Pub Date : 2023-05-04DOI: 10.13083/reveng.v30i1.14450
Bruno de Paula Leal, M. Thebaldi, Yasmin Fernandes Silva, P. R. Pinto, I. P. Martins, R. Sales
The substrates composition can take place from different raw materials, being an influencer of the water and nutrient retention capacity, an important dynamic in the management of the cultivation in containers due to the possibility of nutrient leaching. It was aimed to quantify the Potassium adsorption to substrates with different proportions of vermiculite and peat, in addition to determining adsorption isotherms which would best fit the observed adsorption data, for contact periods of one and seven days. We carried out batch adsorption essays, using as an adsorbent media substrate prepared with different proportion of vermiculate and peat, and as adsorbate, solutions with concentrations of 0, 25, 50, 75 and 100 mg/L of K. The substrate that showed the highest adsorption capacity, then less leaching potential, was the one constituted with the largest amount of peat. The Freündlich’s isotherm best represents the K adsorption phenomenon in all the studied treatments.
{"title":"Potassium adsorption on substrates formulated with vermiculite and peat","authors":"Bruno de Paula Leal, M. Thebaldi, Yasmin Fernandes Silva, P. R. Pinto, I. P. Martins, R. Sales","doi":"10.13083/reveng.v30i1.14450","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14450","url":null,"abstract":"The substrates composition can take place from different raw materials, being an influencer of the water and nutrient retention capacity, an important dynamic in the management of the cultivation in containers due to the possibility of nutrient leaching. It was aimed to quantify the Potassium adsorption to substrates with different proportions of vermiculite and peat, in addition to determining adsorption isotherms which would best fit the observed adsorption data, for contact periods of one and seven days. We carried out batch adsorption essays, using as an adsorbent media substrate prepared with different proportion of vermiculate and peat, and as adsorbate, solutions with concentrations of 0, 25, 50, 75 and 100 mg/L of K. The substrate that showed the highest adsorption capacity, then less leaching potential, was the one constituted with the largest amount of peat. The Freündlich’s isotherm best represents the K adsorption phenomenon in all the studied treatments.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45144570","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 : 2023-04-25DOI: 10.13083/reveng.v30i1.14699
João Paulo Lima de Oliveira, I. Santos, Lorrane Ribeiro de Souza, G. S. Cândido, Marcelo Franco, Eduardo Valério de Barros Vilas Boas, E. E. Nunes
Fruits and vegetables are major sources of bioactive compounds included in human diet. The objective of the study was to evaluate the antioxidant activity and total phenolic compound content of lychee pulp. Hydroalcoholic extracts were obtained from the pulp (fresh, dried and freeze-dried), and analyzed by in vitro Folin-Ciocalteu, Fast Blue, ABTS+, Beta Carotene and Phosphomolybdenum Complex assays. The color and water activity of the pulp submitted to each dehydration treatment were also evaluated. The results obtained in the determination of total phenolic content did not differ statistically (p>0.05) between dried and freeze-dried pulp. The values obtained for the antioxidant activity by the ABTS+ method and by the phosphomolybdenum complex had a statistically significant difference. The data regarding the percentage of protection by the ?-Carotene/Linoleic Acid method showed that the dried pulp did not differ statistically from the fresh and freeze-dried pulp. However, the freeze-dried pulp presented higher antioxidant activity by the ABTS+ and Phosphomolybdenum Complex assays when compared to the other treatments (fresh and dried pulps).
