Anticipation and harvest delay in oil and protein contents of soybean seeds, grow crops Valiosa RR

Abstract: Soybean is one of the leading commodities in Brazilian agribusiness. Its cultivation is widespread in different seed-producing regions of the country, where it generates income and local development. In this context, the soybean seed is a fundamental input, as its quality strongly influences the success of the crop. However, the period after the achievement of physiological maturity is critical for the maintenance of seed quality. For that reason, this study aimed at evaluating the effect of harvest delay on both the initial and final qualities of soybean seeds. The research consisted of four harvest times, in which the initial quality was assessed through tests of first germination count, germination, accelerated aging and tetrazolium. After 120 days of storage, the germination and accelerated aging tests were once again conducted. The experiment complied with a completely randomized block design with eight replications. The rainfall was monitored during the pre-harvest phase. All variables experienced negative impacts due to the delay in harvesting. Also, the seeds suffered more damage as the delay progressed, and the variables germination and seed vigor decreased after the storage period.

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Incidence of pathogens and field emergence of soybean seeds subjected to harvest delay

Journal of Seed Science ◽

10.1590/s2317-15372013000400009 ◽

2013 ◽

Vol 35 (4) ◽

pp. 478-484 ◽

Cited By ~ 5

Author(s):

Fábio Oliveira Diniz ◽

Múcio Silva Reis ◽

Eduardo Fontes Araújo ◽

Luiz Antônio dos Santos Dias ◽

Tuneo Sediyama ◽

...

Keyword(s):

Incidence Rate ◽

Seedling Emergence ◽

Growth Stages ◽

Soybean Seeds ◽

Fusarium Spp ◽

Seed Health ◽

Health Quality ◽

Fungi Infection ◽

Harvest Delay ◽

Health Test

This study aimed at evaluating seed health quality, as well as seedling emergence in the field, of eight soybean cultivars (UFV-16, Splendor, Vencedora, Confiança, UFV-18, UFV-TN 105, Garantia, and Celeste) subjected to different harvest periods. To this, seeds were harvested at the growth stages R8, R8+15 days, and R8+30 days, and then submitted to health test and to the test of seedling emergence in field. Results showed that although seeds harvested at 15 and 30 days after the stage R8 had shown a significant increase of fungi infection, especially by Fusarium spp., Phomopsis spp., and Epicoccum spp., the percent seedling emergence in the field was reduced only to seeds harvested 30 days after the reproductive stage R8. Cultivars have shown differentiated behavior between each other in relation to the percent incidence rate of fungi and seedling emergence in the field; and the seeds least infected by fungi were those allowing the highest percent emergence of seedlings in the field.

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Physiological and enzymatic changes in soybean seeds submitted to harvest delay1

Pesquisa Agropecuária Tropical ◽

10.1590/1983-40632017v4749811 ◽

2017 ◽

Vol 47 (4) ◽

pp. 488-496 ◽

Cited By ~ 2

Author(s):

Alan Mario Zuffo ◽

Joacir Mario Zuffo Júnior ◽

Everson Reis Carvalho ◽

Fábio Steiner ◽

Everton Vinicius Zambiazzi

Keyword(s):

Seed Yield ◽

Seed Weight ◽

Isocitrate Lyase ◽

Block Design ◽

Seedling Emergence ◽

Seed Vigor ◽

Soybean Seeds ◽

Phenological Stage ◽

Enzymatic Changes ◽

Harvest Delay

ABSTRACT Harvest delay may affect the physiological quality of soybean seeds due to the occurrence of unfavorable environmental conditions in the field. This study was conducted to investigate the physiological and enzymatic changes in soybean seeds submitted to harvest delay. A randomized block design, with eight seed harvest periods (0; 5; 10; 15; 20; 25; 30; and 35 days after the R8 phenological stage - full maturity) of the BRS 820 RR® cultivar, with four replicates, was used. At each harvest period, the moisture content, 1,000-seed weight, germination, seedling emergence, emergence speed index, accelerated aging, vigor and viability (tetrazolium test), electrical conductivity, enzymatic expression and seed yield were measured. Harvest delay up to 35 days after the R8 phenological stage do not affect the 1,000-seed weight and seed yield. The delayed harvest from the R8 stage results in increased damage by stink bugs and moisture. The harvest delay of seeds from the 10th day after the R8 stage impairs the seed vigor and, from the 15th day, seed germination. Seeds harvested with a delay after the R8 stage have lower expressions of the following isoenzymatic systems: malate dehydrogenase, alcohol dehydrogenase, esterase, isocitrate lyase and superoxide dismutase, especially after 15 days of harvest delay.

