Pub Date : 2021-08-23DOI: 10.1590/1807-1929/AGRIAMBI.V25N11P787-793
Jéssica Caetano Dias Campos, Roberta Passini, Kaio F. M. do Nascimento
HIGHLIGHTS: The use of shading for dairy calves reduces thermal discomfort in tropical regions. Geosynthetics can be used as cover material in outdoor holding pens for dairy calves. The physiological responses of calves are affected by the roofing materials used in the rural installations.
{"title":"Thermography and physiology of stress in dairy calves in outdoor holding pens covered with geosynthetics","authors":"Jéssica Caetano Dias Campos, Roberta Passini, Kaio F. M. do Nascimento","doi":"10.1590/1807-1929/AGRIAMBI.V25N11P787-793","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N11P787-793","url":null,"abstract":"HIGHLIGHTS: The use of shading for dairy calves reduces thermal discomfort in tropical regions. Geosynthetics can be used as cover material in outdoor holding pens for dairy calves. The physiological responses of calves are affected by the roofing materials used in the rural installations.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"89 3 1","pages":"787-793"},"PeriodicalIF":1.2,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87712397","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}
Pub Date : 2021-08-01DOI: 10.1590/1807-1929/AGRIAMBI.V25N8P560-565
Letícia F. Oliveira, J. Corrêa, P. G. Silveira, Marina Barbosa Vilela, J. Junqueira
ABSTRACT In this study, the ‘yacon’ was dried using pulsed vacuum osmotic dehydration as pretreatment followed by vacuum drying (at different temperatures) or convective drying. The use of osmotic dehydration and vacuum drying had their influence evaluated concerning drying kinetics and quality of the final product, considering fructan retention, color, and water activity. Fick’s second law and Page’s equation were suitable for the fitting of drying evolution. It was observed that higher temperatures (60 °C) resulted in shorter drying time, higher diffusivity, and higher fructan retention when compared to 40 and 50 °C. The osmotic pretreatment and the vacuum drying differed in fructan retention (p ≤ 0.05). Moreover, the dried product, osmotically pretreated, presented a shorter drying time. The best condition was vacuum drying at 60 ºC, preceded by pulsed vacuum osmotic dehydration that resulted in fructan retention of approximately 38% in a quicker, higher diffusivity and lighter color product concerning the other tested conditions.
{"title":"Drying of ‘yacon’ pretreated by pulsed vacuum osmotic dehydration","authors":"Letícia F. Oliveira, J. Corrêa, P. G. Silveira, Marina Barbosa Vilela, J. Junqueira","doi":"10.1590/1807-1929/AGRIAMBI.V25N8P560-565","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N8P560-565","url":null,"abstract":"ABSTRACT In this study, the ‘yacon’ was dried using pulsed vacuum osmotic dehydration as pretreatment followed by vacuum drying (at different temperatures) or convective drying. The use of osmotic dehydration and vacuum drying had their influence evaluated concerning drying kinetics and quality of the final product, considering fructan retention, color, and water activity. Fick’s second law and Page’s equation were suitable for the fitting of drying evolution. It was observed that higher temperatures (60 °C) resulted in shorter drying time, higher diffusivity, and higher fructan retention when compared to 40 and 50 °C. The osmotic pretreatment and the vacuum drying differed in fructan retention (p ≤ 0.05). Moreover, the dried product, osmotically pretreated, presented a shorter drying time. The best condition was vacuum drying at 60 ºC, preceded by pulsed vacuum osmotic dehydration that resulted in fructan retention of approximately 38% in a quicker, higher diffusivity and lighter color product concerning the other tested conditions.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"124 1","pages":"560-565"},"PeriodicalIF":1.2,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79503594","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}
Pub Date : 2021-08-01DOI: 10.1590/1807-1929/AGRIAMBI.V25N8P566-572
I. B. Miranda, Í.E.A. Santos, S. Turco, S. T. D. Freitas, Amélia C. Faustino, A. C. D. A. Lins
ABSTRACT Although precooling by forced air is widely used to remove field heat from fresh table grapes, there is no knowledge about its use and efficiency. Factors influencing the process include temperature and relative air humidity, amount and initial temperature of the fruits, air velocity, and packaging. The objective of this study was to evaluate the cooling effect and efficiency of forced air cooling on table grapes in two types of packages. The experimental method used randomized blocks, in a 2 × 3 factorials, corresponding to two package types (polystyrene and cardboard) and three heights on the pallet - lower, middle, and upper - with four replicates. The temperature gradient in the direction of the airflow was evaluated. There was heterogeneity in cooling, both vertically and horizontally, on the pallets with a central heat zone for both the directions. None of the packages was suitable for fast cooling as both types of packages showed a cooling time of 15.5 h; moreover, relative humidity values were far below the ideal value for table grapes.
