Qualidade de sementes de soja obtidas de diferentes cultivares submetidas à dessecação com diferentes herbicidas e épocas de aplicação

Botelho, F. J. E.; Oliveira, João Almir; Pinho, Édila Vilela de Resende Von; Carvalho, Everson Reis; Figueiredo, Ísis Barreto Dantas; Andrade, Vanessa

doi:10.18227/1982-8470ragro.v10i2.2760

Cited by 14 publications

(13 citation statements)

References 8 publications

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“…Pereira et al (2015a) demonstraram que a aplicação de diferentes dessecantes nos estádios R7.1 e R7.3 proporcionaram maior percentual de germinação quando comparado a testemunha. Em contrapartida, outros trabalhos determinam que o uso de herbicidas para a dessecação das plantas, com a finalidade de produção de sementes, em geral, resultaram em redução do percentual de germinação, sendo essa redução depende da cultivar e do herbicida utilizado (DELGADO et al, 2015;BOTELHO et al, 2016).…”

Section: G: Germination (%); F: Vigor By the Cold Test (%); Ea: Vigorunclassified

Implicações da época de colheita sobre a qualidade fisiológica de sementes de soja

Mathias

Pereira²,

Mantovani³

et al. 2017

AGRO@MBIENTE ON-LINE

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Resumo:A antecipação e o atraso da colheita de sementes de soja têm sido objeto de estudo tanto nas áreas de tecnologia de sementes quanto de melhoramento de plantas; em programas de tecnologia de sementes, a antecipação da colheita possibilita a obtenção de sementes com maior qualidade fisiológica. Assim, objetivou-se com o presente trabalho avaliar o efeito da época de colheita sobre a qualidade fisiológica de sementes de soja. Dois ensaios foram conduzidos, um na safra 2013/14 e outro na 2014/15, em delineamento de blocos casualizados, com quatro repetições. Os tratamentos, em cada ensaio, foram: 1) colheita normal (CN) -sementes colhidas com 14% de umidade, sem aplicação de dessecante; 2) colheita com dessecação (CD) -sementes oriundas da dessecação pré-colheita com paraquat + diuron, colhidas com 14% de umidade; 3) colheita antecipada (CA) -sementes colhidas com 17% de umidade; 4) colheita atrasada (CAT) -sementes colhidas 10 dias após a colheita normal. A qualidade fisiológica das sementes foi avaliada pelo percentual de germinação e vigor (teste de frio, envelhecimento acelerado, teste de tetrazólio, condutividade elétrica e comprimento de plântulas). O atraso de colheita em 10 dias reduziu o percentual de germinação e vigor nas duas safras. A colheita com 17% de umidade proporcionou maior vigor pelos testes de frio (97 e 97%) e envelhecimento acelerado (97 e 93%) nas safras 2013/14 e 2014/15, respectivamente. Dessa forma, a colheita das sementes com 17% de umidade proporcionou maior qualidade fisiológica de sementes de soja, cultivar ND 6211 RR, nas duas safras agrícolas. Palavras-chave:Germinação. Glycine max. Teor de umidade. Vigor. Abstract:The anticipation and delay of soybean seed harvesting has been studied in the areas of seed technology and plant breeding, in seed technology programs, anticipation of the harvest makes it possible to obtain seeds with higher physiological quality. The objective of this study was to evaluate the effect of the harvest season on the physiological quality of soybean seeds. Two trials were conducted, one in the 2013/14 crop and another in the 2014/15, in a randomized block design, with 4 replicates. The treatments in each trial were: 1) normal harvest (CN) -seeds harvested with 14% moisture without desiccant application; 2) desiccation (CD) -seeds from pre-harvest desiccation with paraquat + diuron, harvested at 14% moisture; 3) early harvest (CA) -seeds harvested with 17% moisture; 4) late harvest (CAT) -seeds harvested 10 days after normal harvesting. The physiological quality of the seeds was evaluated by the percentage of germination and vigor (cold test, accelerated aging, tetrazolium test, electrical conductivity and seedling length). The delay of harvest in 10 days reduced the percentage of germination and vigor in the two harvests. Harvesting with 17% moisture provided greater vigor by cold tests (97 and 97%) and accelerated aging (97 and 93%) in the 2013/14 and 2014/15 seasons, respectively. Seed collection with 17% moisture yielded higher physiological qualit...