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DESSECAÇÃO QUÍMICA E RETARDAMENTO DE COLHEITA EM SOJA VISANDO À PRODUÇÃO DE SEMENTES

Nativa ◽

10.31413/nativa.v7i1.6613 ◽

2019 ◽

Vol 7 (1) ◽

pp. 13

Author(s):

Adriano Silveira Barbosa ◽

Joênes Mucci Pelúzio ◽

Ildon Rodrigues do Nascimento ◽

Rodrigo Ribeiro Fidelis ◽

Sorane Moraes de Sousa

Keyword(s):

Glycine Max ◽

Block Design ◽

Soybean Seeds ◽

Seed Productivity ◽

Recommended Dosage ◽

Low Latitude ◽

Randomized Complete Block Design ◽

Chemical Determination ◽

And Control ◽

Harvest Delay

Estudos sobre o efeito da dessecação e retardamento de colheita, nas qualidades das sementes de soja, são escassos em cultivos sob baixa latitude. Objetivou-se avaliar o efeito da aplicação de dessecante em soja, avaliando o retardamento da colheita em duas cultivares, observando as respostas fisiológicas, químicas e produtividade das sementes. No ano agrícola 2016/17, foi realizado experimento em Gurupi-TO, em delineamento de blocos casualizados, com três repetições, sendo os tratamentos dispostos em esquema de parcelas subsubdivididas, alocados nas parcelas duas cultivares com tipos de crescimento diferentes (NA 8015 RR-indeterminado; M 8349 IPRO-determinado), nas subparcelas dois sistemas de manejo (com dessecação e testemunha) e nas subsubparcelas quatro épocas de colheita (R8, R8+7, R8+14, R8+21). O dessecante utilizado foi herbicida com princípio ativo paraquat, na dosagem recomendada para a soja (1,5 L ha-1), aplicado no estádio R7.2 da cultura. Após a colheita, as sementes foram submetidas aos testes de germinação em laboratório, emergência em campo, produtividade, teores de óleo e proteína dos grãos. Não houve efeito da dessecação química e do retardamento de colheita na composição química dos grãos. O retardamento da colheita afeta negativamente a germinação, emergência e produtividade das sementes. A cultivar M 8349 IPRO é mais tolerante ao retardamento de colheita.Palavras-chave: épocas de colheita, Glycine max, herbicida dessecante. CHEMICAL DETERMINATION AND DELAY OF HARVESTING IN SOYBEANS FOR SEED PRODUCTION ABSTRACT: Studies on the effect of desiccation and crop delay on the qualities of soybean seeds are scarce in crops under low latitude. The objective of this study was to evaluate the effect of the application of desiccant in soybean, evaluating the delay of the harvest in two cultivars, observing the physiological, chemical and seed productivity responses. In the agricultural year 2016/17, an experiment was carried out in Gurupi-TO, a randomized complete block design, with three replications. The treatments were arranged in a sub-split plots scheme, with two cultivars with different growth types (NA 8015 RR-undetermined; M 8349 IPRO-determined) in the subplots two management systems (with desiccation and control) and in sub-subplots four harvest times (R8, R8+7, R8+14, R8+21). The desiccant used was herbicide with paraquat active ingredient, at the recommended dosage for soybean (1.5 L ha-1), applied at the R7.2 stage of the crop. After the harvest, the seeds were submitted to germination tests in the laboratory, field emergence, yield, oil content and grain protein. There was no effect of chemical desiccation and crop delay on the chemical composition of the grains. Harvest delay negatively affects seed germination, emergence and yield. The cultivar M 8349 IPRO is more tolerant to crop delay.Keywords: harvest time, Glycine max, desiccant herbicide.

