Qualidade de grãos de arroz irrigado colhidos com diferentes graus de umidade em função da aplicação de fungicida

Teló, Gustavo Mack; Marchesan, Enio; Ferreira, Rafael Bruck; Lúcio, Alessandro Dal’Col; Sartori, Gerson Meneghetti Sarzi; Cezimbra, Diogo Machado

doi:10.1590/s0103-84782011000600007

Cited by 5 publications

(4 citation statements)

References 9 publications

(5 reference statements)

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“…Therefore, the variation in the percentage of whole and broken grains between the different genotypes studied in the two agricultural years corroborates the results of Canellas et al (1997). Teló et al (2011) evaluated different lowland rice cultivars and found that the percentage of whole grains ranged from 63% to 65% under ideal harvesting conditions. In our sample, the percentages of whole grains in the sprinkler irrigation depth at 150% of ETc in 2011/2012 and in all sprinkler irrigation depths in 2014/2015 were similar to those found by Teló et al (2011) (61.59% and 58.97%, respectively), demonstrating that grain quality in this irrigation system was similar to that of flood irrigation.…”

Section: Resultssupporting

confidence: 80%

Classification of Rice Grains of Lowland Cultivars Grown Under Flood Irrigation and Sprinkler Irrigation

et al. 2018

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The objective of this study is to analyze the classification of rice grains of lowland cultivars grown under flood and sprinkler irrigation. The study was carried out in the agricultural years 2011/2012 and 2014/2015 using a completely randomized block design with split plots. In 2011/2012, the treatments were three lowland rice cultivars grown under flood irrigation system and five sprinkler irrigation depths with four replications. In 2014/2015, the experimental design was maintained but flood irrigation was not performed. After harvest, the samples were processed in a rice testing machine, including peeling, polishing and classification. Whole and broken grains were weighed to calculate hulling and milling yield. The classifications followed the guidelines described in Normative Instruction No. 6 of the Ministry of Agriculture, Livestock, and Supply of Brazil. In 2011/2012, there was interaction between sprinkler irrigation depths and the cultivars on hulling and milling yield, and in 2014/2015, there was significant difference in hulling yield between the cultivars. Genetic characteristics and water availability affected the classification of rice grains grown under sprinkler irrigation. In two sprinkler irrigation depths, the quality of the grains was similar to flood irrigation system. The highest milling yield was obtained in cultivar IRGA 417.

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Section: Resultssupporting

confidence: 80%

Classification of Rice Grains of Lowland Cultivars Grown Under Flood Irrigation and Sprinkler Irrigation

et al. 2018

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“…Milling yield was considered the percentage of milled and polished rice obtained by weighing the grains after processing 100 g rice with husk (Brasil, 2009); using a ricetesting machine to test rice samples. The percentage of whole grains was calculated according to the method described in Teló et al (2011).…”

Section: Methodsmentioning

confidence: 99%

“…It should be noted that works on the effects of the association between N, Si, and fungicide applications on the industrial quality of irrigated rice grains are still scarce. Some studies have related grain quality to factors such as different humidity levels and fungicide use (Teló et al, 2011), irrigation suppression (Londero et al, 2015), high temperature (Nakata et al, 2017), and shading (Deng et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Occurrence of rice blast on and grain quality of irrigated rice fertilized with nitrogen and silicates

Oliveira

Marchesan

David

et al. 2019

Pesq. agropec. bras.

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How to cite OLIVEIRA, L.M. de; MARCHESAN, E.; DAVID, R. de; WERLE, I.S.; ARAMBURU, B.B.; DONATO, G.; SILVA, A.L da; COSTA, I.F.D. da. Occurrence of rice blast on and grain quality of irrigated rice fertilized with nitrogen and silicates.Abstract -The objective of this work was to evaluate the effects of fertilization with nitrogen topdressing and silicates, as well as of the use of fungicides, on the occurrence of rice blast on panicles, milling yield, and whole grains, vitreous grains, and chalky kernels in a flood-irrigated rice cultivar sensitive to the disease. Two experiments were conducted in a randomized complete block design, in a 4×4×2 factorial arrangement, with four replicates: in experiment 1, four doses of nitrogen × four doses of calcium and magnesium silicate on soil × with and without fungicides; and, in experiment 2, four doses of nitrogen × four doses of potassium silicate applied on leaves x with and without fungicides. At the doses above 60 kg ha -1 nitrogen without fungicides, there was an increase of rice blast severity on panicles, a decrease in the percentage of whole and vitreous grains, and an increase in chalky kernels and chalky area. The greatest effects of silicates occurred without fungicides. Fungicide use reduced the severity of rice blast on panicles. Milling yield ranged from 60 to 70% in both experiments. The control of rice blast with fungicides maintains high rice grain quality, milling yield, and percentages of whole and vitreous grains.

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“…Estudos demonstram que o rendimento de grãos inteiros é uma importante característica de determinação da qualidade do arroz, valores elevados de grãos inteiros conferem maior valor comercial o produto (Odek, 2017;Teló et al, 2011). Neste estudo o elevado rendimento de grãos pode estar relacionado com a obtenção de grãos integrais, ou seja, não houve a etapa de polimento.…”

Section: Perfil Colorimétricounclassified

Redução do tempo de cocção do arroz integral através da indução de fissuras

Souza

Silva

Costa

2020

RSD

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Objetivou-se avaliar os efeitos do processo de hidratação e secagem sobre o tempo de cocção e nas características tecnológicas do arroz integral. A Metodologia de Superfície de Resposta foi usada para determinar o efeito combinado das variáveis independentes: i) Teor de umidade inicial dos grãos (14,4% a 25,6%) e ii) Temperatura de secagem (30ºC a 46ºC). Avaliou-se a porcentagem de grãos inteiros e quebrados, o índice de acidez (IA), o índice de fissuras (IF), o perfil colorimétrico e o tempo mínimo de cocção (TMC). Os resultados indicaram que não houve influência significativa na porcentagem de grãos inteiros, que apresentou valores de 97,66%, de grãos quebrados com valores de 2,41% e no IA, que variou entre 0,38 mg de KOH.g-1 a 0,54 mg de KOH.g-1. No entanto, o incremento no teor de umidade das amostras aumentou o IF, que variou entre 51% e 97% e reduziu o TMC de 20 min para 14 min. Além disso, houve aumento nos valores dos parâmetros de cor a*, b* e do croma, porém não houve influência significativa nos valores de luminosidade, ângulo de tonalidade, diferença de total de cor e diferença de tonalidade da cor, mantendo as amostras com coloração amarelo castanho semelhante à cor da amostra controle. A hidratação do arroz integral, com no mínimo 24% de umidade e secagem com temperatura na faixa de 32ºC a 38ºC possibilitou um aumento de 97% no IF e consequentemente, redução de 30% no TMC conferindo maior praticidade no preparo de arroz integral.

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Qualidade de grãos de arroz irrigado colhidos com diferentes graus de umidade em função da aplicação de fungicida

Cited by 5 publications

References 9 publications

Classification of Rice Grains of Lowland Cultivars Grown Under Flood Irrigation and Sprinkler Irrigation

Classification of Rice Grains of Lowland Cultivars Grown Under Flood Irrigation and Sprinkler Irrigation

Occurrence of rice blast on and grain quality of irrigated rice fertilized with nitrogen and silicates

Redução do tempo de cocção do arroz integral através da indução de fissuras

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