria-brizantha (Urochloa brizantha) and jacaranda-da-bahia (Dalbergia nigra) and investigate their effect and the correlation between the morphological characteristics of these two species that make up this consortium. The work was carried out in the district of Pacotuba, Cachoeiro de Itapemirim, ES, in an experimental area of the Capixaba Institute for Research, Technical Assistance and Rural Extension (INCAPER). With the data made available in the geographic information systems environment, the working area was delimited, encompassing the cultivated area, with the purpose of serving as a basis for the creation of a regular mesh of points, which allowed the systematic sampling of soils, of trees (height and circumference) and brachiaria (leaf area, number of tillers, width and length of leaves). This procedure was carried out by collecting information on an 18 by 18 m grid that totaled 75 sampling points with known coordinates. For soil sampling, deformed samples were collected at depths of 0-10 cm in order to obtain quantitative data on soil nutrients. From high spatial resolution images obtained using remotely piloted aircraft (ARP), nutrient data from soil, pasture, forest inventory and sample plots were superimposed to assist in comparative analysis, and allowed the identification of areas with less canopy development, mainly in the northeastern portion of the area. By crossing spatialized data on soil nutrients, forest inventory and pasture sampling with data obtained using ARP, it was possible to correlate them with regard to the lesser or greater development of the system. It was also possible to analyze whether the quality of the soil influenced the diameter and height of the Bahia rosewood, as well as the leaf area, size and width of the brachiaria tillers. In this way, the use of remotely piloted aircraft, together with a georeferenced database, proved to be a powerful innovative tool to support decision-making, allowing the main areas that require additional care to be identified

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