Acúmulo e translocação de cobre e zinco em plantas de Crambe abyssinica

Crambe (Crambe abyssinica) é uma cultura promissora para a produção de biodiesel. No entanto, não há muita informação disponível sobre as técnicas e pesquisas sobre o melhor desempenho em diferentes regiões para explorar o seu potencial. Objetivou-se avaliar o efeito de cobre e zinco no acúmulo e distribuição destes elementos nesta planta. O estudo foi realizado em casa de vegetação e constou de dois experimentos independentes, em delineamento experimental inteiramente casualizado, com três repetições. Em um deles, os tratamentos consistiram em cinco doses de cobre, ou seja, 0, 10, 15, 20 e 25 mg kg-1 e no outro , cinco doses de zinco, 0, 20, 30, 40 e 50 mg kg-1. Após 100 dias de germinação as plantas foram colhidas e avaliadas os níveis de cobre e zinco em tecidos de plantas. Os dados foram submetidos à análise de variância e comparação de médias pelo teste de Tukey a 1 e 5% de significância. Os teores de cobre e zinco aumentaram significativamente na fitomassa do crambe em função da aplicação destes elementos no solo. Os acúmulos de cobre e zinco nas plantas de crambe obedeceram às seguintes ordens, respectivamente: raiz > parte aérea; parte aérea > raiz. O índice de translocação do zinco foi maior que a do cobre nas plantas de crambe.Content and translocation of copper and zinc in plant Crambe abyssinicaAbstract: Crambe is a promising crop for biodiesel production. However, there is no much information available about techniques and research regarding the best performance in different regions to explore its potential. The objective of this study was to evaluate the effect of copper and zinc in the accumulation and distribution of these elements in this plant. The study was carried out in a greenhouse and it consisted of two independent experiments in completely randomized design, with three replications. Two metals with five levels were applied: 0, 10, 15, 20 and 25 mg∙kg−1 for copper and 0, 20, 30, 40 and 50 mg∙kg−1 for zinc. After 100 days of germination the plants were harvested and assessed the levels of copper and zinc in plant tissues. Data were subjected to analysis of variance and comparison of means by Tukey test at 1 and 5% significance. Copper and zinc content increased significantly in the biomass of crambe due to the application of these elements in the soil. Copper and zinc accumulation in crambe plants followed the following orders, respectively: root> shoot; shoot> root. The zinc translocation ratio was higher than that of copper in crambe plants.

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Physical characteristics of passionfruit cv. BRS gigante amarelo produced by flowers with three and four carpels

Bioscience Journal ◽

10.14393/bj-v36n5a2020-41776 ◽

2020 ◽

Vol 36 (5) ◽

Author(s):

Danilo Akio de Sousa Esashika ◽

Fábio Gelape Faleiro ◽

Nilton Tadeu Vilela Junqueira

Keyword(s):

Spherical Shape ◽

Physical Characteristics ◽

Transverse Diameter ◽

Reproductive Structure ◽

Tukey Test ◽

Randomized Design ◽

Completely Randomized Design ◽

Pericarp Thickness ◽

Fruit Mass ◽

Longitudinal Diameter

The carpel is the female reproductive structure composed of a set of stigma, style and ovary. Normally passionflower have three carpels, however, some cultivars have this structure in greater quantity. The objective of this work was to identify relationships between the number of carpels and the physical characteristics of BRS Gigante Amarelo fruits. The flowers with three and four carpels were marked, pollinated and the fruits harvested from these flowers analyzed for transverse diameter, longitudinal diameter, pericarp thickness, fruit mass, pulp mass, pulp ratio, number and weight of seeds. A completely randomized design with 10 replicates per treatment was used and each plot had the average of 3 fruits. The data were submitted to variance analysis and the means were compared by the Tukey test at 5% of probability. The fruits generated by flowers with 4 carpels were 18,30% heavier, their pulp were on average 20.75% heavier, presented transverse diameter 7,53% superior to that of fruits generated by flowers with 3 carpels. Similar increments were identified regarding the number of seeds and the weight of seeds per fruit that increased 18,85% and 52.42%, respectively. This result indicates that cv. BRS Yellow Giant with 4 carpels generates heavier fruits, pulp and seeds with a more spherical shape.

