Effect of Seed Moisture Content, Field Weathering, and Combine Cylinder Speed on Soybean Seed Quality<sup>1</sup>

Green, D. E.; Cavanah, L. E.; Pinnell, E. L.

doi:10.2135/cropsci1966.0011183x000600010002x

Cited by 31 publications

(24 citation statements)

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“…e Colletotrichum truncatum, que ao infectar as sementes, podem reduzir o vigor e a germinação. Ainda a respeito do assunto, Green et al (1965), Mondragnon e Potts (1974), ) e Vieira et al (1982 mostram o efeito marcante da temperatura como parâmetro determinante da baixa qualidade de sementes de soja. Por sua vez, Tekrony et al (1980) constatou que à temperatura de 22,2ºC, na ausência total de chuvas, o primeiro declínio no vigor ocorreu após a maturação de campo; já a 12,2ºC a perda de vigor foi significativa apenas depois de 39 dias.…”

Section: Resultsunclassified

Perfil dos aspectos físicos, fisiológicos e químicos de sementes de soja produzidas em seis regiões do Brasil

Costa

Mesquita

Maurina

et al. 2005

Rev. bras. sementes

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Termos para indexação: Glycine max, viabilidade, vigor, dano mecânico. PROFILE OF THE PHYSICAL, PHYSIOLOGICAL AND CHEMICAL ASPECTS OF SOYBEAN SEEDS PRODUCED IN SIX REGIONS OF BRAZILABSTRACT -Soybean seeds, produced in some areas of Brazil, have presented serious problems of physiological quality. This has been attributed to inadequate fittings of the harvesting system, climatic stress occurrence at maturation and stinkbug lesions, resulting in seed with low germination and vigor. The objective of this study was to evaluate the quality of soybean seeds produced in different areas and to identify the best edaphoclimatic regions for high quality seed production. During the 2001/2002 soybean crop, 364 samples, including different cultivars, were collected directly from the grain reservoir of the combine during harvesting in the States of Parana, Minas Gerais, Mato Grosso do Sul and Mato Grosso. The seeds were evaluated based on the following parameters: tetrazolium test (to estimate vigor, viability, field deterioration, mechanical damage and bug attack); germination (%), vigour (TZ 1-3), viability (TZ 1-5), oil, protein and acidity content. The results showed that the high levels of breakage, mechanical damage and tegument rupture which were associated with damage caused by moisture and sting bug, affected the quality of seeds produced in Minas Gerais, Mato Grosso do Sul, North and the Western regions of Parana,

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Section: Resultsunclassified

Perfil dos aspectos físicos, fisiológicos e químicos de sementes de soja produzidas em seis regiões do Brasil

Costa

Mesquita

Maurina

et al. 2005

Rev. bras. sementes

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“…Field weathering reduces seed germination and increases susceptibility to seed coat damage (Green, Pinnell & Cavanah, 1966) and seed infection (Paschal & Ellis, 1978).…”

Section: Introductionmentioning

confidence: 99%

Germination of South African soya bean seed lots

Hamman

Koning

Venter

1996

South African Journal of Plant and Soil

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A survey of the germination performance of some South African soya bean [Glycine max (L.) Merrill.] cultivars, produced at different localities, was conducted. Seeds were harvested from two early-maturing (Columbus and Crawford), two intermediate-maturing (Prima and Highveld Top), and two late-maturing cultivars (Ibis and Impala), from seven sites. The standard germination test was performed on all 42 seed lots. Germination performance was not linked to any particular maturity type or cultivar, but locality had a distinct effect. Germination of seeds of some seed lots harvested at Groblersdal and Potchefstroom was reduced, primarily due to the effect of seed-borne pathogens, which resulted in relatively large numbers of dead seeds. At Piet Retief, poor germination performance was inversely related to the large number of abnormal seedlings in the standard germination test, which was due to damaged seed coats. There were highly significant correlations between the number of dead seeds and the incidence of fungal infection, and between the number of abnormal seedlings and seedcoat damage. The predominant seed-borne pathogen was identified as Fusarium equiseti, a fungus not previously reported as being present in South African soya bean seed.Saadontkieming van verskeie Suid-Afrikaanse sojaboon [Glycine max(L.) Merrill.]-kultivars, wat in verskillende lokaliteite geproduseer is, is ondersoek. Saad van twee kortseisoen-kultivars (Columbus en Crawford), twee langseisoen-kultivars (Ibis en Impala) en twee intermediere tipes (Prima en Highveld Top) is op sewe lokaliteite geoes. Die standaardontkiemingstoets is op al42 saadlotte uitgevoer. Ontkiemingsprestasie het nie met groeiperiodetipe of kultivar verband gehou nie, maar daar was 'n duidelike invloed van lokaliteit. Ontkieming van sommige van die saadlotte wat op Groblersdal en Potchefstroom geoes is, is verlaag, hoofsaaklik as gevolg van die invloed van saadgedraagde patogene wat tot relatiewe hoe getalle dooie sade gelei het. Swak prestasie van saad afkomstig van Piet Retief was te wyte aan 'n hoe persentasie abnormale saailinge in die ontkiemingstoets wat die gevolg van beskadigde saadhuide was. Hoogs betekenisvolle korrelasies is gevind tussen die aantal dooie sade en die voorkoms van swaminfeksie, asook tussen die aantal abnormale saailinge en saadhuidskade. Die algemeenste saadgedraagde patogeen was Fusarium equiseti. Hierdie fungus is nog nie voorheen as 'n patogeen van Suid-Afrikaanse sojaboonsaad gerapporteer nie.

