Revista Brasileira de Engenharia Agricola e Ambiental最新文献_第5页

Soil organic carbon in no-tillage systems of different ages in Southwest Mato Grosso, Brazil 巴西马托格罗索州西南部不同年限免耕制度土壤有机碳

IF 1.2 4区农林科学

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-03-25 DOI: 10.1590/1807-1929/AGRIAMBI.V25N4P250-255

Renata M. Severiano, M. A. P. Pierangeli, N. Santos, Vinícius Xavier

{"title":"Soil organic carbon in no-tillage systems of different ages in Southwest Mato Grosso, Brazil","authors":"Renata M. Severiano, M. A. P. Pierangeli, N. Santos, Vinícius Xavier","doi":"10.1590/1807-1929/AGRIAMBI.V25N4P250-255","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N4P250-255","url":null,"abstract":"ABSTRACT The objectives of this study were to evaluate the effect of the no-tillage system on soil bulk density, soil organic carbon, and carbon stocks in Plinthic subgroups and Oxisols, located in Pontes and Lacerda, State of Mato Grosso, Brazil. The treatments were native vegetation and no-tillage systems established for 3, 8, 10, and 12 years. To analyse soil organic carbon, soils were sampled in each area, with three repetitions, at layers of 0-0.05; 0.05-0.10; 0.10-0.20; 0.20-0.40; 0.40-0.60; 0.60-1.00; 1.00-1.50 and 1.50-2.00 m. For soil bulk density, undisturbed samples were collected at layers of 0-0.20 and 0.20-0.40 m. Compared with areas of native vegetation, soil bulk density values after 12 years increased by 25% in Oxisols and 30% in the Plinthic subgroups. In Oxisols and Plinthic subgroups, respectively, organic carbon concentration was, on average, 20.57, 25.04 g kg-1 under native vegetation; 16.82, 16.59 g kg-1 after 3 years of no-tillage; 13.31, 4.96 g kg-1 after 8 years; 16.52, 14.39 g kg-1 after 10 years; and 17.97, 18.53 g kg-1 after 12 years. In both soils, the no-tillage system contributed to an increase in carbon stocks over the years, but not at depth, being generally limited to the top 0.20 m of the soils. Compared to native vegetation, after 12 years of no-tillage, carbon stocks decreased at a rate of 0.075 Mg ha-1 year-1 in the Plinthic subgroups and increased by 2.3 Mg ha-1 year-1 in Oxisols.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"2 1","pages":"250-255"},"PeriodicalIF":1.2,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73083609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Production and quality of cowpea seeds desiccated with saflufenacil and flumioxazin 氟苯那西和氟恶嗪干燥豇豆种子的生产和质量

IF 1.2 4区农林科学

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-03-01 DOI: 10.1590/1807-1929/AGRIAMBI.V25N3P209-215

J. N. Silva, A. Jakelaitis, J. Zuchi, L. S. Pereira, E. M. Costa, C. H. D. L. E. Silva

{"title":"Production and quality of cowpea seeds desiccated with saflufenacil and flumioxazin","authors":"J. N. Silva, A. Jakelaitis, J. Zuchi, L. S. Pereira, E. M. Costa, C. H. D. L. E. Silva","doi":"10.1590/1807-1929/AGRIAMBI.V25N3P209-215","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N3P209-215","url":null,"abstract":"ABSTRACT The use of desiccants allows to anticipate cowpea harvest at a time closer to physiological maturity. The desiccants saflufenacil and flumioxazin promote the drying and falling of leaves and loss of water from seeds. This study aimed to evaluate the effects of saflufenacil and flumioxazin doses applied to the cowpea crop on the production and quality of seeds at harvest and after storage for six months. Two experiments were carried out in a split-plot design (5 × 2). In the first experiment, the main factor consisted of saflufenacil doses (0, 25, 50, 100, and 150 g ai ha-1), while the second factor consisted of evaluation periods (after harvest and six months after harvest). In the second experiment, the main factor consisted of flumioxazin doses (0, 10, 20, 30, and 40 g ai ha-1) and the second factor consisted of the same evaluation periods. The treatments were designed in randomized blocks, with four replications. Saflufenacil application from 25 g ha-1 compromised the yield components and technological quality, while flumioxazin doses did not affect the yield components. Storage at 20 °C for six months decreased the physiological quality of seeds. Flumioxazin application at cowpea harvest promoted uniformity of maturity and harvest anticipation, without compromising the physiological quality after harvest.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"64 1","pages":"209-215"},"PeriodicalIF":1.2,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81182651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effects of beneficial microorganisms on upland rice performance 有益微生物对旱稻生产性能的影响