{"title":"Evaluation of the antioxidant activity and total phenolic compounds of lychee pulp by different dehydration methods","authors":"João Paulo Lima de Oliveira, I. Santos, Lorrane Ribeiro de Souza, G. S. Cândido, Marcelo Franco, Eduardo Valério de Barros Vilas Boas, E. E. Nunes","doi":"10.13083/reveng.v30i1.14699","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14699","url":null,"abstract":"Fruits and vegetables are major sources of bioactive compounds included in human diet. The objective of the study was to evaluate the antioxidant activity and total phenolic compound content of lychee pulp. Hydroalcoholic extracts were obtained from the pulp (fresh, dried and freeze-dried), and analyzed by in vitro Folin-Ciocalteu, Fast Blue, ABTS+, Beta Carotene and Phosphomolybdenum Complex assays. The color and water activity of the pulp submitted to each dehydration treatment were also evaluated. The results obtained in the determination of total phenolic content did not differ statistically (p>0.05) between dried and freeze-dried pulp. The values obtained for the antioxidant activity by the ABTS+ method and by the phosphomolybdenum complex had a statistically significant difference. The data regarding the percentage of protection by the ?-Carotene/Linoleic Acid method showed that the dried pulp did not differ statistically from the fresh and freeze-dried pulp. However, the freeze-dried pulp presented higher antioxidant activity by the ABTS+ and Phosphomolybdenum Complex assays when compared to the other treatments (fresh and dried pulps).","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43386178","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 : 2023-04-18DOI: 10.13083/reveng.v30i1.14545
Daniel da Silva, Arthur Breno Rocha Mariano, Denilson Raimundo da Silva, A. B. O. D. Sousa
The evaluation and monitoring of the performance of irrigation systems are crucial in maintaining water efficiency and conservation of water and energy resources. Therefore, the objective of this study was to develop and validate an application for the coefficient of uniformity coordinators of pressurized irrigation systems. So, the UniIrrig® application was developed, using the integrated development environment Android Studio10 version 4.0.1, in JAVA language, with applicability in devices with the Android operating system. For quantitative verification, the same input values in the UniIrrig® application were also inserted in Microsoft® Excel 2010, in all uniformity conductors used in the application. For the qualitative analysis, together with the experience of the user, 68 students of the Agronomy course at the Federal University of Ceará (UFC) participated in tests in order to evaluate the perception of usability, design, usefulness, and general satisfaction of the tool. To validate the application in the field, a uniformity test was carried out on a center pivot in the municipality of Cascavel, Ceará state, with the aid of collectors (Kit Fabrimar) to deliver the applied depth and the consequent result of the distribution uniformity coefficient (DUC), of Hart (HDC) and weighted mean depth analysis. These values were compared to the results obtained in Microsoft® Excel 2010. The dynamic analysis of the data evolved in “r”= 1, thus providing perfect adaptation between the results obtained by the application and by Microsoft® Excel, finding an error equal to zero. In the qualitative assessment, 84.1% consider the application a good tool for coefficient determination. It is concluded that the UniIrrig® application, designed for the Android operating system, can be used to quantify the assessed irrigation uniformity coefficients.
评价和监测灌溉系统的性能对保持用水效率和保护水和能源资源至关重要。因此，本研究的目的是开发和验证增压灌溉系统均匀性协调系数的应用。因此，UniIrrig®应用程序是在集成开发环境Android Studio10 version 4.0.1下，以JAVA语言开发的，适用于Android操作系统的设备。为了进行定量验证，在Microsoft®Excel 2010中也将UniIrrig®应用程序中的相同输入值插入到应用程序中使用的所有均匀性导体中。为了进行定性分析，并结合用户的体验，68名ceearar联邦大学农学课程的学生参加了测试，以评估对该工具的可用性、设计、有用性和总体满意度的看法。为了验证该方法在现场的应用，在加利福尼亚州卡斯卡韦尔市的一个中心枢轴上进行了均匀性测试，在集热器(Kit Fabrimar)的帮助下，提供了应用深度以及分布均匀系数(DUC)、Hart (HDC)和加权平均深度分析的结果。将这些值与Microsoft®Excel 2010中获得的结果进行比较。数据的动态分析在“r”= 1时演进，从而使应用程序得到的结果与Microsoft®Excel得到的结果完美适配，误差为零。在定性评价中，84.1%的人认为应用程序是确定系数的好工具。由此得出结论，为Android操作系统设计的UniIrrig®应用程序可用于量化评估的灌溉均匀性系数。
{"title":"Application for evaluation of the uniformity of systems of pressurized irrigation","authors":"Daniel da Silva, Arthur Breno Rocha Mariano, Denilson Raimundo da Silva, A. B. O. D. Sousa","doi":"10.13083/reveng.v30i1.14545","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14545","url":null,"abstract":"The evaluation and monitoring of the performance of irrigation systems are crucial in maintaining water efficiency and conservation of water and energy resources. Therefore, the objective of this study was to develop and validate an application for the coefficient of uniformity coordinators of pressurized irrigation systems. So, the UniIrrig® application was developed, using the integrated development environment Android Studio10 version 4.0.1, in JAVA language, with applicability in devices with the Android operating system. For quantitative verification, the same input values in the UniIrrig® application were also inserted in Microsoft® Excel 2010, in all uniformity conductors used in the application. For the qualitative analysis, together with the