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“…Por sua vez, Dajoz (1981) comenta que o clima é condicionado pela pressão atmosférica e geralmente em altitude elevada o ar é mais rarefeito e o vapor d'água é menos abundante, propiciando à obtenção de sementes de melhor qualidade. Todavia, Costa et al (1994), Vieira et al (1982), Green et al (1966), Mondragon et al (1974), Pereira et al (1979) indicam claramente a influência marcante da temperatura como parâmetro determinante da qualidade da semente produzida. Contudo, Koostra & Harrington (1969) Médias seguidas pela mesma letra, na coluna, não diferem entre si, pelo teste de Duncan a 5% de probabilidade.…”

Section: Resultsunclassified

Validação do zoneamento ecológico do estado do Paraná para produção de sementes de soja

Costa

Mesquita

Neto

et al. 2005

Rev. bras. sementes

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RESUMO -Em determinadas regiões do Estado do Paraná, o baixo potencial de germinação, atribuído às condições climáticas desfavoráveis, durante o período de maturação da soja, é o principal fator de eliminação de lotes de sementes. Objetivando avaliar a dimensão do problema o estudo visou determinar as regiões mais aptas do Paraná para produção de sementes de soja de elevado padrão fisiológico. Para tal, foram coletadas 121 amostras de sementes da cultivar BR 16 (1996cultivar BR 16 ( /97, 1997cultivar BR 16 ( /98 e 1998cultivar BR 16 ( /1999) e 119 amostras da cultivar BRS 133 (1999/2000, 2000/2001 e 2001/ 2002). Os parâmetros tomados por base para analisar a qualidade das sementes foram: germinação (%), vigor (TZ 1-3), viabilidade (TZ 1-5), deterioração por umidade (TZ 6-8), dano mecânico (6-8) e lesões de percevejos (TZ 6-8). Para interpretação dos dados, o estado do Paraná foi dividido em três regiões ecológicas: T1, temperatura média do mês mais quente (Fevereiro) >24ºC; T2, temperatura média entre 22 e 24ºC; T3, temperatura média<22ºC. A região T3 que abrange os municípios de Ponta Grossa, Guarapuava, Pato Branco, Marilândia do Sul, Francisco Beltrão e parte de Cascavel, destacou-se, invariavelmente, por apresentar reduzidos índices de sementes com deterioração por umidade, com dano mecânico e com lesões de percevejos, resultando num melhor potencial de germinação, de vigor e de viabilidade. A validação do zoneamento acológico adiciona uma tecnologia capaz de identificar a região Sul do estado do Paraná, com melhores condições climátcas para produção de sementes de soja de qualidade.Termos para indexação: Glycine max, vigor, germinação, dano mecânico, viabilidade. VALIDATION ECOLOGICAL ZONING OF THE STATE OF PARANA FOR SEED PRODUCTION CULTIVARS OF SOYBEANABSCTRACT-This study was carried out to determine the ecological regions most suitable for soybean seed production in the State of Parana, Brazil. At harvest, 121 seed samples of the cultivars BR 16 and 119 samples of BRS 133 were collected from different regions in the state, from 1997 to 2002. Growing season seed quality evaluations were: standard germination and the tetrazolium test for field deterioration, mechanical damage and stink bug attack. Three regions were previously defined based upon mean temperature (MT) in February;:T1 region, with AT>24ºC; T2, with AT between 22 and 24ºC; and T3, with AT< 22ºC. The region T3 produced the best quality seeds followed by regions T2 and T1. Mechanical damage during harvest significantly reduced seed quality, especially in regions T1 and T2. In general, region T3 was the most favorable area for production with high quality seed. Other factors, such as mechanical damage and stink bugs, were responsible for lowering seed quality of two soybean cultivars produced in the State of Parana. Based on the climatic chart of the State of Parana and the results obtained in this trial we can infer that the validation of ecological zoning is a solid alternative for seed producers in the State of Parana to search for suita...

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Effect of Seed Moisture Content, Field Weathering, and Combine Cylinder Speed on Soybean Seed Quality¹

Cited by 31 publications

References 0 publications

Perfil dos aspectos físicos, fisiológicos e químicos de sementes de soja produzidas em seis regiões do Brasil

Perfil dos aspectos físicos, fisiológicos e químicos de sementes de soja produzidas em seis regiões do Brasil

Germination of South African soya bean seed lots

Validação do zoneamento ecológico do estado do Paraná para produção de sementes de soja

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Effect of Seed Moisture Content, Field Weathering, and Combine Cylinder Speed on Soybean Seed Quality1

Cited by 31 publications

References 0 publications

Perfil dos aspectos físicos, fisiológicos e químicos de sementes de soja produzidas em seis regiões do Brasil

Perfil dos aspectos físicos, fisiológicos e químicos de sementes de soja produzidas em seis regiões do Brasil

Germination of South African soya bean seed lots

Validação do zoneamento ecológico do estado do Paraná para produção de sementes de soja

Contact Info

Product

Resources

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Effect of Seed Moisture Content, Field Weathering, and Combine Cylinder Speed on Soybean Seed Quality¹