IF 1.2 4区农林科学

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-03-01 DOI: 10.1590/1807-1929/AGRIAMBI.V25N3P156-162

J. Fernandes, A. Nascente, M. Filippi, A. C. Lanna, M. A. Silva, G. Silva

{"title":"Effects of beneficial microorganisms on upland rice performance","authors":"J. Fernandes, A. Nascente, M. Filippi, A. C. Lanna, M. A. Silva, G. Silva","doi":"10.1590/1807-1929/AGRIAMBI.V25N3P156-162","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N3P156-162","url":null,"abstract":"Inoculating plants with a mix of beneficial microorganisms can significantly improve plant growth and contribute to sustainable agriculture. However, it is unclear if mixed inoculations of microorganisms provide better results than inoculations of a single beneficial microorganism. Thus, the objective of this study was to evaluate the effects of beneficial microorganisms on the performance of upland rice in a greenhouse experiment using a completely randomized design with three repetitions and 26 treatments. The treatments consisted of inoculations of Bacillus sp. (BRM32110), Serratia sp. (BRM32114), Azospirillum sp. (1381), Bacillus sp. (1301), A. brasilense (AbV5) and a pool of Trichoderma asperellum in isolation or in a mixture in addition to a control treatment (without application of microorganisms). Microorganisms significantly affected gas exchange, biomass production and nutrient accumulation in upland rice plants. The mixed treatments of BRM32114 + pool of T. asperellum and Ab-V5 + pool of T. asperellum were more effective than the other treatments, with improved gas exchange variables and nutrient concentration. The 1301 + Ab-V5 mixed treatment showed higher averages for biomass production than the other treatments, and these values were significantly different from those of the control treatment.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"22 19 1","pages":"156-162"},"PeriodicalIF":1.2,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80149387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Modeling kinetics of convective drying of Curcuma longa L. 姜黄对流干燥的建模动力学。

IF 1.2 4区农林科学

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-03-01 DOI: 10.1590/1807-1929/AGRIAMBI.V25N3P197-202

Maria Sueli Rocha Lima, Samuel V. Ferreira, L. C. D. M. Silva, D. C. D. Oliveira, P. V. Leão, M. A. P. Silva

{"title":"Modeling kinetics of convective drying of Curcuma longa L.","authors":"Maria Sueli Rocha Lima, Samuel V. Ferreira, L. C. D. M. Silva, D. C. D. Oliveira, P. V. Leão, M. A. P. Silva","doi":"10.1590/1807-1929/AGRIAMBI.V25N3P197-202","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N3P197-202","url":null,"abstract":"This study aimed to determine drying curves of land saffron (Curcuma longa L.) rhizomes at different temperatures and ventilation conditions to adjust non-linear regression models, and to calculate effective diffusion coefficients and activation energies. Saffron rhizomes were randomly collected in natura with a hoe from the soil in Rio Verde, Goiás, Brazil. They were subsequently sized, sanitized, and sliced into 2.63 ± 0.1 mm thick sections. Rhizomes were dried in an oven with forced air ventilation at 45, 55, 65 and 75 °C for 18, 14, 10 and 9 hours, respectively. As the temperature increased, drying time was reduced. Consequently, moisture content also decreased, facilitating the drying process by decreasing the energy required to remove water molecules. Among the analyzed models, the Midilli model was best adjusted to the data under different drying air conditions. Effective diffusion coefficients (D) were 9.17 × 10-11, 13.33 × 10-11, 20.09 × 10-11, and 35.89 × 10-11 m2 s-1 at 45, 55, 65 and 75 °C, respectively, increasing with higher temperatures. Activation energy for liquid diffusion during drying was 21.186 kJ mol-1.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"68 1","pages":"197-202"},"PeriodicalIF":1.2,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86175395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Soil structure and its relationship with soybean yield 土壤结构及其与大豆产量的关系

