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Made available in DSpace on 2020-12-10T17:02:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-05-01 Bananas farming of prata type is the main economic activity of the Gorutuba Irrigated Perimeter in the north of Minas Gerais. The objective of this work was to characterize bananas 'Prata - Ana', 'Fhia 18' and 'BRS Platina' at the harvest point and mature, produced under different water replacements. The three banana genotypes produced with 25, 50, 75, 100 and 125% of ETc were evaluated, constituting 15 treatments, in factorial 3 (genotypes) x 5 (water replenishment). The fruits of 'BRS Platina' produced between 50 and 75% of ETc had a reduced fresh mass, length and diameter. The 'Fhia 18' in this irrigation range had larger fruits and 'Prata-Ana' was lower than the other genotypes, regardless of the level used. The green tonality of skin became more 'alive'/intense (bigger chroma) with the increase of the irrigation levels, thus remaining in 'Prata-Ana' and 'BRS Platina' in relation to 'Fhia 18'. Firmer green fruits occurred from 75% Etc, mature, the 'BRS Platinum' is firmer. At harvest point bananas of the different genotypes present fruit fresh mass, length and diameter different according to irrigation level in which they were produced, when ripe the firmness and skin color are also influenced. Epamig Norte, Nova Porteirinha, MG, Brazil Embrapa Mandioca & Fruticultura, Cruz Das Almas, BA, Brazil Univ Estadual Paulista, Fac Ciencias Agr & Vet, Sao Paulo, SP, Brazil Univ Estadual Montes Claros, Montes Claros, MG, Brazil Univ Estadual Paulista, Fac Ciencias Agr & Vet, Sao Paulo, SP, Brazil

A região Norte de Minas Gerais é a 10º maior produtora de mamão no país. Para tal, faz-se necessário o uso de irrigação de forma otimizada, contribuindo, assim na redução do dispêndio de água pela agricultura irrigada. Desta forma, o presente estudo objetivou avaliar a influência técnica de secamento parcial do sistema radicular (SPR) sobre os parâmetros de qualidade envolvidos na produção de mamão desidratado. Os mamões da variedade Tainung n.1 foram produzidos em Mocambinho - MG e cultivados com redução da lâmina calculada em 50%, com frequência de alternância de 7 dias (irrigação 1) e com redução da lâmina calculada em 50%, fixando-se apenas um lado irrigado (irrigação 2). Para o processamento, os frutos foram desidratados em secador de cabine com circulação de ar forçada de ar à 65ºC por 8, 9 e 10 horas. Os mamões desidratados foram avaliados quanto aos aspectos físicos: grau de umidade e cor instrumental (luminosidade, croma e ºhue), e químicos: sólidos solúveis e acidez titulável. Não houve interação entre os fatores tempo de secagem e irrigação para nenhuma característica estudada, porém o tempo de secagem influenciou o grau de umidade, luminosidade e a tonalidade da cor dos mamões desidratados. O croma do produto final proveniente da irrigação com redução da lâmina calculada em 50%, fixando-se apenas um lado irrigado foi superior, indicando cor mais intensa. O conteúdo de sólidos solúveis e acidez titulável não sofreu alteração após a desidratação.Abstract: The Northern region of Minas Gerais is the 10th largest producer of papaya in the country. Therefore, it is necessary the use of irrigation in an optimized way, thus contributing in reducing the amount of water for irrigated agriculture. Thus, the present study aimed to evaluate the effect of partial rootzone drying (PRD) on the quality parameters involved in the production of dehydrated papaya. The papayas of the variety Tainung No.1 were produced in Mocambinho - MG and cultivated with reduction of irrigation water depths calculated in 50%, with a frequency of alternation of 7 days (irrigation 1) and with a reduction of irrigation water in 50%, being fixed only one side irrigated (irrigation 2). For the processing, the fruits were dehydrated in a booth dryie with forced air forced circulation at 65ºC for 8, 9 and 10 hours. The dehydrated papayas were evaluated in relation to the physical aspects: degree of moisture and instrumental color (lightness, chroma and ºhue), and chemicals: soluble solids and titratable acidity. There was no interaction between the factors drying time and irrigation for any characteristic studied, but the drying time influenced the degree of humidity, brightness and color tone of dehydrated papayas. The chroma of the final product originated from irrigation with reduction of irrigation water depths calculated in 50%, being fixed only one irrigated side was higher, indicating more intense color. The content of soluble solids and titratable acidity did not change after the dehydration.