Revista Brasileira de Engenharia de Biossistemas <table style="height: 190px;" width="800"> <tbody> <tr> <td width="141"> <h2 class="title"> </h2> <h2 class="title"> <img src="" /></h2> </td> <td width="425">The <em>Brazilian Journal of Biosystems Engineering</em> (BIOENG) publishes original articles that present theoretical, experimental, computational advances and innovations in the areas of agricultural and environmental systems, bringing applications for the sustainable development of agricultural and animal biosystem productions. BIOENG journal publishes interdisciplinary scientific articles and prioritizes issues related to Sustainable Development Goals (SDGs) of the United Nations (UN).</td> </tr> </tbody> </table> UNESP, Campus de Tupã en-US Revista Brasileira de Engenharia de Biossistemas 1981-7061 <p>Authors who publish in this journal agree to the following terms:</p> <p>a) Authors retain the copyright and grant the journal the right of first publication, with the work simultaneously licensed under the Creative Commons Attribution License that allows the sharing of the work with recognition of authorship and initial publication in this journal.</p> <p>b) Authors are authorized to assume additional contracts separately, for non-exclusive distribution of the version of the work published in this journal (eg, publish in an institutional repository or as a book chapter), with recognition of authorship and initial publication in this journal.</p> Performance of thermoacoustic tiles in sheds on a reduced scale for layering chickens <p>Climate change significantly affects the production and welfare of laying hens. In this research, the thermal performance of three different roofs for sheds composed of ceramic, fiber-cement, and thermo-acoustic tiles was analyzed in order to ascertain the performance and thermal comfort levels of the different roofs, observing the thermal comfort conditions inside the environment of the buildings. sheds. The indoor environment was monitored by recording equipment such as data loggers and sensors, which collected temperature and relative humidity data from February to March 2020. The data from the indoor environment of the facilities were used to calculate the comfort indexes for chickens laying hens. With the results, it was observed that the ceramic tile had more adequate BGHI and ET performance than the others, and the thermoacoustic tile presented a lower performance for the THI compared to the others. All tiles had a similar RTL result, with a minimal difference between them, with a significant difference occurring in two periods for thermoacoustic tiles. Thus, it is demonstrated that the ceramic tile had the best thermal performance.</p> Mario Mollo Neto Brayam Moreira Da Silva Diogo de Lucca Sartori Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-05-03 2022-05-03 16 10.18011/bioeng.2022.v16.1049 Study of GHG emissions in Brazil from 1990 to 2030 using system dynamics for simulation <div> <p>This work studied five sectors which are responsible for GHG emissions in Brazil, namely: Agriculture, Energy, Land-use Change, Industrial Processes, and Waste. In addition to emissions, the Brazilian National Energy Balance was studied to understand the relationship between the energy matrix and GHG emissions. This entire study was developed using the System Dynamics methodology and, at the end, two scenarios were proposed. In the first scenario, it is possible to observe how GHG emissions are distributed in Brazil, while in the second scenario, it is possible to observe a reduction of about 48.9% of emissions in the country, related to the reduction of Land-use Change and Forestry together with the Energy Sector.</p> </div> <div> <p class="Simples"><strong><span lang="EN-US"> </span></strong></p> </div> <div> <p class="Simples"> </p> </div> Raphael Gallegos Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-04-20 2022-04-20 16 10.18011/bioeng.2022.v16.1080 Different sources of phosphorus in coffee tree formation <p>Arabica coffee is one of the main crops in Brazil and requires balanced nutrition. Among the nutrients, phosphorus is essential in planting so that seedlings can be successful in the after transplanting, allowing a good development and growth. The use of quality seedlings and balanced fertilization is essential for this, however, Brazilian soils, due to their mineral origins, have the characteristic of adsorbing part of the applied phosphorus, making it unavailable to plants. Therefore, the objective of this work is to verify if the sources of phosphorus when applied to the soil can be more efficient in relation to the growth and initial development of the coffee tree. The study was carried out in randomized blocks with five treatments and five replications: T1 - formulation 02-10-00; T2 - formulation 00-15-00; T3 - formulation 10-49-00; T4 - formulation 00-19-00; T5 - control, where phosphorus was not applied. After 120 days, after planting, the characteristics of the seedlings were measured, verifying root length, plant height, fresh matter, dry matter and leaf area index. Data were submitted to analysis of variance and Scott-Knott test with 5% probability. It was concluded that the treatments T1 (02-10-00) and T3 (10-49-00) provided better coffee development, proving to be a valid option for the coffee grower aiming at a better performance of phosphorus (P), an element of great complexity in plant nutrition in tropical soils.