IF 1.2 4区农林科学

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-03-01 DOI: 10.1590/1807-1929/AGRIAMBI.V25N3P168-173

E. D. Bocuti, R. Amorim, Kaynara F. L. Kavasaki, M. Prado, Carlos L. R. Santos, L. A. D. L. D. Raimo

{"title":"Soil structure and its relationship with soybean yield","authors":"E. D. Bocuti, R. Amorim, Kaynara F. L. Kavasaki, M. Prado, Carlos L. R. Santos, L. A. D. L. D. Raimo","doi":"10.1590/1807-1929/AGRIAMBI.V25N3P168-173","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N3P168-173","url":null,"abstract":"ABSTRACT Soil structure conditions the interaction between the physical-hydraulic, chemical, and biological attributes and determines the potential of soil productivity. Therefore, the objective of this study was to evaluate the structure of soils of areas subjected to soybean production and the impacts of soil structure on crop yield. In total, 28 soybean production areas were selected in the State of Mato Grosso, Brazil, and analyzed for particle size, soil organic carbon and aggregates. Data of soil attributes were subjected to descriptive analysis, Pearson’s correlation and Kruskal-Wallis test at p ≤ 0.05. In general, considering the non-irrigated soybean production areas, it was found that soils with mean sand content between 100.00 and 800.10 g kg-1 and clay content between 120.00 and 627.80 g kg-1 showed average soybean yield of 3,536.36 kg ha-1. Soils that had aggregates with mean weight diameter and mean geometric diameter above 1.50 mm showed soybean yield equal to or greater than 3,370.67 kg ha-1. Soils of similar textural groups can define different levels of soybean yield, depending on characteristics such as the type of management adopted and production technology applied in the soybean production area.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"33 1","pages":"168-173"},"PeriodicalIF":1.2,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73756614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Production and sensory evaluation of dried mango 芒果干的生产及感官评价

IF 1.2 4区农林科学

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-01-01 DOI: 10.1590/1807-1929/agriambi.v25n1p44-50

Pablícia O. Galdino, A. J. M. Queiroz, R. M. F. D. Figueirêdo, Â. Santiago, P. O. Galdino

{"title":"Production and sensory evaluation of dried mango","authors":"Pablícia O. Galdino, A. J. M. Queiroz, R. M. F. D. Figueirêdo, Â. Santiago, P. O. Galdino","doi":"10.1590/1807-1929/agriambi.v25n1p44-50","DOIUrl":"https://doi.org/10.1590/1807-1929/agriambi.v25n1p44-50","url":null,"abstract":"ABSTRACT The objective of this study was to determine the best osmotic dehydration (OD) condition for slices of mango cv. Espada through a factorial experiment, evaluating water loss and water activity during the process, and then perform convective drying at different temperatures to sensorially evaluate the obtained dried mango. An experiment was conducted in a 23 factorial experiment, with three central points, to evaluate the influence of thickness (1; 1.5 and 2 cm), sucrose concentration (35; 45 and 55 ºBrix) and temperature (30, 40 and 50 ºC) on water loss and water activity during the process. Convective drying was carried out in a tray dryer at temperatures of 50, 60 and 70 ºC, with an air speed of 1.5 m s-1. The optimal OD condition was found for slices with 1 cm thickness, sucrose concentration of 55 °Brix and temperature of 50 °C. Dried mangoes produced at temperatures of 50 and 60 °C were the most accepted among the tasters for the attributes of color, appearance, odor and taste, intensity of hardness, preference and purchase intention, and can be a promising alternative for utilization of Espada mango.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"178 1","pages":"44-50"},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73013569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Drying kinetics of ‘gueroba’ (Syagrus oleracea) fruit pulp 山核桃果肉的干燥动力学研究

