scholarly journals Relationship between nitrogen sources, germination and vigor of soybean seeds

1994 ◽  
Vol 51 (2) ◽  
pp. 305-314
Author(s):  
J. Marcos-Filho ◽  
C.C. Custodio ◽  
G.M.S. Camara ◽  
E.A. Marcos ◽  
R.E. Miranda
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Nitrogen Sources ◽  
Plant Performance ◽  
Growth Stages ◽  
Soybean Seeds ◽  
Mineral Fertilization ◽  
Inoculant Carrier ◽  
Different Growth Stages

This research was conducted in two experimental areas; the first had been under cultivation with Bradyrhizobium japonicum anually inoculated for several years and the second was cultivated with sugarcane for many years receiving only mineral fertilization. Mineral nitrogen (urea and ammonium) effect was compared with the effects of inoculant treatments (liquid and peat carriers) on plant development, yield and seed quality. After harvesting, seeds were stored under normal environmental conditions and tested periodically. Germination, accelerated aging, electrical conductivity and seedling emergence tests showed that seeds coming from the area where inoculation was practiced have better quality. Best plant performance regarding plant height at different growth stages and yield was also found in this area. Among the nitrogen sources studied, best results were obtained when peat was the inoculant carrier.

scholarly journals Physiological quality of dynamically cooled and stored soybean seeds

2013 ◽  
Vol 35 (3) ◽  
pp. 353-360 ◽  
Author(s):  
Jacson Zuchi ◽  
José de Barros França-Neto ◽  
Carlos Sigueyuki Sediyama ◽  
Adílio Flauzino de Lacerda Filho ◽  
Múcio Silva Reis
Keyword(s):  
Dynamic Process ◽  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Superior Performance ◽  
Soybean Seeds ◽  
Tropical Regions ◽  
Physiological Quality ◽  
Feasible Alternative

Storage is an important step in the production of soybean seeds, mainly in tropical regions, where high temperatures can drastically reduce seed quality. The storage at cooler temperatures may be a feasible alternative to preserve seed quality during storage. The objective of this study was to evaluate the physiological quality of soybean seeds artificially cooled by a dynamic process and stored in an environment, with non controlled temperature and relativity humidity. Two seed lots of cultivars Monsoy 8757, TMG 115 RR and BRS Valiosa RR were used. After processing and during packaging the seeds were cooled to 18 ºC by a dynamic process. Seed samples were collected after 0, 60 and 120 days of storage, using the following parameters germination, accelerated aging, seedling emergence in sand, speed of emergence index, electrical conductivity, tetrazolium and seed health. Although soybean seeds artificially cooled by the dynamic method may have slightly superior performance in maintaining physiological quality during storage in non-refrigerated warehouse, for lots of high physiological quality, these advantages are not observed.

scholarly journals Soybean Industrial Seed Treatment: Effect on Physiological Quality During Storage

2018 ◽  
Vol 10 (8) ◽  
pp. 468
Author(s):  
C. R. Bork ◽  
A. S. Almeida ◽  
C. S. Castellano ◽  
G. Zimmer ◽  
T. D. Avila ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Seed Treatment ◽  
Seed Quality ◽  
Seedling Emergence ◽  
Soybean Seed ◽  
Accelerated Aging ◽  
Soybean Seeds ◽  
Distilled Water ◽  
Physiological Quality ◽  
Spray Volume

The aim of this study was to analyze soybean seed physiological quality after being subjected to various mixtures of pesticides via industrial seed treatment. The experiment was performed at the seed laboratory of the company BioGrow, located at São Paulo-SP, using soybean seeds cultivar NS 6700 IPRO which were subjected to 11 different treatments. Seed treatment was carried out using a treater Momesso, model L5-K, calibrated to apply a spray volume of 0.5 L 100 kg-1 of seeds in which the volume of each treatment was adjusted using distilled water. After treatment, seeds were spread over plastic strays for drying for a period of 24 hours under environmental conditions. Once dry, seeds were packed in paper bags and stored for 0 (control), 45, 90, 135 and 180 days, under uncontrolled conditions of temperature and relative humidity, when seed physiological quality was evaluated using the following tests: germination, accelerated aging, seedling emergence, speed of emergence index and speed of emergence. Soybean industrial seed treatment before storage for up to 180 days is practicable using the mixtures of pesticides tested for storing seeds under environmental conditions. All treatments tested contribute to the maintenance of seed quality throughout storage.