experience of the user, 68 students of the Agronomy course at the Federal University of Ceará (UFC) participated in tests in order to evaluate the perception of usability, design, usefulness, and general satisfaction of the tool. To validate the application in the field, a uniformity test was carried out on a center pivot in the municipality of Cascavel, Ceará state, with the aid of collectors (Kit Fabrimar) to deliver the applied depth and the consequent result of the distribution uniformity coefficient (DUC), of Hart (HDC) and weighted mean depth analysis. These values were compared to the results obtained in Microsoft® Excel 2010. The dynamic analysis of the data evolved in “r”= 1, thus providing perfect adaptation between the results obtained by the application and by Microsoft® Excel, finding an error equal to zero. In the qualitative assessment, 84.1% consider the application a good tool for coefficient determination. It is concluded that the UniIrrig® application, designed for the Android operating system, can be used to quantify the assessed irrigation uniformity coefficients.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66373618","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 : 2023-03-21DOI: 10.13083/reveng.v30i1.14276
E. S. Santos, Plinio Antonio Guerra Filho, Sheyla Sales de Oliveira, Breno dos Santos Silva, Antonio Emanuel Souta Veras, Daniela Abreu de Souza
Among the activities affected by rainfall variability, agriculture is one of the most vulnerable. In this sense, this work aimed to relate the interannual rainfall variability with the soybean yields variability in Mata Roma municipality, Maranhão, considering dry and rainy events. For this, for the period from 2003 to 2019, data on average soybean yield and rainfall in this producing region, which is one of the main ones in the State, were analyzed. Monthly rainfall data for the period 1985-2019 were also analyzed and the dry and rainy events were identified in these two meteorological data series. The results showed that rainfall from January to May explains about 99%, on average, of the interannual variation of yields and that occurrence of dry and very humid periods disfavor the soybean crop, causing, in most cases, yields and productions far below the average for the study region. Based on the regression analysis, it was found that maximum average yield of 2942.52 kg×ha?1 was reached with an average rainfall of 1709 mm.
{"title":"Interannual rainfall variability and soybean yields in Mata Roma municipality, Maranhão","authors":"E. S. Santos, Plinio Antonio Guerra Filho, Sheyla Sales de Oliveira, Breno dos Santos Silva, Antonio Emanuel Souta Veras, Daniela Abreu de Souza","doi":"10.13083/reveng.v30i1.14276","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14276","url":null,"abstract":"Among the activities affected by rainfall variability, agriculture is one of the most vulnerable. In this sense, this work aimed to relate the interannual rainfall variability with the soybean yields variability in Mata Roma municipality, Maranhão, considering dry and rainy events. For this, for the period from 2003 to 2019, data on average soybean yield and rainfall in this producing region, which is one of the main ones in the State, were analyzed. Monthly rainfall data for the period 1985-2019 were also analyzed and the dry and rainy events were identified in these two meteorological data series. The results showed that rainfall from January to May explains about 99%, on average, of the interannual variation of yields and that occurrence of dry and very humid periods disfavor the soybean crop, causing, in most cases, yields and productions far below the average for the study region. Based on the regression analysis, it was found that maximum average yield of 2942.52 kg×ha?1 was reached with an average rainfall of 1709 mm.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49279317","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 : 2023-03-21DOI: 10.13083/reveng.v30i1.14729
Ana Carolina Nóbrega Leite, J. D. A. Cavalcante, Nagel Alves Costa, Williane Silva Pinheiro
Mentha crispa is a plant commonly used in folk medicine to treat illnesses and has wide industrial application. Dehydration has been used for several types of plants in order to reduce the levels of water content and water activity, so that it would allow na adequate storage due to the conservation of the active principles. The objective of this work is to investigate the process of drying mint in a foam layer. The foam was physically characterized in terms of density, expansion percentage, air incorporation capacity and stability. Drying was carried out according to a factorial experimental design, in which the input variables were: temperature (50, 60 and 70 °C), concentration of foaming agent (3, 5 and 7 %) and stirring time (3, 5 and 7 min); and the output variables were: drying time and water content (Xbs) of the product. The physical properties of the foam depended only on the foaming concentration. The rise in the temperature significantly reduced the drying time and the water content of the foam. The Page, Henderson & Pabis, Newton and Modified Page mathematical models were adjusted to the experimental data and Page’s model was the one that showed to be the most adequate to represent the drying phenomenon.