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Performance of cycle diesel engine using Biodiesel of olive oil (B100)

Ciência e Agrotecnologia ◽

10.1590/s1413-70542012000300011 ◽

2012 ◽

Vol 36 (3) ◽

pp. 348-353 ◽

Cited By ~ 3

Author(s):

Carlos Eduardo Silva Volpato ◽

Alexon do Prado Conde ◽

Jackson Antonio Barbosa ◽

Nilson Salvador

Keyword(s):

Diesel Engine ◽

Vegetable Oils ◽

Diesel Oil ◽

Efficiency Analysis ◽

Chemical Processes ◽

Renewable Fuel ◽

Tukey Test ◽

Randomized Design ◽

Diesel Cycle ◽

Completely Randomized Design

Biodiesel is a renewable fuel derived from vegetable oils used in diesel engines, in any proportion with petroleum diesel, or pure. It is produced by chemical processes, usually by transesterification, in which the glycerin is removed. The objective of this study was to compare the performance of a four stroke, four cylinder diesel cycle engines using either olive (B100) biodiesel oil or diesel oil. The following parameters were analyzed: effective and reduced power, torque, specific and hourly fuel consumption, thermo-mechanical and volumetric efficiency. Analysis of variance was performed on a completely randomized design with treatments in factorial and the Tukey test applied at the level of 5%. Five rotation speeds were researched in four replications (650, 570, 490, 410, 320 and 240 rpm). The engine fed with biodiesel presented more satisfactory results for torque, reduced power and specific and hourly consumptions than that fed with fossil diesel.

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Utilização de diferentes substratos na propagação de Pyrostegia venusta através de estacas

Revista Verde de Agroecologia e Desenvolvimento Sustentável ◽

10.18378/rvads.v10i4.3375 ◽

2015 ◽

Vol 10 (4) ◽

pp. 38

Author(s):

J. G. Crispim ◽

M. M. Rêgo ◽

E. R. Rêgo ◽

Â. M. S. Pessoa ◽

P. A. Barroso

Keyword(s):

Analysis Of Variance ◽

Leaf Length ◽

Cattle Manure ◽

Main Root ◽

Plastic Tube ◽

Tukey Test ◽

Randomized Design ◽

Number Of Leaves ◽

Completely Randomized Design ◽

Pyrostegia Venusta

Este trabalho teve por objetivo avaliar o desenvolvimento de clones de Pyrostegia venusta em diferentes tipos de substratos. O experimento foi conduzido em delineamento inteiramente casualizado, com 06 tratamentos e 10 repetições, cada repetição foi constituída por um tubete de polietileno com capacidade de 103cm3. Os tratamentos testados foram: (T1) 100% de areia lavada; (T2) 50% areia lavada + 50% substrato comercial Plantmax®; (T3) 100% de substrato comercial Plantmax®; (T4) 50% areia lavada + 50% de esterco bovino; (T5) 1/3 areia lavada + 1/3 esterco bovino +1/3 de Plantmax® e (T6) 50% esterco bovino + 50% de Areia lavada. Após 30 dias foram avaliados o número de estacas sobreviventes, comprimento do broto (cm), número de folhas, comprimento da folha (cm), número de raízes e comprimento da raiz principal (cm). Os dados foram submetidos a análise de variância e as médias comparadas pelo teste de Tukey a 5% de probabilidade. Por meio da análise de variância (p<0,01), detectou-se significância estatística, para as variáveis, sobrevivência das estacas e número de brotos por estaca de P. venusta, quando cultivadas em substrato composto por 50% areia lavada + 50% substrato comercial Plantmax®. Essa mistura apresenta a vantagem de ser mais econômica quando comparado ao substrato comercial Plantmax®, sendo portanto, recomendada na produção de mudas de cipó-de-São João.Utilization of different substrates in the propagation of Pyrostegia venusta by cuttingsAbstract: The experiment was carried out in a completely randomized design with 06 treatments and 10 replicates, each replicate consisted of polyethylene plastic tube the size of 103cm3. The treatments were: (T1) 100% washed sand; (T2) 50% washed sand + 50% commercial substrate Plantmax®; (T3) 100% substrate commercial Plantmax®; (T4) 50 % washed sand + 50% cattle manure; (T5) 1/3 washed sand + 1/3 manure +1/3 Plantmax® and Plantmax (T6) 50 % cattle manure + 50% washed sand. After 30 days, were evaluated number of cutting survival, bud length in cm, number of leaves, leaf length in cm, number of roots and length of the main root. Data were submitted to analysis of variance and means were compared by Tukey test at 5% probability. By analysis of variance (p< 0.01), there was significant differences for the variables, czutting survival and number of shoots per cutting when cultured on substrate composed of 50% washed sand + 50% commercial substrate Plantmax®. Furthermore, this mixture has the advantage to be cheaper as compared to substrate Plantmax®, so we recommend the seedlings of Saint John’s vine.

