Qualidade física e fisiológica de sementes de braquiárias comercializadas em Campo Grande-MS

Laura, Valdemir Antônio; Arias, Edison Rubens Arrabal; Chermouth, Katyuce da Silva; Rossi, Tiago

doi:10.1590/s1413-70542009000100045

Cited by 14 publications

(16 citation statements)

References 5 publications

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“…Similarly, the germination test, even though it is not a seed vigor test, maintained the decreasing order of classification of lots in terms of physiological potential, from lot 1 to 9; nevertheless, the germination test was more accurate than the previous test because it separated the seed lots into four classes of: high (1, 2 and 3), medium-high (4 and 5), medium-low (6) and low (7, 8 and 9) physiological potential. Other studies reported results similar to the findings of the present study, regarding the efficiency of the germination test in differentiating commercial lots of B. brizantha seeds (LAURA et al, 2009;OHLSON et al, 2011).…”

Section: Continuationsupporting

confidence: 91%

“…Although studies on vigor tests for grass seeds, including sweet corn (COIMBRA et al, 2009), maize (GRZYBOWSKI et al, 2015 and millet (MACHADO et al, 2012) seeds, advocate that these tests allow differentiating seed lots with similar germination percentages, this premise is difficult to confirm in forage grasses because seed lots of these species have differences in germination larger than those assessed in large-crop seeds (LAURA et al, 2009;OHLSON et al, 2011).…”

Section: Continuationmentioning

confidence: 99%

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Vigor tests in assessing the quality of signal grass seeds

Melo

Jeromini

Affonso

et al. 2017

SCA

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The correct assessment of the physiological quality of seed lots is necessary for the quality control program of companies. For such purpose, tests that detect differences in the physiological potential of seed lots and that meet the minimum market requirements. Thus, the study was conducted towards assessing the efficiency of laboratory tests in differentiating the quality of Brachiaria brizantha cv. Xaraés seed lots. Seeds from nine lots were assessed regarding water content, germination, first germination count, electrical conductivity and seedling emergence in sand in the laboratory (normal seedlings, first count and germination rate index), and the results were compared with those from the seedling emergence test conducted in the field. The experimental design used was completely randomized, with four replicates, and the Pearson correlation coefficient between the values from the germination, vigor and field seedling emergence tests was determined. The germination and seedling emergence in sand tests and the seedling emergence rate index efficiently assess the physiological quality of Brachiaria brizantha cv. Xaraés seed lots, providing data similar to those from seedling emergence in the field. Key words: Brachiaria brizantha. Germination. Forrage grass. Vigor tests. ResumoA avaliação correta da qualidade fisiológica dos lotes de sementes é necessária para o programa de controle de qualidade das empresas, para isso se utiliza testes que detectam diferenças no potencial fisiológico de lotes e que atendam às exigências mínimas para a comercialização. Assim, o trabalho foi conduzido com o objetivo de verificar a eficiência de testes de laboratório na diferenciação da qualidade dos lotes de sementes de Brachiaria brizantha cv. Xaraés. As sementes de nove lotes foram avaliadas quanto ao teor de água, germinação, primeira contagem de germinação, condutividade elétrica, emergência de plântulas em areia no laboratório (plântulas normais, primeira contagem e índice de velocidade de emergência) e os resultados comparados aos obtidos no teste de emergência de plântulas em campo. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repetições e determinado o coeficiente de correlação de Pearson entre os valores obtidos nos testes de germinação e de vigor e o teste de emergência em campo. O teste de germinação, emergência de plântulas em areia e índice de velocidade de emergência de plântulas em areia são eficientes na avaliação da qualidade fisiológica de lotes de sementes de Brachiaria brizantha cv. Xaraés, fornecendo informações equivalentes à emergência de plântulas em campo. Palavras-chave: Brachiaria brizantha. Germinação. Gramíneas forrageiras. Testes de vigor.

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Section: Continuationsupporting

confidence: 91%

Section: Continuationmentioning

confidence: 99%

Vigor tests in assessing the quality of signal grass seeds

Melo

Jeromini

Affonso

et al. 2017

SCA

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“…Some studies on the quality of forage seeds have verified differences in the physical quality of lots. Laura et al (2009), in a study with U. brizantha, U. humidicola and U. decumbens seeds verified differences in the physical purity of six lots of each species in different locations in the region of Campo Grande -MS. However, in this work, the incidence of weed seeds was not evaluated.…”

Section: Introductionmentioning

confidence: 77%

Production regions and physical quality of Urochloa decumbens CV. Basilisk seeds

Silva¹,

Martins²,

Cruz³

et al. 2019

Biosci. J.