{"title":"Kinetics of drying in a Mentha crispa foam layer and adjustment of mathematical models","authors":"Ana Carolina Nóbrega Leite, J. D. A. Cavalcante, Nagel Alves Costa, Williane Silva Pinheiro","doi":"10.13083/reveng.v30i1.14729","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14729","url":null,"abstract":"Mentha crispa is a plant commonly used in folk medicine to treat illnesses and has wide industrial application. Dehydration has been used for several types of plants in order to reduce the levels of water content and water activity, so that it would allow na adequate storage due to the conservation of the active principles. The objective of this work is to investigate the process of drying mint in a foam layer. The foam was physically characterized in terms of density, expansion percentage, air incorporation capacity and stability. Drying was carried out according to a factorial experimental design, in which the input variables were: temperature (50, 60 and 70 °C), concentration of foaming agent (3, 5 and 7 %) and stirring time (3, 5 and 7 min); and the output variables were: drying time and water content (Xbs) of the product. The physical properties of the foam depended only on the foaming concentration. The rise in the temperature significantly reduced the drying time and the water content of the foam. The Page, Henderson & Pabis, Newton and Modified Page mathematical models were adjusted to the experimental data and Page’s model was the one that showed to be the most adequate to represent the drying phenomenon.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47748800","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 : 2022-12-20DOI: 10.13083/reveng.v30i1.14275
R. C. Borges, C. H. Beuter, Gean Marcos Souza Ferreira
According to surveys and projections by the United Nations (UN), by the year 2100, the world population will reach about 11.2 billion people. Thus, the need arises to develop modern technologies for food production aimed at the future population. Irrigation performed correctly can increase crop productivity, and automated systems are an excellent alternative for controlling irrigation processes. Among the most varied forms of powering water pumping systems, photovoltaic solar energy has become a viable and sustainable alternative for energy generation. This work aimed to build and analyze a prototype of automated irrigation powered by photovoltaic panels, using Raspberry Pi, Arduino, ESP8266 and MQTT protocol to inform the user on a mobile device about the monitoring of the system. Despite being a low-cost system, approximately R$ 2.000.00, the results obtained through the sensors showed good accuracy. With the use of IoT technology, it was possible to monitor soil moisture information that impacts the production system instantly. In addition, using part of the prototype to obtain soil moisture by sending the information via the internet, without needing for a physical connection, proved effective in sending the data.
{"title":"Prototype of automated irrigation system using raspberry pi and solar energy","authors":"R. C. Borges, C. H. Beuter, Gean Marcos Souza Ferreira","doi":"10.13083/reveng.v30i1.14275","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14275","url":null,"abstract":"According to surveys and projections by the United Nations (UN), by the year 2100, the world population will reach about 11.2 billion people. Thus, the need arises to develop modern technologies for food production aimed at the future population. Irrigation performed correctly can increase crop productivity, and automated systems are an excellent alternative for controlling irrigation processes. Among the most varied forms of powering water pumping systems, photovoltaic solar energy has become a viable and sustainable alternative for energy generation. This work aimed to build and analyze a prototype of automated irrigation powered by photovoltaic panels, using Raspberry Pi, Arduino, ESP8266 and MQTT protocol to inform the user on a mobile device about the monitoring of the system. Despite being a low-cost system, approximately R$ 2.000.00, the results obtained through the sensors showed good accuracy. With the use of IoT technology, it was possible to monitor soil moisture information that impacts the production system instantly. In addition, using part of the prototype to obtain soil moisture by sending the information via the internet, without needing for a physical connection, proved effective in sending the data.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41843205","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 : 2022-11-17DOI: 10.13083/reveng.v30i1.14283
C. H. Beuter, R. C. Borges, Rudiero Cassol Fogaca
Family farming is of fundamental importance for food supply in the domestic market. It is not enough to monitor the data for a better understanding of the entire operational chain by the small producer. It is also necessary to automate the system actuators, allowing better use of natural resources such as water intended for irrigation and reduced operating costs through adequate control of the system’s energy consumption. This article presents the development design and verification of the functionality of an automated system of a greenhouse prototype using low-cost electronic components and simple implementation. The project made it possible to create a database for future conferences by storing data collected in the cloud using the Google Drive platform and data synchronization via Wi-Fi using the ESP32 microcontroller. The prototype’s efficiency and applicability analysis took place over eight days. Data were collected regarding temperature, soil moisture, relative air humidity, water consumption of the irrigation and humidification system, and electricity consumption. The results obtained allowed the verification of the system’s functionality and the ability to store the data on the Google Drive platform, enabling remote consultation through the web server.
