A Influência De Dessecante Na Qualidade Fisiológica De Sementes De Soja

Santos, Fabiana Lopes dos; Bertacine, F.; Souza, Josival Santos; Simões, Ingridh Medeiros; Bossolani, João William; Sá, M. E. de

doi:10.18011/bioeng2018v12n1p68-76

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…On a commercial scale, soybean seeds are stored and transported from the processing units to rural producers in big, semi-permeable raffia bags. According to Santos et al [13], the storage of seeds in permeable packaging without water content control facilitates the exchange of humidity with the environment. In turn, this causes an increase in the water content owing to the alteration of the hygroscopic balance of the seeds during storage, which deteriorate more and have reduced vigor and batch viability.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of coatings for application in raffia big bags in conditioned storage of soybean cultivars in seed processing units

et al. 2020

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Different regions have different environmental conditions, which may be unfavorable for the preservation of the quality of stored soybean seeds over time. Thus, it is necessary to adopt specific technologies to control the storage environment conditions. Big raffia bags are widely used for the storage of soybean seeds, however these consist of a porous, permeable material that allows the exchange of gases between the packaging and the storage environment. In an effort to find a solution to this problem, in this study we evaluated low cost big bag coating alternatives, in order to minimize the effects of temperature and intergranular humidity on stored seeds. Thus, the aim of this work was to evaluate the quality of soybean cultivars subjected to different temperature and storage duration conditions and stored in raffia bags with or without internal coating. We used a completely randomized, three-factor (10 × 6 × 5) experimental design. We assessed 10 soybean cultivars, six storage environments, and five evaluation periods. Our results showed that seeds of the M-SOY 8866, M7110 IPRO, CD 2737 RR, and BMX DESAFIO 8473 RSF soybean cultivars preserved their physiological quality better in different storage environments. The storage duration had a cumulative effect on the negative factors that favor the deterioration of the quality of the stored seeds. The storage temperature was the main factor that affected the physiological quality of the stored seeds. The use of coated packaging was beneficial in preserving the physiological quality of stored soybean seeds; however, its effect was greater at ambient temperature than in a cold environment. The best storage environment for the preservation of the quality of the seeds was characterized by 10°C temperature conditions and the use of coated packaging, while the worst storage environment was characterized by ambient temperature conditions without the use of coated packaging. Thus, it was concluded that the use of coatings in raffia big bags can be an alternative for maintaining the quality of seeds of different soybean cultivars during storage in seed processing units.

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Section: Introductionmentioning

confidence: 99%

Evaluation of coatings for application in raffia big bags in conditioned storage of soybean cultivars in seed processing units

et al. 2020

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Does Chemical Desiccation and Harvest Time Affect the Physiological and Sanitary Quality of Soybean Seeds?