{"title":"Precooling of table grapes on a commercial scale as function of packaging","authors":"I. B. Miranda, Í.E.A. Santos, S. Turco, S. T. D. Freitas, Amélia C. Faustino, A. C. D. A. Lins","doi":"10.1590/1807-1929/AGRIAMBI.V25N8P566-572","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N8P566-572","url":null,"abstract":"ABSTRACT Although precooling by forced air is widely used to remove field heat from fresh table grapes, there is no knowledge about its use and efficiency. Factors influencing the process include temperature and relative air humidity, amount and initial temperature of the fruits, air velocity, and packaging. The objective of this study was to evaluate the cooling effect and efficiency of forced air cooling on table grapes in two types of packages. The experimental method used randomized blocks, in a 2 × 3 factorials, corresponding to two package types (polystyrene and cardboard) and three heights on the pallet - lower, middle, and upper - with four replicates. The temperature gradient in the direction of the airflow was evaluated. There was heterogeneity in cooling, both vertically and horizontally, on the pallets with a central heat zone for both the directions. None of the packages was suitable for fast cooling as both types of packages showed a cooling time of 15.5 h; moreover, relative humidity values were far below the ideal value for table grapes.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"450 1","pages":"566-572"},"PeriodicalIF":1.2,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77026226","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}
Pub Date : 2021-08-01DOI: 10.1590/1807-1929/AGRIAMBI.V25N8P547-552
G. G. Sousa, S. B. Sousa, Ana C. da S. Pereira, V. B. Marques, M. A. D. Silva, J. Lopes
ABSTRACT ‘Pitaya’ (Hylocereus undatus) is a fruit-bearing, climbing cactus with great food potential for the semiarid region. This study aimed to evaluate the production of ‘pitaya’ seedlings irrigated with low and high salinity water and grown in different light intensities. The experiment was conducted in a completely randomized design, in a 2 × 2 factorial arrangement, with two electrical conductivities of irrigation water: S1 - 0.3 dS m-1 (low salinity) and S2 - 5.0 dS m-1 (moderate salinity) in two environments: A1 - black net with 50% shading, and A2 - full sun, with ten replicates. The variables evaluated were plant height, main cladode diameter, above-ground biomass, root biomass, total plant biomass, number of secondary cladodes, root length, and length of secondary cladodes. The 50% shading (black net) promoted higher plant height, number of secondary shoots, and root length of the ‘pitaya’ plants. The irrigation with moderate saline water (5.0 dS m-1) reduced the number of secondary cladodes, length of root, and length of secondary cladodes. The ‘pitaya’ seedlings grown under 50% shading (black net) showed greater root dry biomass when irrigated with low-salinity water. Greater values of diameter of the primary cladode, above-ground dry biomass, and total dry biomass were observed under full sunlight and elevated saline stress.