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Brazil is the largest world producer, consumer and exporter of forage grass seeds. Urochloa decumbens Stapf. species is the second in importance in the Brazilian market of seeds of tropical forage grasses. Seeds are harvested by the soil sweeping method and, in addition to other impurities, harvested lots can present weed seeds, which makes seeds unfeasible for commercialization. The aim of the present study was to evaluate differences in the physical quality and viability of Urochloa decumbens cv. Basilisk seeds produced in different production fields. Fifteen U. decumbens seed lots from the State of São Paulo (1 lot in the municipality of Cássia dos Coqueiros and 3 lots in the municipality of Santo Antônio da Alegria), Minas Gerais (2 lots in the municipality of Tupaciguara, 2 lots in the municipality of Unaí, 2 lots in the municipality of Chapada Gaúcha and 3 lots in the municipality of Monte Santo de Minas), Goiás (1 lot in the municipality of Jataí) and Mato Grosso (1 lot in the municipality of Primavera do Leste) were evaluated by means of the following parameters: water content, viability by tetrazolium test, purity, determination of other seeds by number and weight of one thousand seeds. A completely randomized design was used, and when significant, the means of treatments were compared by the Scott Knott test at 5% probability. The fields of the different regions produce U. decumbens seeds with high variability in physical quality. U. decumbens seeds with the highest physical quality and viability were produced in Cassia dos Coqueiros-SP.

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“…High germination and rapid seedling development are prerequisites for successful pasture or sward establishment (SOUZA SOBRIHNO et. al., 2008;LAURA et. al., 2009;KOJOROSKI-SILVA et.…”

Section: Resultsmentioning

confidence: 99%

Seed germination and seedling vigour of italian ryegrass, cocksfoot and timothy following harvest and storage

Stanisavljević¹,

Djokic²,

Milenković³

et al. 2011

Ciênc. agrotec.

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During post-harvest maturation, different species vary in the length of dormancy breaking or germination increases. Seed dormancy and slow seedling development often limit establishment of forage grass stands. Seed germination and seedling vigour of Italian ryegrass (Lolium italicum A. Braun, Synonym Lolium multiflorum L.), cocksfoot (Dactylis glomerata L.) and timothy (Phleum pretense L.) were observed after harvest and storage. After harvest in June, seeds were stored under standard storage conditions and sampled every 30 days after harvest (DAH), up to 270 DAH, and then every 60 days up to 990 DAH. At each date, seeds were tested for final germination percentage and for seedling vigour traits. Timothy seeds had a maximum germination (88%) and the best seedlings vigour at 90 DAH, which implies that early autumn (September-October) is the best sowing period for freshly harvested seeds of timothy. Timothy seed germination was poor from 270 DAH (73%). The best germination and vigour of Italian ryegrass and cocksfoot seedlings were between 270 and 330 DAH, which equates to spring sowing time (March-April) in the succeeding year. Cocksfoot and Italian ryegrass seeds maintained satisfactory germination levels up to 630 DAH (81%) and 810 DAH (81%), respectively. The data can serve for the determination of a proper storage duration management between harvest and sowing of the tested species under ambient conditions of south-eastern Europe.Index terms: Forage grasses, post-harvest maturation, seed dormancy. RESUMODurante o armazenamento, diferentes espécies comportam-se diferentemente quanto à dormência e crescimento de plântulas. A dormência o desenvolvimento lento das plântulas limitam a época do plantio das gramíneas forrageiras plurianuais. A germinação de sementes e o crescimento das plântulas de azevem italiano (Lolium italicum A. Braun sin. Lolium multiflorum L.), Dactilis (Dactilis glomerata L.) e de timoteo (Phleum pratense L.) foi pesquisada durante a maturação pós-colheita e a silagem. Após a colheita, em junho, sementes foram armazenadas em condições tradicionais e analisadas a cada 30 dias após a colheita, até 270 dias e, em seguida, a cada 60 dias até 990 dias. Nessa pesquisa, avaliou-se a germinação final e o vigor das plântulas. As sementes de timoteo obtiveram germinação máxima (88%) e o melhor crescimento das plântulas após 90 dias de armazenamento, indicando que o melhor período para o plantio das sementes colhidas em junho é o inicio de outono (setembro-outubro). A germinação de sementes de timoteo reduziu nos 270 dias (73%) seguintes. A melhor germinação, e crescimento da plântula do azevem italiano e do dactilis ocorreu entre 270 e 330 dias, indicando que a melhor época para plantio é na primavera (março-abril), do ano seguinte. As sementes de dactilis e azevem italiano mantiveram germinação satisfatória até 630 dias (81%) e 810 dias (81%), respectivamente. Essa pesquisa pode servir para determinação de gerenciamento adequado de duração de armazenamento entre a colheita e o plantio das esp...

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Qualidade física e fisiológica de sementes de braquiárias comercializadas em Campo Grande-MS

Cited by 14 publications

References 5 publications

Vigor tests in assessing the quality of signal grass seeds

Vigor tests in assessing the quality of signal grass seeds

Production regions and physical quality of Urochloa decumbens CV. Basilisk seeds

Seed germination and seedling vigour of italian ryegrass, cocksfoot and timothy following harvest and storage

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