IF 1.2 4区农林科学

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-01-01 DOI: 10.1590/1807-1929/agriambi.v25n1p23-29

A. Jorge, W. N. Ferreira Junior, L. C. D. M. Silva, D. C. D. Oliveira, O. Resende

{"title":"Drying kinetics of ‘gueroba’ (Syagrus oleracea) fruit pulp","authors":"A. Jorge, W. N. Ferreira Junior, L. C. D. M. Silva, D. C. D. Oliveira, O. Resende","doi":"10.1590/1807-1929/agriambi.v25n1p23-29","DOIUrl":"https://doi.org/10.1590/1807-1929/agriambi.v25n1p23-29","url":null,"abstract":"The ‘Gueroba’ fruit can be used to produce flours with potential for the development of new products from the ‘Cerrado’ socio-biodiversity. The objective was to estimate the drying kinetics and determine the effective diffusion coefficient and activation energy for the pulp of ‘gueroba’ fruits subjected to different drying temperatures. ‘Gueroba’ fruits were manually pulped, removing the mesocarp with the epicarp, and this material was identified as the pulp. The material was subjected to oven drying at temperatures of 40, 50, 60 and 70 °C. Nonlinear regression models were fitted to the experimental data. The most adequate model was selected through the coefficient of determination, mean relative and estimated errors, Chi-square test, AIC and BIC. As the drying temperature increases, the processing time to achieve the same moisture content decreases, due to the increase in water diffusivity inside the product. The Midilli model showed the best fit to the experimental data obtained. The effective diffusion coefficients of the pulp of ‘gueroba’ fruits showed magnitudes between 3.11 x 10-9 to 5.84 x 10-9 m2 s-1 for temperatures from 40 to 70 °C. The activation energy of the process was 18.34 kJ mol-1.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"72 1","pages":"23-29"},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84499880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Post-harvesting of Solanum paniculatum L. leaves. Part II: Antioxidant activity and chemical composition 龙葵叶片的采收后处理。第二部分:抗氧化活性和化学成分

IF 1.2 4区农林科学

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-01-01 DOI: 10.1590/1807-1929/agriambi.v25n1p17-22

E. A. S. Martins, A. Goneli, C. Cardoso, G. L. D. Almeida, Alexandre A. Gonçalves, Cristiane B. da Silva

{"title":"Post-harvesting of Solanum paniculatum L. leaves. Part II: Antioxidant activity and chemical composition","authors":"E. A. S. Martins, A. Goneli, C. Cardoso, G. L. D. Almeida, Alexandre A. Gonçalves, Cristiane B. da Silva","doi":"10.1590/1807-1929/agriambi.v25n1p17-22","DOIUrl":"https://doi.org/10.1590/1807-1929/agriambi.v25n1p17-22","url":null,"abstract":"ABSTRACT ‘Jurubeba’ (Solanum paniculatum L.) is a medicinal plant used in traditional medicine for liver problems, in addition to being used as a cholagogue, emmenagogue, healing agent, febrifuge, anti-inflammatory, antipyretic, tonic, decongestant, diuretic and against inappetence. Thus, the objective of this study was to evaluate the antioxidant activity, concentration of phenolic compounds and total alkaloids of aqueous extracts prepared from ‘Jurubeba’ leaves subjected to drying. ‘Jurubeba’ leaves were dried at different temperatures (40, 50, 60 and 70 °C) and velocities (0.4 and 0.8 m s-1) of the drying air. Aqueous extracts of the leaves, subjected to drying, were evaluated by absorbance reading in a spectrophotometer. Increase in drying air temperature reduced the contents of total phenolics and total alkaloids of the leaf aqueous extracts, whereas increment in air velocity increased the concentration of these substances. Antioxidant activity was not influenced by the increase in air temperature at air velocity of 0.4 m s-1, but under air velocity of 0.8 m s-1 there was reduction with increasing temperature. Drying of ‘Jurubeba’ leaves can be carried out with temperature of 40 or 50 °C and drying air velocity of 0.4 m s-1.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"10 1","pages":"17-22"},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83082988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling and thermodynamic properties of the drying of tamarind (Tamarindus indica L.) seeds 罗望子(Tamarindus indica L.)种子干燥的建模和热力学性质