{"title":"Effect of saline water and shading on dragon fruit (‘pitaya’) seedling growth","authors":"G. G. Sousa, S. B. Sousa, Ana C. da S. Pereira, V. B. Marques, M. A. D. Silva, J. Lopes","doi":"10.1590/1807-1929/AGRIAMBI.V25N8P547-552","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N8P547-552","url":null,"abstract":"ABSTRACT ‘Pitaya’ (Hylocereus undatus) is a fruit-bearing, climbing cactus with great food potential for the semiarid region. This study aimed to evaluate the production of ‘pitaya’ seedlings irrigated with low and high salinity water and grown in different light intensities. The experiment was conducted in a completely randomized design, in a 2 × 2 factorial arrangement, with two electrical conductivities of irrigation water: S1 - 0.3 dS m-1 (low salinity) and S2 - 5.0 dS m-1 (moderate salinity) in two environments: A1 - black net with 50% shading, and A2 - full sun, with ten replicates. The variables evaluated were plant height, main cladode diameter, above-ground biomass, root biomass, total plant biomass, number of secondary cladodes, root length, and length of secondary cladodes. The 50% shading (black net) promoted higher plant height, number of secondary shoots, and root length of the ‘pitaya’ plants. The irrigation with moderate saline water (5.0 dS m-1) reduced the number of secondary cladodes, length of root, and length of secondary cladodes. The ‘pitaya’ seedlings grown under 50% shading (black net) showed greater root dry biomass when irrigated with low-salinity water. Greater values of diameter of the primary cladode, above-ground dry biomass, and total dry biomass were observed under full sunlight and elevated saline stress.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"38 1","pages":"547-552"},"PeriodicalIF":1.2,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76147577","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}
Pub Date : 2021-06-30DOI: 10.1590/1807-1929/AGRIAMBI.V25N9P633-640
V. A. Fonseca, C. S. Rodrigues, Rodrigo R. Alvarenga, D. B. Santos, Felizarda Viana Bebé, D. S. Pina
HIGHLIGHTS: Application of biofertilizer prepared from cattle manure influences cactus pear yield. Higher doses of biofertilizer promote a reduction in the dry matter content of cactus pear cv. Gigante. Reduction of plant dry matter percentage and increase in dry biomass yield are due to the increase in green biomass yield.
{"title":"Yield of ‘Gigante’ cactus pear cultivated under biofertilizer doses and application intervals","authors":"V. A. Fonseca, C. S. Rodrigues, Rodrigo R. Alvarenga, D. B. Santos, Felizarda Viana Bebé, D. S. Pina","doi":"10.1590/1807-1929/AGRIAMBI.V25N9P633-640","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N9P633-640","url":null,"abstract":"HIGHLIGHTS: Application of biofertilizer prepared from cattle manure influences cactus pear yield. Higher doses of biofertilizer promote a reduction in the dry matter content of cactus pear cv. Gigante. Reduction of plant dry matter percentage and increase in dry biomass yield are due to the increase in green biomass yield.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"4 1","pages":"633-640"},"PeriodicalIF":1.2,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72805051","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}
Pub Date : 2021-06-30DOI: 10.1590/1807-1929/AGRIAMBI.V25N9P641-647
M. S. Costa, M. M. Rolim, G. F. Silva, Djalma E. Simões, João Paulo Bispo Santos, Ê. F. D. F. Silva
HIGHLIGHTS: The use of 600 and 1200 m3 ha-1 of vinasse in sugarcane cultivation contributes to greater biomass production. The use of high doses of vinasse can impact the environment. Application of 1200 m3 ha-1 of vinasse negatively affects the production of sugarcane in terms of alcohol and sugar.
{"title":"Biometric responses of sugarcane under high doses of vinasse","authors":"M. S. Costa, M. M. Rolim, G. F. Silva, Djalma E. Simões, João Paulo Bispo Santos, Ê. F. D. F. Silva","doi":"10.1590/1807-1929/AGRIAMBI.V25N9P641-647","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N9P641-647","url":null,"abstract":"HIGHLIGHTS: The use of 600 and 1200 m3 ha-1 of vinasse in sugarcane cultivation contributes to greater biomass production. The use of high doses of vinasse can impact the environment. Application of 1200 m3 ha-1 of vinasse negatively affects the production of sugarcane in terms of alcohol and sugar.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"11 1","pages":"641-647"},"PeriodicalIF":1.2,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81923386","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}
Pub Date : 2021-06-30DOI: 10.1590/1807-1929/AGRIAMBI.V25N9P620-625
F. A. Oliveira, F. I. G. Paiva, J. F. Medeiros, M. R. D. S. Melo, M. K. T. D. Oliveira, Ricardo C. P. da Silvas
HIGHLIGHTS: Cultivation of tomato in coconut fiber promotes greater tolerance to salinity. Higher doses of potassium and calcium increase salt stress in tomato fertigated with saline nutrient solutions. Adequate nutritional management with Ca2+ and K+ allows the use of saline water in tomatoes grown in coconut fiber.