</p> Guilherme Serafini Amaral Kleso Silva Franco Junior Giselle Prado Brigante Marcio de Souza Dias Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-03-21 2022-03-21 16 10.18011/bioeng.2022.v16.1063 Analysis of concrete characteristics with the incorporation of construction waste aggregates <p>In order to reuse civil construction materials, research is carried out to obtain an efficient recycled concrete, promoting sustainability. The objective of this work is to compare the compressive strengths of the concrete specimen, with conventional and recycled aggregates, as well as the influence of granulometry on the strength and physical properties of the aggregates. For this purpose, aggregates from civil construction waste were incorporated into the concrete, replacing part of the coarse aggregates. Specimens were made with the following replacement percentages: 0%, 5%, 10%, and 15%, for multiple comparisons. The control group had no replacement of conventional aggregates by recycled ones (0%). The following tests were carried out: granulometric, density, water absorption, compressive strength, and slump test. Recycled concrete presents itself as a viable option in non-structural concretes, presenting greater efficiency in the compressive strength test at granulometry of 4.75 – 9.50 mm, with 15% incorporation.</p> Gustavo Monteiro Costa Sbampato Resende Diogo Antonio Correa Gomes Adriano Rodrigues Alan Pereira Vilela Tales Pereira Rodrigues Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-04-19 2022-04-19 16 10.18011/bioeng.2022.v16.1075 Influence of plant spatial arrangement and water supplementation on soybean productivit <p>The present study aims to evaluate the influence of plant spatial arrangement and water supplementation on soybean yield for the 2020/21 crop year, in the edaphoclimatic conditions of the central region of Rio Grande do Sul (Brazil). The field experiment was installed in an experimental area of ​​ the Rio Grande do Sul State University (UERGS) in the city of Cachoeira do Sul. Supplementary irrigation provided positive increases in soybean yield between 13% (row spacing of 0.75 m) and 35% (row spacing of 0.50 m). The conventional row spacing of 0.50 m can be recommended as a spatial arrangement strategy for both irrigated areas (productivity 5,196.6 kg ha<sup>-1</sup>) and rainfed areas (productivity 3,360.0 kg ha<sup>-1</sup>), optimizing costs regarding the mechanization of farming.</p> Zanandra Boff de Oliveira Alberto Eduardo Knies Samuel Wolffenbüttel Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-05-17 2022-05-17 16 10.18011/bioeng.2022.v16.1055 Evaluation of the application of water kefir grains in the decolouration of solutions containg textile dye <p>One of the main environmental problems presented by the textile industry is the generation of effluents containing synthetic dyes. Because of that, studies have been carried out in order to remove or degrade the dyes present in wastewater and thus, the adsorption process in polymeric matrices has been highlighted due to its low cost and high efficiency in bioremediation. In this context, it was verified the potential of biodegradation of the anthraquinone C. I. Reactive Blue 4 HFG textile dye (Dianativo®) by water kefir grains, as well as the application of the insoluble exopolysaccharide produced by the grains as an adsorbent of the dye, evaluating the effect of pH and initial concentration of dyes in the reduction of staining in a model system. The grains and their insoluble polysaccharide matrix were presented as capable of decolourizing dye solutions under the evaluated conditions, reducing the dye concentration in the solution by up to 92%.</p> Ingrid Lorena Pereira Xavier Mayara Alcides Nathália Soares Barbosa Marcela Bagagli Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-03-08 2022-03-08 16 10.18011/bioeng.2022.v16.1083 Ability of the Saccharomyces cerevisiae Y904 to tolerate and adapt to high concentrations of selenium <p>The alcoholic fermentation industry generates a large surplus of yeasts, which, in turn, have the ability to bioaccumulate minerals and enable their bioavailability after cell autolysis. Among these minerals, selenium (Se) stands out, which participates in the formation of antioxidant enzymes. The objectives of the work were to define the minimum and maximum concentration of Se that yeasts (<em>Saccharomyces cerevisiae</em> – Y904) support and the concentrations that they tolerate once adapted. To this end, a test of tolerance to Se was carried out, using treatments with different concentrations of Se. The adaptive process started at the maximum concentration obtained in the tolerance test of 60 mg mL<sup>-1</sup>, with increasing addition of 6 mg mL<sup>-1</sup>, reaching up to 246 mg