scholarly journals HEALTH AND PHYSIOLOGICAL POTENTIAL OF SOYBEAN SEEDS SUBMITTED TO DIFFERENT STORAGE CONDITIONS

2016 ◽  
Vol 91 (1) ◽  
pp. 40
Author(s):  
Pastora Josefina Querales ◽  
Victor Augusto Forti ◽  
Vanessa Cristina Frare ◽  
Taís Leite Ferreira Pinto ◽  
Annelise Roberta Tremocoldi ◽  
...  
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Harmful Effect ◽  
Accelerated Aging ◽  
Storage Conditions ◽  
Soybean Seeds ◽  
Laboratory Environment ◽  
Physiological Quality ◽  
Chamber Temperature ◽  
Cold Chamber

The objective of this study was to verify the health and physiological potential of soybean seeds submitted to different storage conditions. Three batches of soybean seeds were first evaluated for their health and physiological quality with sanitary, germination, seedling emergence in a greenhouse and accelerated aging tests; moisture content was also determined. The seeds were stored for six months under cold chamber (temperature of 10°C and 85% RH), dry chamber (temperature of 20°C and 50% RH) and laboratory (uncontrolled) conditions. Seed samples were taken every three months and submitted to the tests mentioned previously. The harmful effect of fungi on seed quality before storage was observed. Generally, there was a reduction in fungal occurrence with storage, principally for the conditions of the cold chamber and the uncontrolled laboratory environment, resulting in the increased of germination and seedling emergence. 

scholarly journals Action of defense activator and foliar fungicide on the control of Asiatic rust and on yield and quality of soybean seeds

2013 ◽  
Vol 35 (2) ◽  
pp. 198-206 ◽  
Author(s):  
Bruno Oliveira Carvalho ◽  
João Almir Oliveira ◽  
Everson Reis Carvalho ◽  
Vinícius de Andrade ◽  
Thaís Francielle Ferreira ◽  
...  
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Soybean Seeds ◽  
Phakopsora Pachyrhizi ◽  
Breeding Lines ◽  
Yield And Quality ◽  
Seed Health ◽  
Foliar Fungicide

The objective of this study was to evaluate the influence of fungicide application (PrioriXtra®, azoxystrobin + ciproconazole) and defense activator (Bion®, acibenzolar-S-methyl) on the control of Asiatic rust (Phakopsora pachyrhizi), as well as the effect of the disease on the quality of soybean seeds. The experimental design was a randomized block in factorial 4 X 10 with three replications, with four soybean breeding lines, two disease-tolerant and two susceptible and ten managements of rust control, using the products Bion®, Priori Xtra® and their combination, applied once, twice and three times, and a control. It evaluated the rate of normalized difference vegetation, productivity, mass of 1000 seeds and seed quality by means of the germination, seedling emergence, accelerated aging and seed health tests. The use of the defense activator alone in the maximum of three applications is not effective in controlling rust. The fungicide used in conjunction or not with the defense activator is effective in controlling rust and improving seed quality, when used with three foliar applications. The defoliation caused by rust affects considerably the formation of seeds, as well as productivity and also the percentage of germination and seedling emergence, and is influenced by genotype.

scholarly journals Physiological quality of soybean seeds of cultivars submitted to harvesting delay and its association with seedling emergence in the field

2013 ◽  
Vol 35 (2) ◽  
pp. 147-152 ◽  
Author(s):  
Fábio Oliveira Diniz ◽  
Múcio Silva Reis ◽  
Luiz Antônio dos Santos Dias ◽  
Eduardo Fontes Araújo ◽  
Tuneo Sediyama ◽  
...  
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Soybean Seeds ◽  
Test Results ◽  
Accelerated Aging Test ◽  
Aging Test ◽  
Physiological Quality ◽  
The Relationship

With the aim of studying the relationship between the physiological quality of soybean seeds submitted to three harvest times and seedling emergence in the field, seeds of cultivars UFV-16, Splendor, Vencedora, Confiança, UFV-18, UFV-TN 105, Garantia and Celeste were harvested at stages R8, R8+15 and R8+30 days. The following tests were performed: accelerated aging, electrical conductivity, emergence in sand, emergence speed index and seedling emergence in the field. Germination and vigor were reduced in seeds harvested at 30 days after stage R8 in all the tests, except for the accelerated aging test, which showed a decline in vigor seeds harvested with a delay of 15 days. Seeds of cultivars UFV-16, Confiança and Garantia showed lower physiological quality in most tests, while the seeds of cultivar Celeste had higher physiological quality than the others. There was similarity between the test results of seed quality and seedling emergence in the field.

