Pub Date : 2022-05-17DOI: 10.18011/bioeng.2022.v16.1055
Zanandra Boff de Oliveira, A. Knies, Samuel Wolffenbüttel
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-1) and rainfed areas (productivity 3,360.0 kg ha-1), optimizing costs regarding the mechanization of farming.
本研究旨在评估在南里奥格兰德州（巴西）中部地区的土壤气候条件下，2020/21作物年植物空间安排和水分补充对大豆产量的影响。现场实验安装在 位于Cachoeira do Sul市的南里奥格兰德州州立大学（UERGS）。补充灌溉使大豆产量增加了13%（行距0.75米）至35%（行距0.50米）。对于灌溉区（生产力5196.6 kg ha-1）和降雨区（生产力3360.0 kg ha-1。
{"title":"Influence of plant spatial arrangement and water supplementation on soybean productivit","authors":"Zanandra Boff de Oliveira, A. Knies, Samuel Wolffenbüttel","doi":"10.18011/bioeng.2022.v16.1055","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1055","url":null,"abstract":"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-1) and rainfed areas (productivity 3,360.0 kg ha-1), optimizing costs regarding the mechanization of farming.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41951703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-17DOI: 10.18011/bioeng.2022.v16.1079
G. S. Wenneck, R. Saath, Roberto Rezende, Vinícius Villa e Vila, A. Andrean, Daniele de Souza Terassi
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.
{"title":"Cucumber seedlings production: tray size impact on development","authors":"G. S. Wenneck, R. Saath, Roberto Rezende, Vinícius Villa e Vila, A. Andrean, Daniele de Souza Terassi","doi":"10.18011/bioeng.2022.v16.1079","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1079","url":null,"abstract":"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.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41928355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-17DOI: 10.18011/bioeng.2022.v16.1060
Douglas da Silva Carvalho, Kleso Silva Franco Júnior, Giselle Prado Brigante, M. Dias
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® and MathuryTM, in 4 treatments composed by the control, application of Ethrel®, application of MathuryTM, application of the combination of Ethrel® followed by the application of MathuryTM. 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® alone or combined with MathuryTM provided anticipation and uniformity of coffee fruits.
{"title":"Effects of coffee maturation regulators","authors":"Douglas da Silva Carvalho, Kleso Silva Franco Júnior, Giselle Prado Brigante, M. Dias","doi":"10.18011/bioeng.2022.v16.1060","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1060","url":null,"abstract":"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® and MathuryTM, in 4 treatments composed by the control, application of Ethrel®, application of MathuryTM, application of the combination of Ethrel® followed by the application of MathuryTM. 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® alone or combined with MathuryTM provided anticipation and uniformity of coffee fruits.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48979510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-03DOI: 10.18011/bioeng.2022.v16.1049
Mário Mollo Neto, Brayam Moreira Da Silva, Diogo de Lucca Sartori
As mudanças climáticas afetam significativamente a produção e o bem-estar das galinhas poedeiras. Nesta pesquisa foi analisado o desempenho térmico de três diferentes coberturas para galpões compostas de telhas de cerâmica, fibrocimento e termoacústica com o objetivo de averiguar a performance e os níveis de conforto térmico das diferentes coberturas, observando as condições de conforto térmico no interior do ambiente dos galpões. O ambiente interno foi monitorado por equipamentos registradores do tipo dataloggers e sensores, que coletaram dados de temperatura e umidade relativa do ar no período de fevereiro a março de 2020. Os dados do ambiente interno das instalações foram utilizados para calcular os índices de conforto para galinhas poedeiras. Com os resultados observou-se que a telha cerâmica obteve desempenho de ITGU e TE mais adequado que as demais e, a telha termoacústica apresentou desempenho inferior para o ITU em comparação as demais. Todas as telhas tiveram um resultado de CTR parecido, existindo uma diferença mínima entre elas, ocorrendo uma diferença significativa em dois períodos para telhas termoacústicas. Sendo demonstrado assim, que a telha cerâmica apresentou como sendo a de melhor desempenho térmico.