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2018-08-20T14:30:41Z No. of bitstreams: 1 2010 - Maristella Martineli.pdf: 1214722 bytes, checksum: cccf10ab7c5117e38284ec2878f3a0a6 (MD5) Made available in DSpace on 2018-08-20T14:30:41Z (GMT). No. of bitstreams: 1 2010 - Maristella Martineli.pdf: 1214722 bytes, checksum: cccf10ab7c5117e38284ec2878f3a0a6 (MD5) Previous issue date: 2010-02-26 FAPERJ - Funda??o Carlos Chagas Filho de Amparo ? Pesquisa do Estado do Rio de Janeiro The experiment was conducted at the Postharvest Laboratory of UFRRJ, aiming to observe the effects of competition of the processes of irradiation and climatization sequences, on the maturation of banana 'Prata' and 'Prata an??. For the treatments, the fruits were separated into two lots. The first batch was taken to Centro Tecnol?gico do Ex?rcito (CTEx), in Rio de Janeiro, to receive doses of 0.25 kGy and 0.50 kGy in irradiator with a source of 137Cs. The second batch remained in the Postharvest Laboratory, and were underwent to exposure of calcium carbide in a dose of 7 g m-?. Part of the first batch returned to the Laboratory, being exposed under the same conditions and doses of calcium carbide. In the same manner described above, part of the second batch was taken to CTEx for exposure to the same doses of gamma radiation from the first batch. Two experiments were conducted separately. In both experiments, we evaluated the skin color, index of diseases, weight loss, firmness, peel chlorophyll, acidity, starch, soluble solids, enzymatic activity (pectinmetilesterase) and respiratory activity. In the first experiment, fruits of banana 'Prata' underwent a randomized design in factorial 8x5, except for evaluations of starch and pectinmetilesterase (8x3) and firmness (8x2). The average temperature of storage was 27 ? C. In experiment two, fruits of banana 'Prata-dwarf "were also subjected to completely randomized design with 8x5 factorial design (skin color, index and weight loss) and 8x3 for the other variables. The average temperature of storage was 23 ? C. In Experiments 1 and 2 for respiratory activity, we used a split plot design in time, with six replicates. Under the conditions of this study, the fruits obtained in the region of Angra dos Reis, Rio de Janeiro showed no positive responses in terms of quality with the application of irradiation, suggesting that the inappropriate handling of the fruits in the field, significantly influenced the results in post-harvest when the irradiation was used as a process to increase their useful life. The sequence of processes used, climatization and irradiation, regardless of the order, did not show different effects, since the fruits of both cultivars showed similar behavior during storage. More evident for the banana ?Prata-an??, treatment with gamma radiation at 0.25 kGy dose alone was effective in slowing the processes that lead to maturity O experimento foi conduzido no Laborat?rio de P?s-Colheita da UFRRJ, com os objetivos de observar os efeitos da competi??o dos processos de irradia??o e climatiza??o seq?enciais, sobre a matura??o banana ?Prata? e ?Prata-an?. Para aplica??o dos tratamentos, os frutos foram separados em dois lotes. O 1? lote foi levado ao Centro Tecnol?gico do Ex?rcito no RJ (CTEx) para receber as doses de 0,25 kGy e 0,50 kGy em irradiador com fonte de 137Cs. O 2? lote permaneceu no Laborat?rio de P?s-Colheita, no qual foram submetidos ? exposi??o do carbureto de c?lcio na dose de 7 g m-?. Parte do 1? lote retornou ao Laborat?rio de P?s-Colheita, sendo exposta, nas mesmas condi??es e doses do carbureto de c?lcio. Da mesma forma descrita anteriormente, parte do 2? lote foi levado ao CTEx para exposi??o ?s mesmas doses de radia??o gama do 1? lote. Foram realizados dois experimentos separadamente. Nos dois experimentos, avaliou-se a colora??o da casca, ?ndice de doen?as, perda de massa fresca, firmeza, clorofila total da casca, acidez titul?vel, amido, s?lidos sol?veis totais, atividade enzim?tica (pectinametilesterase) e atividade respirat?ria. No experimento 1, frutos de banana ?Prata? foram submetidos a um delineamento inteiramente casualizado, em esquema fatorial 8x5, exceto para as avalia??es de amido e pectinametilesterase (8x3) e firmeza (8x2). A temperatura m?dia de armazenamento foi de 27? C. No experimento 2, frutos de banana ?Prata-an?? tamb?m foram submetidos ao delineamento inteiramente casualizado com esquema fatorial 8x5 (cor casca, ?ndice de doen?as e perda de massa fresca) e 8x3 para as demais vari?veis. A temperatura m?dia de armazenamento foi de 23? C. Nos experimentos 1 e 2, para a atividade respirat?ria, utilizou-se esquema de parcela subdividida no tempo, com 6 repeti??es. Nas condi??es do presente trabalho os frutos obtidos na regi?o de Angra dos Reis/RJ n?o apresentaram respostas positivas em termos de qualidade com a aplica??o da irradia??o, denotando que o manejo inadequado dos frutos em campo, influenciou significativamente nos resultados em p?s-colheita quando a irradia??o foi utilizada como processo para aumentar a vida ?til dos mesmos. A sequ?ncia dos processos utilizados, climatiza??o e irradia??o, independente da ordem, n?o apresentou efeitos diferenciados, uma vez que, os frutos, de ambas as cultivares, apresentaram comportamento semelhante durante o armazenamento. De forma mais evidente para a banana ?Prata-an??, o tratamento com radia??o gama na dose 0,25 kGy isolada foi eficiente em retardar os processos que levam ao amadurecimento.