scholarly journals PHYSIOLOGICAL QUALITY OF SOYBEAN SEEDS DEPENDING ON THE PREHARVEST DESICCATION

2015 ◽  
Vol 33 (3) ◽  
pp. 441-450 ◽  
Author(s):  
T. PEREIRA ◽  
C. M. M. COELHO ◽  
M. SOBIECKI ◽  
C. A. SOUZA
Keyword(s):  
Seed Quality ◽  
Accelerated Aging ◽  
Cold Test ◽  
Active Principle ◽  
Growth Stages ◽  
Soybean Seeds ◽  
Glufosinate Ammonium ◽  
Accelerated Aging Test ◽  
Physiological Quality

ABSTRACTDepending on the cultivar, the use of desiccants in the preharvest can favor maintenance of physiological quality. The objective of the study was to assess the physiological quality of soybean seeds as due to the use of apreharvest desiccant and desiccation time in two harvests (2011/12 and 2012/13). The treatments were five soybean cultivars, two growth stages of application, a control (without desiccant application), and three desiccants (glufosinate-ammonium, carfentrazone-ethyl and paraquat) (2011/12 harvest). In the 2012/13 harvest the carfentrazone-ethyl desiccant was replaced by diquat. The physiological quality of seeds was assessed by the percentage of viability and vigor (cold test, tetrazolium test and accelerated aging test). In 2011/12 harvest, there was an early harvest in six days with the use of glufosinate-ammonium and paraquat desiccants, when desiccation was done in stage R7.1, with maintenance of seed quality; however it was dependent on the cultivar. In the 2012/13 harvest there was no early harvesting due to the presence of rain in the preharvest and the use of desiccation did not affect the physiological quality of the seeds either. Cultivar NA5909 RG was more tolerant to remaining in the cultivation environment and maintained higher viability than 90% and greater vigor of 71% by the cold test compared to cultivar BMX Turbo (2011/12 harvest). It is concluded that desiccation can be a viable alternative to the soybean early harvesting, but it depends on the cultivar, the time of desiccation, the active principle of the desiccant and the absence of rain in preharvest.

scholarly journals Physiological potential of soybean seeds after maturation and submitted to artificial drying

2017 ◽  
Vol 39 (4) ◽  
pp. 374-384
Author(s):  
Cesar Pedro Hartmann Filho ◽  
André Luís Duarte Goneli ◽  
Tathiana Elisa Masetto ◽  
Elton Aparecido Siqueira Martins ◽  
Guilherme Cardoso Oba
Keyword(s):  
Moisture Content ◽  
Dry Matter ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Maturation Stage ◽  
Soybean Seeds ◽  
Germination Test ◽  
Moisture Contents ◽  
Three Samples ◽  
Maturation Stages

Abstract: This study evaluated the physiological potential of soybean seeds harvested during two seasons, on different maturation stages and subjected to different drying temperatures. The seeds were harvested at the maturations stages R7, R7 + 2, R7 + 3, R7 + 5, R7 + 6, R7 + 7, R7 + 10 and R7 + 12 days (55, 50, 45, 40, 35, 30, 25, and 20% of moisture content). For each maturation stage, seeds were divided into three samples: one sample was used to directly evaluate the physiological potential, and the others were dried at 40 °C and 50 °C, until reaching the moisture content of 11.5%. The physiological potential was evaluated through germination test, first germination count of germination, accelerated aging, modified cold, electrical conductivity and seedling emergence. The maximum physiological potential of seeds is achieved at the moisture content of 55%, the point that the dry matter is maximum. The seeds became tolerant to artificial drying approximately at the stage R7 + 7 days (30% of moisture content). Germination and vigor of the soybean seeds reduce as the drying temperature is increased from 40 °C to 50 °C, and this effect is enhanced when the seeds show moisture contents above 30%.

scholarly journals Lignification of the plant and seed quality of RR soybeans sprayed with herbicide glyphosate

Revista CERES ◽  
2013 ◽  
Vol 60 (2) ◽  
pp. 286-292
Author(s):  
Cristiane Fortes Gris ◽  
Edila Vilela de Resende Von Pinho ◽  
Maria Laene de Moreira Carvalho ◽  
Rafael Parreira Diniz ◽  
Thaís de Andrade
Keyword(s):  
Seed Quality ◽  
Lignin Content ◽  
Block Design ◽  
Accelerated Aging ◽  
Soybean Seeds ◽  
Randomized Block Design ◽  
Physiological Quality ◽  
Hand Weeding ◽  
Herbicide Glyphosate