{"title":"Salinity tolerance of tomato fertigated with different K + /Ca 2+ proportions in protected environment","authors":"F. A. Oliveira, F. I. G. Paiva, J. F. Medeiros, M. R. D. S. Melo, M. K. T. D. Oliveira, Ricardo C. P. da Silvas","doi":"10.1590/1807-1929/AGRIAMBI.V25N9P620-625","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N9P620-625","url":null,"abstract":"HIGHLIGHTS: Cultivation of tomato in coconut fiber promotes greater tolerance to salinity. Higher doses of potassium and calcium increase salt stress in tomato fertigated with saline nutrient solutions. Adequate nutritional management with Ca2+ and K+ allows the use of saline water in tomatoes grown in coconut fiber.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"11 1","pages":"620-625"},"PeriodicalIF":1.2,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82025510","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}
Pub Date : 2021-06-30DOI: 10.1590/1807-1929/AGRIAMBI.V25N9P583-590
C. ChristianJ.Mendoza, Q. AndrésJ.Peña
HIGHLIGHTS: Improving the estimating reference evapotranspiration could potentially enhance the efficiency of sugarcane water use. Reference evapotranspiration based on method used in CENICANA are underestimated compared to Penman-Monteith method. High variability in the reference evapotranspiration values. It is necessary to use a field reference method, lysimeter.
{"title":"Reference evapotranspiration estimation by different methods for the sucroenergy sector of Colombia","authors":"C. ChristianJ.Mendoza, Q. AndrésJ.Peña","doi":"10.1590/1807-1929/AGRIAMBI.V25N9P583-590","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N9P583-590","url":null,"abstract":"HIGHLIGHTS: Improving the estimating reference evapotranspiration could potentially enhance the efficiency of sugarcane water use. Reference evapotranspiration based on method used in CENICANA are underestimated compared to Penman-Monteith method. High variability in the reference evapotranspiration values. It is necessary to use a field reference method, lysimeter.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"50 1","pages":"583-590"},"PeriodicalIF":1.2,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75726556","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}
Pub Date : 2021-06-30DOI: 10.1590/1807-1929/AGRIAMBI.V25N9P648-654
Ericlis D. S. Nunes, J. Sousa, M. Brito, W. C. D. Silva, E. G. Rodrigues, J. Cordeiro
HIGHLIGHTS: The highest water consumption at cowpea occur in 3rd stage. Chlorophyll indices are not altered by the use of different types of Kc. The use of dual Kc can optimize the water use in cowpea.
{"title":"Production efficiency of ‘BRS Pujante’ cowpea using single and dual Kc for irrigation","authors":"Ericlis D. S. Nunes, J. Sousa, M. Brito, W. C. D. Silva, E. G. Rodrigues, J. Cordeiro","doi":"10.1590/1807-1929/AGRIAMBI.V25N9P648-654","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N9P648-654","url":null,"abstract":"HIGHLIGHTS: The highest water consumption at cowpea occur in 3rd stage. Chlorophyll indices are not altered by the use of different types of Kc. The use of dual Kc can optimize the water use in cowpea.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"32 1","pages":"648-654"},"PeriodicalIF":1.2,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76017434","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}
Pub Date : 2021-06-30DOI: 10.1590/1807-1929/AGRIAMBI.V25N9P612-619
Lady L. M. Custódio, B. B. Silva, C. Santos
HIGHLIGHTS: Photosynthetically active radiation (PAR) estimates, used in photosynthesis, have become essential with climate change. PAR can be related to global radiation and varies with local weather conditions. In Petrolina and Brasilia, the variation of PAR is associated, mainly with cloudiness.
{"title":"Relationship between photosynthetically active radiation and global radiation in Petrolina and Brasília, Brazil","authors":"Lady L. M. Custódio, B. B. Silva, C. Santos","doi":"10.1590/1807-1929/AGRIAMBI.V25N9P612-619","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N9P612-619","url":null,"abstract":"HIGHLIGHTS: Photosynthetically active radiation (PAR) estimates, used in photosynthesis, have become essential with climate change. PAR can be related to global radiation and varies with local weather conditions. In Petrolina and Brasilia, the variation of PAR is associated, mainly with cloudiness.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"49 1","pages":"612-619"},"PeriodicalIF":1.2,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85336940","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}
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