et al. 2019

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The use of desiccants may result in seeds with high physiological and sanitary quality due to the shorter period of exposure to field adverse conditions before the maturity stage for harvest. This study evaluated the effect of chemical desiccants and harvest times on the physiological and sanitary quality of soybean seeds. The experiment consisted of a randomized block design, arranged in a factorial scheme (4 × 3) + 1, with four replications. The first factor corresponded to four desiccation (grammoxone-2 L ha -1 , glufosinate -2 L ha -1 , reglone-1.5 L ha -1 , and saflufenacil-40 g ha -1 ) applied at the R 7.1 phenological stage (physiological maturity and 65% moisture with three harvest times (0, 7, and 14 days after the R 8 phenological stage) and additional treatment (control, application of water only, and harvest at the R 8 stage), with four replications. The use of the grammoxone desiccant and seeds harvested at seven days after the R 8 stage resulted in soybean seeds of the highest physiological quality, as observed for the variables germination, moisture damage, mechanical damage, and incidences of Colletotrichum sp., Phomopsis sp., Penicillium sp. Fusarium sp., Cercospora kikuchii, and Alternaria sp. Seeds harvested at the R 8 + 14 stage had the greatest losses in seed quality. The use of ammonium glufosinate and saflufenacil as desiccants is not recommended due to the reduction in the physiological quality of soybean seeds.RESUMO -O uso de dessecantes pode permitir a obtenção de sementes com máxima qualidade fisiológica e sanitária, devido o menor período em que as sementes ficam expostas as condições adversas no campo aguardando o estádio de maturação para colheita. O objetivo neste trabalho foi avaliar o efeito de dessecantes químicos e épocas de colheita sobre a qualidade fisiológica e sanitária em sementes de soja. O ensaio foi realizado em delineamento em blocos casualizados, disposto em esquema fatorial (4 × 3) + 1, sendo quatro herbicidas para a dessecação (gramoxone -2 L ha -1 , glufosinato -2 L ha -1 , reglone -1,5 L ha -1 , saflufenacil 40 g ha -1 ) aplicado no estádio fenológico R 7.1 (maturidade fisiológica e 65% de umidade), com três épocas de colheita (0; sete e 14 dias após o estádio fenológico R 8 -maturação plena), mais o controle (ausência de dessecante e colhida em R 8 ), com quatro repetições. O uso do dessecante gramoxone e as sementes colhidas sete dias após R 8 proporciona maior qualidade fisiológica de sementes de soja, conforme observado nas variáveis germinação, danos por umidade, danos mecânicos e a incidência de Colletotrichum sp., Phomopsis sp., Penicilium sp., Fusarium sp., Cercospora kikuchii e Alternaria sp.. A colheita de sementes no estádio R 8 +14 promove as maiores perdas na qualidade das sementes. O uso de glufosinato de amônio e saflufenacil como dessecantes não são recomendados, devido à redução na qualidade fisiológica das sementes de soja.Palavras-chave: Glycine max. Herbicidas. Maturidade fisiológica. Vigor.

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Harvest Times With Chemical Desiccation and the Effects on the Enzymatic Expression and Physiological Quality of Soybean Seeds

et al. 2020

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ABSTRACT This study aimed to evaluate the effect of chemical desiccants and harvest times on the enzymatic expression and physiological quality of soybean seeds. The experiment was carried out in a randomized block design with four replications, in a factorial scheme (4 × 3 + 1) with four desiccants (paraquat - 2 L ha-1, ammonium glufosinate - 2 L ha-1, diquat - 1.5 L ha-1, and saflufenacil - 40 g ha-1). These were applied at the phenological stage R7.1 (beginning of leaf yellowing) and at three harvest times (0, 14, and 28 days after the phenological stage R8). There was also a control treatment (no desiccant, harvested at R8). The physiological quality of soybean seeds and the enzymatic expressions of malate dehydrogenase, alcohol dehydrogenase, esterase, isocitrate lyase, and superoxide dismutase were evaluated in laboratory tests. Seeds harvested at the R8 + 14 stage led to the highest losses in seed quality. However, the 50 mm rainfall also affected seed deterioration. The desiccants diquat and paraquat provided the lowest and the highest damage to the seed physiological quality, respectively. The expression of the enzymes alcohol dehydrogenase, esterase, and isocitrate lyase were efficient and had an adequate correlation with the physiological quality. Malate dehydrogenase and superoxide dismutase had no satisfactory relation with the physiological tests performed with soybean seeds.

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A Influência De Dessecante Na Qualidade Fisiológica De Sementes De Soja

Cited by 4 publications

References 12 publications

Evaluation of coatings for application in raffia big bags in conditioned storage of soybean cultivars in seed processing units

Evaluation of coatings for application in raffia big bags in conditioned storage of soybean cultivars in seed processing units

Does Chemical Desiccation and Harvest Time Affect the Physiological and Sanitary Quality of Soybean Seeds?

Harvest Times With Chemical Desiccation and the Effects on the Enzymatic Expression and Physiological Quality of Soybean Seeds

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