Differences in levels of lignin in the plant between conventional and transgenic cultivars RR has been reported by several authors, however, there are few studies evaluating the influence of spraying of glyphosate on the lignin in the plant and RR soybean seeds. The aim of this study was to evaluate the physiological quality of RR transgenic soybean seeds and the lignin contents of plants sprayed with the herbicide glyphosate. The assays were conducted both in greenhouse and field in the municipality of Lavras, MG, in the agricultural year 2007/08. The experiment was arranged in a splitplot design with four replicates, considering the treatments hand weeding and herbicide glyphosate as plots, and five RR soybean cultivars (BRS 245 RR, BRS 247 RR, Valiosa RR, Silvânia RR and Baliza RR) as splitplots. In the greenhouse, the cultivars tested were BRS 245 RR and Valiosa RR in a randomized block design with four replicates. The sprayings were carried out at stages V3, V7 and early R5 (3L/ha). The 1000 seed weight, mechanical injury, germination and germination velocity index, emergence velocity index, accelerated aging, electrical conductivity and water soaking seed test, lignin content in the seed coat, in the stem and legumes were determined. The spraying of glyphosate herbicide, in greenhouse and field, did not alter the physiological quality of seeds and the lignin contents in the plant.

scholarly journals Fruit maturation stage on the physiological quality of maroon cucumber seeds

2019 ◽  
Vol 49 ◽  
Author(s):  
Cleisson Dener da Silva ◽  
Andréia Márcia Santos de Souza David ◽  
Josiane Cantuária Figueiredo ◽  
Jorge Luiz Rodrigues Barbosa ◽  
Rayane Aguiar Alves
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Dry Mass ◽  
Maturation Stage ◽  
Physiological Maturity ◽  
Physiological Quality ◽  
Photography Analysis ◽  
The Ideal

ABSTRACT To obtain seeds of high physiological quality, it is of paramount importance to define the ideal harvest moment, which oftentimes corresponds to the period when the physiological maturity is reached. This experiment aimed to study the maturation process and determine the best harvest season of maroon cucumber fruits (Liso Gibão cultivar), in order to reach the maximum physiological seed quality. The flowers were labeled during the anthesis and the fruits harvested at 14, 21, 28, 35, 42, 49 and 56 days after the anthesis (DAA). The fruits had their visual aspects registered by photography analysis and, later, the seeds were extracted for physical (water and dry matter contents) and physiological (germination, seedling emergence, emergence speed index, accelerated aging and electrical conductivity) analyses. It was observed that the seeds reach the maximum dry mass (8.08 mg seed-1) between 47 and 49 DAA. However, the seed physiological maturity, characterized by a maximum germination (70 %) and vigor, occurs at 56 DDA. The best season to harvest seeds with a higher physiological quality takes place from 49 to 56 DDA, when the fruits present a yellowish color.

scholarly journals Size Variability in Seed Lot Impact Seed Nutritional Balance, Seedling Vigor, Microbial Composition and Plant Performance of Common Corn Hybrids

Agronomy ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 157
Author(s):  
Saveetha Kandasamy ◽  
Nimalka Weerasuriya ◽  
Daniella Gritsiouk ◽  
Greg Patterson ◽  
Soledad Saldias ◽  
...  
Keyword(s):  
Seed Size ◽  
Seed Quality ◽  
Nutritional Composition ◽  
Plant Performance ◽  
Growth Stages ◽  
Seedling Vigor ◽  
Microbial Composition ◽  
Corn Hybrids ◽  
Plant Vigor ◽  
Microbial Profile

Soils with highly uniform textural, physical, and chemical characteristics still give rise to crop stand variability. Seed quality is one of the factors adding to yield variability and has become a concern for corn growers. Hybrid seed producers claim that their seeds provide a uniformity in crop emergence and productivity, but they do not always provide detailed studies to support this claim. Based on growers’ concerns, we examined fields planted with three different hybrid varieties and found that 25% to 50% of the stand had relatively weak vigor, where seed variety A showed 15% of seedlings with lower vigor, and varieties B and C had 30% of seedlings with low vigor. These apparent differences in plant vigor prompted us to initiate a cursory investigation to identify how seed size influenced seedling vigor and if the seedling’s microbial profile played a role in the early growth stages of three commonly grown corn hybrids in Ontario. Seeds were separated based on size, prior to conducting a growth room study. Different sizes of seeds from the same seed lot showed significant differences in vigor capacity and related biometric components. Significant differences were also found in their nutritional composition and microbial profiles within the different seed sizes and the roots and shoots of seedlings derived from such seeds. The results clearly indicate that seed size greatly impacts the plant growth and its microbiome, resulting in seedlings with different plant vigor, microbiomes, and performance.

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