{"title":"DESEMPENHO DE TELHAS TERMOACÚSTICAS EM GALPÕES EM ESCALA REDUZIDA PARA GALINHAS POEDEIRAS","authors":"Mário Mollo Neto, Brayam Moreira Da Silva, Diogo de Lucca Sartori","doi":"10.18011/bioeng.2022.v16.1049","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1049","url":null,"abstract":"As mudanças climáticas afetam significativamente a produção e o bem-estar das galinhas poedeiras. Nesta pesquisa foi analisado o desempenho térmico de três diferentes coberturas para galpões compostas de telhas de cerâmica, fibrocimento e termoacústica com o objetivo de averiguar a performance e os níveis de conforto térmico das diferentes coberturas, observando as condições de conforto térmico no interior do ambiente dos galpões. O ambiente interno foi monitorado por equipamentos registradores do tipo dataloggers e sensores, que coletaram dados de temperatura e umidade relativa do ar no período de fevereiro a março de 2020. Os dados do ambiente interno das instalações foram utilizados para calcular os índices de conforto para galinhas poedeiras. Com os resultados observou-se que a telha cerâmica obteve desempenho de ITGU e TE mais adequado que as demais e, a telha termoacústica apresentou desempenho inferior para o ITU em comparação as demais. Todas as telhas tiveram um resultado de CTR parecido, existindo uma diferença mínima entre elas, ocorrendo uma diferença significativa em dois períodos para telhas termoacústicas. Sendo demonstrado assim, que a telha cerâmica apresentou como sendo a de melhor desempenho térmico.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41819753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-20DOI: 10.18011/bioeng.2022.v16.1080
Raphael Gallegos
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.
{"title":"Study of GHG emissions in Brazil from 1990 to 2030 using system dynamics for simulation","authors":"Raphael Gallegos","doi":"10.18011/bioeng.2022.v16.1080","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1080","url":null,"abstract":"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.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":"45 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41269723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-19DOI: 10.18011/bioeng.2022.v16.1075
Gustavo Monteiro Costa Sbampato Resende, Diogo Antonio Correa Gomes, A. Rodrigues, Alan Pereira Vilela, Tales Pereira Rodrigues
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.
{"title":"Analysis of concrete characteristics with the incorporation of construction waste aggregates","authors":"Gustavo Monteiro Costa Sbampato Resende, Diogo Antonio Correa Gomes, A. Rodrigues, Alan Pereira Vilela, Tales Pereira Rodrigues","doi":"10.18011/bioeng.2022.v16.1075","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1075","url":null,"abstract":"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.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48056152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-19DOI: 10.18011/bioeng.2022.v16.1066
Layna Amorim Mota, Ana Paula Maria da Silva, Eric Alberto da Silva, Gabriela Maria Ferreira Lima Leite, Rubens Perez Calegari, Antonio Sampaio Baptista
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 (Saccharomyces cerevisiae – 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-1, with increasing addition of 6 mg mL-1, reaching up to 246 mg mL-1 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-1 of Se and those adapted, up to 246 mg mL-1 of Se. In addition to the reduction in yeast growth speed, from the concentration of 84 mg mL-1 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-1 of Se and, after the adaptive process, they support 246 mg mL-1 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.
{"title":"Ability of the Saccharomyces cerevisiae Y904 to tolerate and adapt to high concentrations of selenium","authors":"Layna Amorim Mota, Ana Paula Maria da Silva, Eric Alberto da Silva, Gabriela Maria Ferreira Lima Leite, Rubens Perez Calegari, Antonio Sampaio Baptista","doi":"10.18011/bioeng.2022.v16.1066","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1066","url":null,"abstract":"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 (Saccharomyces cerevisiae – 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-1, with increasing addition of 6 mg mL-1, reaching up to 246 mg mL-1 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-1 of Se and those adapted, up to 246 mg mL-1 of Se. In addition to the reduction in yeast growth speed, from the concentration of 84 mg mL-1 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-1 of Se and, after the adaptive process, they support 246 mg mL-1 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.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48973580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-21DOI: 10.18011/bioeng.2022.v16.1067
Aline Mirella Fernandes, Fernanda Paes de Oliveira, D. Sartori, Silvana Gomes Gonzalez, D. D. Salgado, M. M. do Vale, D. Pereira
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. Lohmann®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.
{"title":"Wavelength lighting variation on egg quality and serum glucose","authors":"Aline Mirella Fernandes, Fernanda Paes de Oliveira, D. Sartori, Silvana Gomes Gonzalez, D. D. Salgado, M. M. do Vale, D. Pereira","doi":"10.18011/bioeng.2022.v16.1067","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1067","url":null,"abstract":"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. Lohmann®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.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44612892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-21DOI: 10.18011/bioeng.2022.v16.1063
Guilherme Serafini Amaral, Kleso Silva Franco Júnior, Giselle Prado Brigante, M. Dias
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.
{"title":"Different sources of phosphorus in coffee tree formation","authors":"Guilherme Serafini Amaral, Kleso Silva Franco Júnior, Giselle Prado Brigante, M. Dias","doi":"10.18011/bioeng.2022.v16.1063","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1063","url":null,"abstract":"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.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42126643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-08DOI: 10.18011/bioeng.2022.v16.1083
Ingrid Lorena Pereira Xavier, Mayara Alcides, Nathália Soares Barbosa, M. P. Bagagli
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%.
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