{"title":"Construction of a greenhouse prototype with automated control using a low-cost microcontroller and sensors","authors":"C. H. Beuter, R. C. Borges, Rudiero Cassol Fogaca","doi":"10.13083/reveng.v30i1.14283","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14283","url":null,"abstract":"Family farming is of fundamental importance for food supply in the domestic market. It is not enough to monitor the data for a better understanding of the entire operational chain by the small producer. It is also necessary to automate the system actuators, allowing better use of natural resources such as water intended for irrigation and reduced operating costs through adequate control of the system’s energy consumption. This article presents the development design and verification of the functionality of an automated system of a greenhouse prototype using low-cost electronic components and simple implementation. The project made it possible to create a database for future conferences by storing data collected in the cloud using the Google Drive platform and data synchronization via Wi-Fi using the ESP32 microcontroller. The prototype’s efficiency and applicability analysis took place over eight days. Data were collected regarding temperature, soil moisture, relative air humidity, water consumption of the irrigation and humidification system, and electricity consumption. The results obtained allowed the verification of the system’s functionality and the ability to store the data on the Google Drive platform, enabling remote consultation through the web server.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46631439","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 : 2022-11-03DOI: 10.13083/reveng.v30i1.14273
Wesley Matheus Cordeiro Fulgêncio Taveira, Paulo Roberto Arbex Silva, Arthur Gabriel Caldas Lopes, Alyne Ayla Rodrigues de Souza, Tiago Pereira da Silva Correia
The objective of this study was to evaluate the distribution of longitudinal soybean seeds under the action of different sowing velocities and conductor tubes. The test was carried out on a sticky belt test, equipped with a seed meter, Selenium model, adjusted for seeding of 12 seeds m-1, submitted to four different tubes and three sowing speeds at 5, 7 and 9 km h-1, resulting in a completely randomized experimental design in a factorial scheme. Spacings between seeds were selected, classified as acceptable, misses and multiples, in addition to spacing variations coefficient. The data obtained were submitted to analysis of variance and the averages of the Tukey test levels of 5% error probability. The sowing speed only showed statistical differences for the spacing variables and the average deviation values ??while the conductor tubes showed distinct performance, with the Selenium tube being the one with the highest percentage of average spacings acceptable (98.5%) and smaller average values of ??spacing misses, multiples and coefficient of variation (Cve): 0.67; 0.68 and 18.4% respectively.