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AGRONOMIC EVALUATION OF BANANA PLANTS IN THREE PRODUCTION CYCLES IN SOUTHWESTERN STATE OF BAHIA

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452017990 ◽

2017 ◽

Vol 39 (1) ◽

Cited By ~ 3

Author(s):

ALESSANDRO DE MAGALHÃES ARANTES ◽

SÉRGIO LUIZ RODRIGUES DONATO ◽

TÂNIA SANTOS SILVA ◽

VAGNER ALVES RODRIGUES FILHO ◽

EDSON PERITO AMORIM

Keyword(s):

Agronomic Traits ◽

Area Index ◽

Tukey Test ◽

Federal Institute ◽

Randomized Design ◽

Agronomic Evaluation ◽

Production Cycles ◽

Number Of Leaves ◽

Southwestern State ◽

Completely Randomized Design

ABSTRACT This assay was conducted in the experimental area of the Federal Institute of Bahia, Campus Guanambi, BA, and aimed to evaluate agronomic traits of Prata, Cavendish, Gros Michel and Maçã banana cultivars three production cycles. The 72 treatments, 24 cultivars and three production cycles were arranged in a split plot scheme in time, in a completely randomized design with five replications and four plants per plot. Plots were arranged in 24 cultivars, Prata-Anã, Maravilha, FHIA-18, FHIA-18 BRS, BRS Platina, JV42-135, Pacovan, Japira, PV79-34, Pacovan-Ken, Preciosa, Guarantida, Maçã, Caipira, BRS Tropical, BRS Princesa, YB42-03, YB42-07, YB42-47, Grande-Naine, Calypso, Buccaneiro, FHIA-23 and FHIA-17; and subplots consisted of three production cycles. Data obtained were submitted to analysis of variance. The average of the cultivars were grouped by Scott-Knott criterion (p<0.05) and production cycles compared by Tukey test (p<0.05). ‘JV42-235’, ‘Japira’ and ‘Pacovan-Ken’ cultivars had larger size and ‘Grande Naine’ had smaller size. ‘Prata-Anã’ cultivar had higher number of leaves at harvest, with leaf area index similar to the others. ‘BRS Platina’ cultivar is earlier at flowering and harvest. ‘Maravilha’, ‘BRS Platina’, ‘FHIA-23’, ‘BRS Tropical and BRS Princesa’ cultivars presented greater potential for use by farmers.