mL<sup>-1</sup> of Se. The macromorphological characteristics and number of colony forming units (CFU) were evaluated. It was identified that yeasts without adaptation grew on substrate containing up to 60 mg mL<sup>-1</sup> of Se and those adapted, up to 246 mg mL<sup>-1 </sup>of Se. In addition to the reduction in yeast growth speed, from the concentration of 84 mg mL<sup>-1</sup> of Se in the medium, morphological changes in colony color were observed. It is concluded that non-adapted yeasts support up to 60 mg mL<sup>-1</sup> of Se and, after the adaptive process, they support 246 mg mL<sup>-1</sup> of Se in the medium after the adaptive process, which adds value to the final product, and makes yeasts suitable for human nutrition as a supplement or even in the formulation of probiotics.</p> Layna Amorim Mota Ana Paula Maria da Silva Eric Alberto da Silva Gabriela Maria Ferreira Lima Leite Rubens Perez Calegari Antonio Sampaio Baptista Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-04-19 2022-04-19 16 10.18011/bioeng.2022.v16.1066 Cucumber seedlings production: tray size impact on development <p>The size of the tray in seedling production has a direct influence on the area of ​​root development and availability of resources, such as water as well as nutrients, with a potential impact on the seedling final quality. The objective of this work was to analyse the impact of the tray size on the development of cucumber seedlings. As such, this study was developed in two experiments: in the first, seedlings produced in trays with 50 and 128 cells were compared, while in the second, trays with 50, 98, and 128 cells were considered. For that, polyethylene trays and commercial substrate were used. The trays were kept in a greenhouse, and evaluations were carried out at 21 days after sowing. Morphological development and SPAD index were analysed. The data were submitted to ANOVA and the means compared by the Tukey test (0.05). Linear correlation was performed between the analysed variables. The best development of cucumber seedlings was obtained by adopting trays with 50 cells. Cucumber seedlings produced in trays with a higher number of cells show reduced development, mass accumulation and lower photosynthetic activity.</p> Gustavo Soares Wenneck Reni Saath Roberto Rezende Vinicius Villa e Vila André Felipe Barion Alves Andrean Daniele de Souza Terassi Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-05-17 2022-05-17 16 10.18011/bioeng.2022.v16.1079 Effects of coffee maturation regulators <p>The maturation of coffee fruits is a concern of coffee growers, as it directly influences the efficiency of the harvest and can interfere with the quality of the product. Therefore, the use of maturation regulators that act by controlling the speed of maturation are being increasingly used. As such, the objective of this work was to evaluate the effects of the regulators Ethrel<sup>® </sup>and Mathury<sup>TM</sup>, in 4 treatments composed by the control, application of Ethrel<sup>®</sup>, application of Mathury<sup>TM</sup>, application of the combination of Ethrel<sup>®</sup> followed by the application of Mathury<sup>TM</sup>. Thus, the maturation stage of the fruits, the type, and the final grade regarding the quality of the drink were evaluated. After that, the data of the evaluated characteristics were submitted to statistical analysis by the Scott-Knott test at 5% probability. The maturation regulators used in this experiment did not interfere with the quality of the product and the classification of the coffee. However, treatments with application of Ethrel<sup>®</sup> alone or combined with Mathury<sup>TM</sup> provided anticipation and uniformity of coffee fruits.</p> Douglas da Silva Carvalho Kleso Silva Franco Junior Giselle Prado Brigante Marcio de Souza Dias Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-05-17 2022-05-17 16 10.18011/bioeng.2022.v16.1060 Work accidents in agriculture: a study of Brazilian soybean production <p>Soybean cultivation has great economic and social impacts, meaning it offers many job opportunities. Studying the number of accidents in this field is essential for a better understanding of the quality of work related to it. Therefore, the purpose of this article is to verify if, in the field of soybean cultivation, there are correlations between productivity, product price, and the number of accidents, between the years of 1999 and 2018, in Brazil. For that, Pearson’s method was applied, allowing for a bivariate analysis that can quantify a degree of strength between different variables. As a result, it was found that soybean production and price are linearly related to the number of work-related accidents in cultivation. Therefore, it is concluded that, if an increase in price or production occurs, it will lead to an increase in accidents, and the opposite will also happen.