IF 1.2 4区农林科学

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-01-01 DOI: 10.1590/1807-1929/agriambi.v25n1p37-43

W. N. Ferreira Junior, O. Resende, G. K. Pinheiro, L. C. D. M. Silva, Diene G. Souza, K. A. D. Sousa

{"title":"Modeling and thermodynamic properties of the drying of tamarind (Tamarindus indica L.) seeds","authors":"W. N. Ferreira Junior, O. Resende, G. K. Pinheiro, L. C. D. M. Silva, Diene G. Souza, K. A. D. Sousa","doi":"10.1590/1807-1929/agriambi.v25n1p37-43","DOIUrl":"https://doi.org/10.1590/1807-1929/agriambi.v25n1p37-43","url":null,"abstract":"In the present study, the objective was to fit different models to the experimental data of drying of tamarind (Tamarindus indica L.) seeds and to select the best model, to determine the effective diffusion coefficient, activation energy and thermodynamic properties for the process during drying at different temperatures. The experiment was carried out at the Laboratory of Post-Harvest of Vegetable Products of the Instituto Federal Goiano (Federal Institute Goiano) – Campus of Rio Verde, GO, Brazil. Seeds with initial moisture content of 18 ± 0.25% dry basis were oven dried with forced air ventilation, at controlled temperatures of 45, 60, 75 and 90 °C in four repetitions. Nonlinear regression models used to describe the phenomenon were fitted to the experimental data. To represent the drying of tamarind seeds, the Midilli model was selected for the range from 45 to 60 oC and the Two terms model was selected for the range from 75 to 90 oC. The effective diffusion coefficient increases with the increase of drying air temperature, being described by the Arrhenius equation, with activation energy of 35.16 kJ mol-1. Enthalpy and entropy decreases, while Gibbs free energy increases with increasing drying temperature.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"59 1","pages":"37-43"},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85076579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Numerical-experimental comparison of radial fans applied in pneumatic transport of agricultural fertilizer spreaders 径向风机在农用撒肥机气力输送中的数值与实验比较

IF 1.2 4区农林科学

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-01-01 DOI: 10.1590/1807-1929/agriambi.v25n1p58-64

M. Fogal, G. B. Micheli, V. L. Scalon, A. Padilha

{"title":"Numerical-experimental comparison of radial fans applied in pneumatic transport of agricultural fertilizer spreaders","authors":"M. Fogal, G. B. Micheli, V. L. Scalon, A. Padilha","doi":"10.1590/1807-1929/agriambi.v25n1p58-64","DOIUrl":"https://doi.org/10.1590/1807-1929/agriambi.v25n1p58-64","url":null,"abstract":"This study presents a numerical and experimental comparison of two different types of radial fans used in an agricultural fertilizer spreader at a rotation of 4000 rpm. The numerical analysis was validated through experiments conducted on a test bench using a hot-wire anemometer for velocity measurements and a Pitot tube for pressure readings. A simulation of the agricultural fertilizer spreader was carried out after the experimental validation of the mathematical models of the radial fans on the test bench to evaluate the air distribution behavior along the application nozzles, which was compared to the experimental results. A turbulent mean-field was obtained using the Reynolds Averaged Navier Stokes (RANS) and the k-Epsilon turbulence model was used for two equations. The computational fluid dynamics software CFX 18.1 was used to solve the transport equations. Unstructured tetrahedral meshes generated by the ICEM CFD 18.1 software were used in all models. The applied method is adequate and able to reproduce the fluid-dynamic behavior of airflow in pneumatic systems of agricultural fertilizer spreaders, avoiding the need for prototypes.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"284 1","pages":"58-64"},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74980836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0