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CARACTERÍSTICAS FÍSICAS DE CÁPSULAS POROSAS PARA USO NA IRRIGAÇÃO LOCALIZADA

Irriga ◽

10.15809/irriga.2019v24n4p861-873 ◽

2019 ◽

Vol 24 (4) ◽

pp. 861-873

Author(s):

Pedro Idelano de Alencar Felício ◽

Renato Silvio da Frota Ribeiro ◽

Alexsandro Oliveira Silva ◽

José Carlos de Araújo ◽

Raimundo Nonato Távora Costa

Keyword(s):

Irrigation System ◽

Soil Management ◽

Hydraulic Conductance ◽

Physical Characteristics ◽

Small Areas ◽

Tukey Test ◽

Randomized Design ◽

Completely Randomized Design ◽

E Mail ◽

Climate Management

CARACTERÍSTICAS FÍSICAS DE CÁPSULAS POROSAS PARA USO NA IRRIGAÇÃO LOCALIZADA PEDRO IDELANO DE ALENCAR FELÍCIO1; RENATO SÍLVIO DA FROTA RIBEIRO1; ALEXSANDRO OLIVEIRA DA SILVA1; JOSÉ CARLOS DE ARAÚJO1 E RAIMUNDO NONATO TÁVORA COSTA1 1 Departamento de Engenharia Agrícola, Universidade Federal do Ceará, Av. Mr. Hull, s/n, Pici, CEP:60356-001, Fortaleza, Ceará, Brasil. E-mail: [email protected]; [email protected]; [email protected]; [email protected]; [email protected] 1 RESUMO Há diversos usos para as cápsulas porosas na agricultura, contudo, estas devem ser caracterizadas por parâmetros de avaliação como pressão de borbulhamento e condutância hidráulica. O objetivo da pesquisa foi aferir as características físicas de cápsulas porosas para uso na irrigação localizada. Para o sistema de irrigação proposto, utilizaram-se dez cápsulas porosas na execução do ensaio experimental que consistiu em um delineamento inteiramente casualizado com três tratamentos, constando de diferentes manejos de irrigação (manejo via clima, via solo e via cápsula porosa) com dez repetições, totalizando 30 unidades experimentais, tendo sido avaliados parâmetros de produção e crescimento da cultura do rabanete. A pressão de borbulhamento média observada foi de 2,34 atm, enquanto a condutância hidráulica apresentou valor médio de 9,27 x 10-6 cm² s-1. Para a cultura em estudo não houve diferenças entre os tratamentos estudados, sendo que a massa fresca da raiz apresentou valores de 7,4 g planta-1 para o manejo via clima e 4,7 g planta-1 para o manejo via cápsula porosa, não sendo estatisticamente diferentes pelo teste de Tukey (p<0,05). O uso de sistema de irrigação por cápsulas porosas apresenta-se como uma alternativa viável para o cultivo de hortaliças em pequenas áreas. Palavras-chave: Pressão de borbulhamento, condutância hidráulica, emissor. FELÍCIO; P. I. A.; RIBEIRO, R. S. F.; SILVA. A. O.; ARAÚJO, J. C.; COSTA, R. N. T. PHYSICAL CHARACTERISTICS OF POROUS CAPSULES FOR USE IN IRRIGATION SYSTEM LOCATED 2 ABSTRACT There are different uses for porous capsules in agriculture, however they must be characterized by assessment parameters like bubbling pressure and hydraulic conductance. The objective of this work was to measure physical characteristics of porous capsules for localized irrigation use. For the proposed irrigation system, porous capsules were used in the execution of experimental trial, consisting of a completely randomized design with three treatments, different irrigation managements (climate management, soil management and porous capsule management) with 10 replications, totaling 30 experimental units, the culture chosen was radish, and parameters of production and growth were assessed. The average bubbling pressure found was 2.34 atm, while conductance presented values of 9.27 x 10-6 cm² s-1. For the crop study, differences between the treatments studied by the Tukey test (p <0.05) were not found; fresh root mass presented values of 7.4 g plant-1 for the climate management and 4.7 g plant-1 for management of porous capsule. The use of porous capsule irrigation systems is a viable alternative for growing vegetables in small areas. Keywords: Bubbling pressure, hydraulic conductance, emitter.