{"title":"Longitudinal distribution of seeds under the action of different conductor tubes and sowing speeds","authors":"Wesley Matheus Cordeiro Fulgêncio Taveira, Paulo Roberto Arbex Silva, Arthur Gabriel Caldas Lopes, Alyne Ayla Rodrigues de Souza, Tiago Pereira da Silva Correia","doi":"10.13083/reveng.v30i1.14273","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14273","url":null,"abstract":"The objective of this study was to evaluate the distribution of longitudinal soybean seeds under the action of different sowing velocities and conductor tubes. The test was carried out on a sticky belt test, equipped with a seed meter, Selenium model, adjusted for seeding of 12 seeds m-1, submitted to four different tubes and three sowing speeds at 5, 7 and 9 km h-1, resulting in a completely randomized experimental design in a factorial scheme. Spacings between seeds were selected, classified as acceptable, misses and multiples, in addition to spacing variations coefficient. The data obtained were submitted to analysis of variance and the averages of the Tukey test levels of 5% error probability. The sowing speed only showed statistical differences for the spacing variables and the average deviation values ??while the conductor tubes showed distinct performance, with the Selenium tube being the one with the highest percentage of average spacings acceptable (98.5%) and smaller average values of ??spacing misses, multiples and coefficient of variation (Cve): 0.67; 0.68 and 18.4% respectively.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42272452","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 : 2022-10-26DOI: 10.13083/reveng.v30i1.14272
Camilla Sena da Silva, Caroline Fernanda Albuquerque, A. P. D. Coelho, Cristiane Fernandes Lisboa, M. P. Gonzatto
Due to the increasing resistance of pests to chemical insecticides and the negative consequences arising from the use of chemicals, such as environmental contamination and health hazards, alternative methods of control need to be studied. In nature, essential oils play an important role in protecting plants as antibacterials, antivirals, antifungals, insecticides, and also against herbivores by reducing their appetite for such plants. Secondary metabolites produced by medicinal or aromatic plants have the capacity for behavioral modification, growth and feeding reduction, besides exerting toxic and sterility effects on insects considered as pests, thus being a control strategy, besides being an alternative to the chemical products available on the market. Thus, the present review aimed to elucidate the use of essential oils in the control of various grain pests by exploring their bioactive compounds and addressing the main methods of encapsulation for the proper storage of these oils.
{"title":"Essential oils with contact insecticidal activity and encapsulation methods: a literature review","authors":"Camilla Sena da Silva, Caroline Fernanda Albuquerque, A. P. D. Coelho, Cristiane Fernandes Lisboa, M. P. Gonzatto","doi":"10.13083/reveng.v30i1.14272","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14272","url":null,"abstract":"Due to the increasing resistance of pests to chemical insecticides and the negative consequences arising from the use of chemicals, such as environmental contamination and health hazards, alternative methods of control need to be studied. In nature, essential oils play an important role in protecting plants as antibacterials, antivirals, antifungals, insecticides, and also against herbivores by reducing their appetite for such plants. Secondary metabolites produced by medicinal or aromatic plants have the capacity for behavioral modification, growth and feeding reduction, besides exerting toxic and sterility effects on insects considered as pests, thus being a control strategy, besides being an alternative to the chemical products available on the market. Thus, the present review aimed to elucidate the use of essential oils in the control of various grain pests by exploring their bioactive compounds and addressing the main methods of encapsulation for the proper storage of these oils.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48211486","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 : 2022-10-24DOI: 10.13083/reveng.v30i1.14267
J. R. Chaves Neto, F. S. Rodrigues, Luciana Luft, T. Confortin, Izelmar Todero, M. S. N. Santos, G. Zabot, M. Mazutti, M. Tres
Senna obtusifolia presents structures favorable to the effects of the dormancy phenomenon, presenting low germination rates for a certain period. This panorama can be solved by the dormancy-breaking process, which is caused by the exposure of the seed to adverse conditions that stimulate the germination process. Accordingly, this study aimed to evaluate the efficiency of different methods to overcome dormancy in Senna obtusifolia (L.) H. S. Irwin & Barneby seeds. A completely randomized design (CRD) was the experimental design adopted, with four treatments and eight replications of 25 seeds. The treatments consisted of mechanical scarification, water imbibition, and immersion in hot water. In this study, a statistically significant difference was seen between treatments for all parameters, where the treatment under mechanical scarification was the most effective for promoting germination (99 ± 1.51% of germinated seeds). Furthermore, the treatment presented the most promising results for average shoot length (ASL) (43.95 ± 8.66 mm), root length (ARL) (28.09 ± 5.27 mm), total fresh mass (MF) (1.97 ± 0.10 g), and total dry mass (MS) (0.37 ± 0.03 g). The mechanical scarification of seeds favored germination and this treatment was the most efficient for the process of overcoming the dormancy of S. obtusifolia seeds.
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