Qualidade Industrial De Grãos De Arroz Decorrente Da Supressão Da Irrigação E Umidade De Colheita

Londero, Guilherme Pilar; Marchesan, Enio; Parisotto, Evandro; Coelho, Lísias; Soares, Camille Flores; Silva, Anelise Lencina da; Aramburu, Bruno Behenck

doi:10.15809/irriga.2015v20n3p587

Cited by 6 publications

(9 citation statements)

References 24 publications

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“…O calor favorece a formação de gesso devido ao acúmulo irregular e pouco compactado dos fotoassimilados no endosperma. Consequentemente, os grãos ficam mais frágeis durante o processamento industrial, aumentando a quebra e diminuindo o rendimento de engenho (ALI et al, 2019;LYMAN et al, 2013;LONDERO et al, 2015;SREENIVA-SULU et al, 2015;ZHAO & FITZGERALD, 2013).…”

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“…De modo geral, os resultados obtidos comprovam as observações feitas por Beckles & Thitisaksakul (2013) e Londero et al (2015), de que a aparência do grão de arroz é prejudicada pela elevação da temperatura durante o desenvolvimento do grão. Segundo Lyman et al (2013), o aumento da temperatura durante o enchimento de grãos fomenta a quebra e o gesso dos grãos e reduz a produtividade.…”

Section: Resultsunclassified

“…A aparência dos grãos de arroz é prejudicada quando o seu desenvolvimento ocorre sob temperatura elevada, tornando-os gessados, o que afeta o polimento e leva à quebra dos grãos durante o beneficiamento (ALI et al, 2019;CHEN et al, 2017;LYMAN et al, 2013;SREENIVASULU et al, 2015;ZHAO & FITZGERALD, 2013). A formação de gesso durante o enchimento dos grãos sob temperatura alta ocorre devido ao acúmulo irregular de fotoassimilados no endosperma, o que reduz a resistência do grão às forças aplicadas durante o beneficiamento, predispondo a uma quebra quando os grãos estão sendo polidos, afetando diretamente o rendimento de engenho (LONDERO et al, 2015).…”

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Produtividade e qualidade de grãos de arroz irrigado em safras com regimes térmicos distintos na floração

Souza

Marschalek

Sangoi

2020

RAC

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A temperatura é um dos fatores climáticos mais importantes para o cultivo de arroz. Temperaturas acima de 35ºC limitam a produção deste cereal, podendo acarretar prejuízos irreversíveis à produtividade. A antese é a fase mais sensível do arroz à ocorrência de altas temperaturas. Este trabalho foi conduzido com o objetivo de avaliar o desempenho agronômico e a qualidade de grãos de cinco genótipos (Epagri 109, SCS116 Satoru, SCS121 CL, SCS122 Miura e SC 676), em duas safras agrícolas (2016/17 e 2017/18), correlacionando-os com a temperatura do ar durante a antese e o enchimento de grãos. Avaliaram-se a esterilidade de espiguetas, a produtividade, a massa de 1.000 grãos e aspectos qualitativos de pós-colheita (rendimento de engenho e percentual de gesso). As temperaturas observadas na safra 2016/17 da antese até a colheita foram superiores às observadas na safra 2017/18, apresentando médias de 30,5 e 28,5ºC e temperaturas máximas de 34,3 e 30,9ºC para cada safra, respectivamente. As temperaturas mais elevadas na primeira safra reduziram a produtividade, a massa de 1.000 grãos e o rendimento de engenho. Elas também aumentaram a esterilidade de espiguetas e o percentual de gesso. A linhagem SC 676 apresentou a maior produtividade (13.070 kg ha-1), porém foi o genótipo com pior qualidade de grãos.

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Produtividade e qualidade de grãos de arroz irrigado em safras com regimes térmicos distintos na floração

Souza

Marschalek

Sangoi

2020

RAC

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“…A similar result was found in 2011/2012 but not in 2014/2015 in our sample. Londero et al (2015) reported that the water deficits after anthesis did not change the quality of grains of irrigated rice. Therefore, this characteristic explains the difference between the agricultural years caused by the different distribution of rainfall , which contributed to the maintenance of grain quality regardless of the sprinkler irrigation depth adopted in 2014/2015.…”

Section: Resultsmentioning

confidence: 99%

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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“…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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Qualidade Industrial De Grãos De Arroz Decorrente Da Supressão Da Irrigação E Umidade De Colheita

Cited by 6 publications

References 24 publications

Produtividade e qualidade de grãos de arroz irrigado em safras com regimes térmicos distintos na floração

Produtividade e qualidade de grãos de arroz irrigado em safras com regimes térmicos distintos na floração

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

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