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Lignin and Activity Enzymatic in Susceptibility to Weathering Damage on Soybean Seeds

Journal of Agricultural Science ◽

10.5539/jas.v11n11p203 ◽

2019 ◽

Vol 11 (11) ◽

pp. 203

Author(s):

Elisa de Melo Castro ◽

João Almir Oliveira ◽

Heloísa Oliveira dos Santos ◽

Édila Vilela de Resende Von Pinho ◽

Amador Eduardo de Lima ◽

...

Keyword(s):

Alcohol Dehydrogenase ◽

Malate Dehydrogenase ◽

Lignin Content ◽

Block Design ◽

Electrophoretic Pattern ◽

Accelerated Aging ◽

Rainfall Simulation ◽

Soybean Seeds ◽

Physiological Quality ◽

Harvest Delay

The aim of this study was to evaluate the isoenzyme activity in soybean seeds with different lignin contents subjected to harvest delay with artificial incidence of rainfall before and after storage. The experiment was conducted in a randomized block design with three replicates and a 5 × 3 × 2 factorial design, being five soybean cultivars, three harvest seasons (R8, R8 + one pre-harvest rainfall simulation, and R8 + two pre-harvest rainfall simulations), and two storage seasons (0 and 180 days). The pre-harvest rainfall simulations were performed through irrigation at the intensity of 30 mm of water until the pods were soaked and then collected after reached 18% water content. Seeds were evaluated regarding chemical composition (lignin content), physiological quality (germination, accelerated aging), and enzymatic activity (catalase, esterase, alcohol dehydrogenase, malate dehydrogenase, and isocitratelyase). The cultivar AS 7307 RR showed higher lignin content in the integument and higher physiological quality. The harvest delay and the artificial incidence of rainfallpromotesvariation in the electrophoretic pattern of the enzymes catalase, esterase, alcohol dehydrogenase; malate dehydrogenase, and isocitratelyase for stored and non-stored seeds.

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Productivity and quality of soybean seeds with different fertilization on podzolized chernozem

Collected Works of Uman National University of Horticulture ◽

10.31395/2415-8240-2020-97-1-136-144 ◽

2020 ◽

Vol 1 (97) ◽

pp. 136-144

Author(s):

H.M. Hospodarenko ◽

◽

I.V. Prokopchuk ◽

K. P. Leonova ◽

V.P. Boyko

Keyword(s):

Crop Rotation ◽

Crop Yields ◽

Spring Barley ◽

Mineral Fertilizer ◽

Nitrogen Fertilizers ◽

Mineral Fertilizers ◽

Forest Steppe ◽

Soybean Seeds ◽

Different Doses

The productivity of agricultural crops is the most variable and integral indicator of their vital activity, which accumulates their genetic potential, soil fertility, weather conditions and components of agricultural technology. Soybean under optimal growing conditions (the reaction of the soil is close to neutral, sufficient phosphorus and potassium nutrition, the use of nitraginization) assimilates from the air about 70 % of the total nitrogen requirement. Therefore, it is believed that it is enough to apply only a starting dose of nitrogen fertilizers (20–40 kg/ha a. s.), to get a high yield with good indicators of grain quality. The results of studies of the influence of long-term (8 years) application of different doses and ratios of fertilizers in field crop rotation on podzolized chernozem in the conditions of the Right -Bank Forest-Steppe of Ukraine on the yield and quality of soybean seeds preceded by spring barley were presented. It was found that crop yields could be increased by 18–77 % owing to different doses, ratios and types of fertilizers. The highest indicators of seed yields for three years of the research (3,02 t/ha) were obtained under the application of mineral fertilizers at a dose of N110P60K80 per 1 ha of crop rotation area, including under soybean – N60P60K60. Exclusion of the nitrogen component from the complete fertilizer (N60P60K60) reduced its yield by 26 %, phosphorus – by 17, and potassium by 11 %. There was no significant decrease in soybean yield in the variant of the experiment with a decrease in the proportion of potassium in the composition of complete mineral fertilizer (N60P60K30) for three years of study. The largest mass of 1000 soybean seeds was formed at doses of N60К60 fertilizers, and their protein content — under the application of complete mineral fertilizer in doses of N60P60K60 and N60P60K30.

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