</p> Paloma Couto Vieira De George Silva José Moisés dos Santos Alves Irineu de Brito Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-05-17 2022-05-17 16 10.18011/bioeng.2022.v16.1085 Wavelength lighting variation on egg quality and serum glucose <p>This observational study verified the effects of monochromatic lighting for three monochromatic light spectra on the production and quality of laying hen eggs and blood parameters, as probable indicators of environmental stress. <em>Lohmann</em><sup>®</sup>29-week-old birds were divided into groups of 20 animals, housed in three experimental houses with different lighting treatments (blue, green and red), and monitored for 90 days. Were analysed 4,443 eggs, and the values of the following measurements were extracted: egg weight (g), albumen height (mm), shell resistance (kgf/cm²), shell thickness (mm), Haugh unit, specific gravity (g/cm³), and egg shape. Blood samples were collected from the birds at the beginning and at the end of the study period. The levels of total plasma protein and the heterophile/lymphocyte ratio remained within the normal range. Laying hens housed under blue and red lighting had higher egg production (per hen) and showed better egg quality results. Red lighting stood out for providing significantly better shell resistance than other treatments. Glucose differed between treatments, with a drop in blood glucose levels as the environment light wavelength increased. The quality of the eggs was affected differently by the sources of monochromatic lighting. Correct lighting management promotes better health for birds and increased egg production and quality.</p> Aline Mirella Fernandes Fernanda Paes de Oliveira Diogo de Lucca Sartori Silvana Gomes Gonzalez Douglas D'Alessandro Salgado Marcos Martinez do Vale Danilo Florentino Pereira Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-03-21 2022-03-21 16 10.18011/bioeng.2022.v16.1067 Relationships between leaf water potential and soil water potential in grasses subjected to water stress <p>For grasses and other crops in general, soil water potential has been widely studied to determine if there is a deficit or excess of water content in the soil. However, the plant water absorption process is not only modulated by soil water potential but also by the combination of meteorological, soil depth, and crop canopy factors, which could be elucidated through water relations responses. The objective of this work was to compare the water relations of grass species established in different soil depths and subjected to water stress. Santo Agostinho (<em>Stenotaphrum secundatum</em>), Esmeralda (<em>Zoysia japonica</em>), Tanzania (<em>Panicum maximum</em>) and Tifton 85 (<em>Cynodon</em> spp.) were used in this trial. The four species of grasses were tested in four different soil rooting depths: 10, 20, 30 and 40 cm. The grasses were irrigated at soil moisture field capacity level, until the time of imposing the water stress period. Soil depth had a direct influence on leaf water potential and soil water potential. Moreover, correlation coefficients are higher in deeper soil profiles. The strongest correlations between leaf water potential and soil water potential were found in the deeper soil depth treatments. Therefore, for the soil depth treatment of 40 cm, the average R² for the four species was 0.55, the highest being 0.70 in Tanzania grass. It is possible to relate leaf water potential and soil water potential independently of the grass species used or the depth of soil available to the roots, which would allow the creation of new irrigation management strategies.</p> Sergio André Tapparo Rubens Duarte Coelho Jéfferson Costa Sérgio Weine Paulino Chaves Carlos Alberto Quiloango-Chimarro Everton dos Santos de Oliveira Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-06-17 2022-06-17 16 10.18011/bioeng.2022.v16.1091 Dripper clogging: emphasis on the problem and how to minimize impact <h1>Irrigation is a useful tool to achieve a better productivity and quality foods, which contributes to a higher efficient use of agriculture land. Drip irrigation is characterized by higher application efficiency, providing an efficient control of the irrigation depth required. Moreover, it has advantages such as lower evaporation loss and higher crop yields when associated with fertigation. However, dripper clogging is pointed out by several authors as the main limiting factor for a rapid adoption of drip irrigation on a larger scale. Emitter clogging susceptibility depends basically on five parameters: water quality, filtration system, fertilizer quality, labyrinth architectural layout and maintenance procedures. The adoption of chemical treatments helps to control biological agents and precipitates, making it possible to minimize the risk of clogging. This paper aims to understand how drip clogging process occurs, providing scientific arguments and support on the development of a standardized test pattern, making progress in order to identify commercial emitters that are less susceptible to clogging under field conditions.</h1> Isabela Alvarenga Almeida Diego José de Sousa Pereira Jéfferson de Oliveira Costa Carlos Alberto Quiloango-Chimarro Rubens Duarte Coelho Copyright (c) 2022 Revista Brasileira de Engenharia de Biossistemas 2022-06-17 2022-06-17 16 10.18011/bioeng.2022.v16.1095