Temperaturas de secagem na integridade física, qualidade fisiológica e composição química de sementes de arroz

Menezes, Nilson Lemos de; Pasqualli, Leandro Lourenço; Barbieri, Ana Paula Piccinin; Vidal, Maquiel Duarte; Conceição, Gerusa Massuquini

doi:10.1590/s1983-40632012000400011

Cited by 25 publications

(16 citation statements)

References 8 publications

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“…These spaces voids can accelerate dehydration and possibly the leakage of cellular content, reducing the seed weight (Eichelberger & Portella 2003, Menezes et al 2012.…”

Section: Resultsmentioning

confidence: 99%

“…Similar results were obtained by Alfonso Júnior & Corrêa (2000), who reported a reduction of first count of bean seeds, independently of moisture content at harvest, with increases in the drying air temperature. Also, Menezes et al (2012) reported a negative effect of increasing the drying temperature to 50 ºC on the first count of rice seed germination, when harvested with a moisture content of approximately 24 %. Moreover, when subjected to lower drying air temperatures (30 ºC and 35 ºC), seeds harvested with a higher moisture content showed a higher first count.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Moisture content at harvest and drying temperature on bean seed quality

Scariot

Tiburski

Júnior

et al. 2017

Pesqui. Agropecu. Trop.

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The physical quality and physiological performance of seeds may be influenced by numerous factors, including the moisture content at harvest and drying temperature. This study aimed at evaluating the physical quality and physiological performance of black bean seeds (BRS Campeiro cultivar), depending on the moisture content at harvest and drying air temperature. The experiment was conducted under a completely randomized design, in a 3 x 5 (moisture content at harvest x drying air temperature) factorial arrangement, with four replications. The samples were collected when the seeds reached the moisture contents of 35.2 %, 25.2 % and 16.6 %. After harvesting, the seeds were subjected to drying at temperatures of 30 ºC, 35 ºC, 40 ºC, 45 ºC and 50 ºC. The physical quality of the seeds was evaluated by determining the 1,000-seed weight and hectoliter weight. The physiological performance was evaluated by the germination speed index, germination first count, accelerated aging, dry matter, seedling shoot and root length and electrical conductivity. The increase in the drying temperature, regardless of the moisture content at harvest, reduces the physical quality and physiological performance of the seeds. When subjected to drying temperatures lower than 40 ºC, the seeds obtained from the earliest harvests show a better physical quality and physiological performance.

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“…These spaces voids can accelerate dehydration and possibly the leakage of cellular content, reducing the seed weight (Eichelberger & Portella 2003, Menezes et al 2012.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Moisture content at harvest and drying temperature on bean seed quality

Scariot

Tiburski

Júnior

et al. 2017

Pesqui. Agropecu. Trop.

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“…O aumento na temperatura de secagem resulta no aumento da percentagem de sementes com fissuras que, associado a outros efeitos influenciados pela secagem, afeta negativamente a germinação (Menezes et al, 2012b).…”

Section: Resultsunclassified

Qualidade fisiológica das sementes de sorgo sacarino submetidas à secagem em diferentes condições de ar

Ullmann

Resende

Chaves

et al. 2015

Rev. bras. eng. agríc. ambient.

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R E S U M OObjetivou-se, com este trabalho, analisar a qualidade fisiológica das sementes de sorgo sacarino submetidas à secagem em diferentes condições de ar. A secagem do sorgo sacarino foi realizada mantendo-se as temperaturas controladas de 40, 55, 70, 85 e 100 °C e umidades relativas de 28,4; 18,6; 12,2; 7,3 e 3,1%, durante os períodos de 3,0; 1,75; 1,42; 1,08 e 0,83 h, respectivamente. Depois da secagem as sementes foram submetidas às análises de condutividade elétrica, porcentagem de germinação, primeira contagem da germinação, índice de velocidade de germinação (IVG), porcentagem de emergência, primeira contagem da emergência e índice de velocidade de emergência (IVE). Constata-se que o aumento da temperatura do ar de secagem promove maior danificação nas sementes, pelo aumento da condutividade elétrica da solução. A porcentagem de germinação, IVG, porcentagem de emergência e o IVE, tiveram seus valores reduzidos pelo incremento de temperatura. Conclui-se que a qualidade fisiológica das sementes de sorgo sacarino é afetada pela temperatura do ar de secagem e que as temperaturas mais elevadas promovem maiores danos às sementes podendo ser realizada a secagem até a temperatura do ar de 55 °C. Physiological quality of sweet sorghum seeds dried under different conditions of air A B S T R A C TThe aim of the study was to analyse the physiological quality of sweet sorghum seeds dried at different conditions of air. Drying of sweet sorghum seeds was performed at controlled air temperatures of 40, 55, 70, 85 and 100 °C and relative humidity of 28.4, 18.6, 12.2, 7.3 and 3.1%, during 3.0; 1.75; 1.42; 1.08 e 0.83 h, respectively. The seeds after drying were subjected to analysis of electrical conductivity, germination, first count of germination, germination speed index (GSI), germination percentage, emergence and emergence rate index (ERI). It was found that increasing the temperature of the drying air promotes greater damage to the seeds by increasing the electrical conductivity of the solution. The percentage of germination, GSI, emergence percentage and ERI were reduced with increase in temperature. It is concluded that the seed quality of sweet sorghum is affected by drying air temperature, and that higher temperatures promote greater damage to the seed; drying can be performed until the air temperature of 55 °C. Palavras-chave:danificação germinação vigor

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“…Após a semeadura, os rolos foram colocados em sacos plásticos e vedados com fita adesiva, sendo mantidos em câmara regulada a 10 ºC, durante sete dias (MENEZES et al, 2012). Após este período, os rolos foram transferidos para um germinador, à temperatura constante de 25 ºC, onde as avaliações foram realizadas segundo as RAS (BRASIL, 2009).…”

Section: Methodsunclassified