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Section: G: Germination (%); F: Vigor By the Cold Test (%); Ea: Vigorunclassified

Implicações da época de colheita sobre a qualidade fisiológica de sementes de soja

Mathias

Pereira²,

Mantovani³

et al. 2017

AGRO@MBIENTE ON-LINE

View full text Add to dashboard Cite

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“…In this context, seeds from soybean plants desiccated at more advanced reproductive stages presented higher magnitudes for germination percentage, in relation to the desiccation carried out in the phenological stages R6.0, R7.1 and R7.2, research confirms the results obtained and they define that in these stages there is compromise in the germination of soybean seeds (Kappes et al, 2009;Ferrari et al, 2016). In general, the use of pre-harvest desiccation herbicides focused on seed production practices results in negative effects to the percentage of germinated seeds and attributes that there is variation between the tested genotypes and the desiccant herbicide (Delgado et al, 2015;Botelho et al, 2016). The charac the phenol that the ex (Table 2).…”

Section: Resultsmentioning

confidence: 99%

Pre-harvest Desiccation: Productivity and Physical and Physiological Inferences on Soybean Seeds During Storage

Zanatta¹,

Szareski²,

Carvalho³

et al. 2018

JAS

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The objective of this research is to define which soybean phenological stage is adequate to promote pre-harvest desiccation and to measure the effects of this procedure on the physical and physiological attributes of soybean seeds throughout storage. The experiment was carried out at Fazenda Santa Bárbara da Boa Vista located in the municipality of Cabeceiras, Goiás, Brazil. The experimental design was the randomized blocks arranged in a factorial scheme being five phenological stages of soybean development where desiccant was applied (R5.5, R6.0, R7.1, R7.3 and R8.3) × five post-harvest storage times (0, 40, 80, 120, 160 days), arranged in four replicates. The measured characters were: Productivity, Mass of one thousand seeds, Retention of sieves 5.5 mm, 6.0 mm and 6.5 mm, Germination, Accelerated aging and Field emergence. The application of the Paraquat molecule in soybean plants in the phenological stages R5.5 and R6.0 compromises the physical attributes, mass of a thousand seeds and productivity. The germination and vigor of the soybean seeds are adversely affected due to the early desiccation of the plants, and these effects are potentiated throughout the seed storage.

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“…According to Botelho et al (2016), preharvest desiccation can affect the seed vigor probably because of the effect of herbicides on the integrity of seed cell membranes, affecting the solute release rate, which is indirectly detected by the electrical conductivity test. This decreases the capacity of reorganization of membranes, resulting in a higher loss of solutes to the environment and in seeds with lower uniformity and germination speed and stimulating the development of pathogenic microorganisms (MARCOS FILHO, 2015).…”

Section: Methodsmentioning

confidence: 99%

“…Negative effects were also found for the diquat herbicide, which presented lower results than the control treatment for the variables GE, FGC, EM, and AA (Table 4). In addition, Botelho et al 2016 found that the physiological quality of soybean seeds after six months of storage decreased because of the use of diquat for pre-harvest desiccation. Table 4.…”

Section: Methodsmentioning

confidence: 99%

Chemical Desiccants for Anticipation of Harvest and Physiological Quality of Cowpea Seeds

et al. 2020

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Information about the effect of herbicides on cowpea seed quality is scarce. The objective of this work was to evaluate the effect of using chemical desiccants at pre-harvest on the anticipation of harvest and physiological quality of cowpea seeds of the cultivar BRS-Tumucumaque, before and after storage. Two experiments were conducted: experiment 1 was conducted under a randomized block design, with four replications; the treatments consisted of seven herbicides (carfentrazone-ethyl, saflufenacil, glyphosate, paraquat, flumioxazin, glufosinate-ammonium, and diquat) and a control treatment; anticipation of harvest, and seed water content, germination, and vigor were evaluated. The seeds were stored for six months in controlled environment and not-controlled environment rooms and evaluated for water content, germination, and vigor in Experiment 2, which was conducted in a 7^2+1 factorial arrangement, with four replications; the first factor consisted of the seven herbicides, the second factor was the two storage environments, plus a control treatment. The results showed 3 to 9 days of anticipation of harvest relative to the control. The glufosinate -ammonium herbicide negatively affected seed germination and vigor. The glyphosate herbicide decreased seed germination and vigor after storage. The physiological quality of cowpea seeds at the post -harvest period and after six months of storage was not affected by the carfentrazone-ethyl and flumioxazin herbicides. Paraquat and diquat were the most efficient herbicides for the anticipation of harvest (nine days). Glyphosate and glufosinate -ammonium were the most harmful herbicides to seed physiological quality. The controlled environment room was the most adequate environment for seed conservation.

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Qualidade de sementes de soja obtidas de diferentes cultivares submetidas à dessecação com diferentes herbicidas e épocas de aplicação

Cited by 14 publications

References 8 publications

Implicações da época de colheita sobre a qualidade fisiológica de sementes de soja

Implicações da época de colheita sobre a qualidade fisiológica de sementes de soja

Pre-harvest Desiccation: Productivity and Physical and Physiological Inferences on Soybean Seeds During Storage

Chemical Desiccants for Anticipation of Harvest and Physiological Quality of Cowpea Seeds

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