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IDENTIFIKASI DAN UJI PENGENDALIAN HAMA DAUN JABON SECARA INVITRO

Jurnal Sains Natural ◽

10.31938/jsn.v4i1.75 ◽

2017 ◽

Vol 4 (1) ◽

pp. 51

Author(s):

Ujang W. Darmawan ◽

Agus Ismanto

Keyword(s):

Bacillus Thuringiensis ◽

Pest Species ◽

Control Test ◽

Control Effort ◽

Tukey Test ◽

Randomized Design ◽

Completely Randomized Design ◽

Biological Pesticide ◽

And Control ◽

Organic Pesticides

Identification and Control Test of Jabon Leaf Pest by Invitro One of problem in jabon (Neolamarckia cadamba [Roxb.] F. Bosser) plantation is defoliator. Identification and control effort are needed to counter this problem. This research was intended to identify pest species attacking plant and do efficacy test of several chemical and biological pesticides against the defoliator. The statistical method of efficacy was Completely Randomized Design (CRD). Two pesticides prophenophos (0,1%) and dimethoate (0,1%) as chemical based organic pesticides and Bacillus thuringiensis(0,5 g/l) as biological pesticide were tested against the defoliator. Data was analyzed using Anova and Tukey test at 95% confidence level. The result showed that pest was identified as Dysarthria quadricaudata. Chemical and biological pesticides were effective to control the pest.Keywords: Neolamarckia cadamba, Dysarthria quadricaudata, prophenophos, dimethoate, pest. ABSTRAK Salah satu persoalan pada hutan tanaman jabon (Neolamarckia cadamba [Roxb.] F. Bosser) adalah serangan hama perusak daun. Pengendalian diperlukan untuk mengatasi persoalan ini. Penelitian bertujuan untuk mengidentifikasi spesies hama dan melakukan efikasi beberapa jenis pestisida kimia dan organik terhadap hama ulat daun jabon (N. cadamba). Metode yang digunakan adalah rancangan acak lengkap. Dua jenis pestisida kimia berbahan profenofos (0,1%), dan dimetoat (0,1%) serta pestisida organik berbahan dasar Bacillus thuringiensis (0,5 gr/lt) diuji terhadap hama ulat daun. Data dianalisis menggunakan Anova dan uji Tukey (CI = 95%). Hasil penelitian menunjukkan bahwa spesies hama yang menyerang tanaman jabon adalah Dysarthria quadricaudata. Jenis pestisida tersebut efektif mengendalikan hama ulat daun jabon.Kata kunci: Neolamarckia cadamba, Dysarthria quadricaudata, profenofos. dimetoat, hama

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Physiological potential of Dyckia spp. bromeliad seeds under different temperatures

Semina Ciências Agrárias ◽

10.5433/1679-0359.2021v42n5p2639 ◽

2021 ◽

Vol 42 (5) ◽

pp. 2639-2650

Author(s):

Verônica Pellizzaro Moresco ◽

◽

Mônica Satie Omura ◽

Jean Carlo Baudraz de Paula ◽

Felipe Favoretto Furlan ◽

...

Keyword(s):

Growth And Development ◽

Ornamental Plants ◽

Dry Weight ◽

Natural Environments ◽

The Third ◽

Tukey Test ◽

Seed Physiology ◽

Randomized Design ◽

Different Temperatures ◽

Completely Randomized Design

Bromeliads have been gaining ground in the economic scenario due mainly to their use as ornamental plants. Bromeliads of the genus Dyckia exhibit different morphologies, and therefore, have relevance in this market. However, some species are threatened due to the extraction of plants from their natural environments. Many of these species are endemic and native to Brazil and there are few studies on their seed physiology; hence, expansion of research into this topic is essential. An alternative for the preservation of such plants is the production of seedlings using seeds. To this end, the objective of this work was to evaluate the physiological potential of seeds of Dyckia brevifolia, Dyckia beateae, and Dyckia excelsa at different temperatures, and determine the number of days to carry out the tests. A completely randomized design was adopted, with three species of Dyckia, analyzed separately, and four temperatures (20, 25, 30, and 35 °C). The following were evaluated: first germination count, germination, germination speed index, length of seedling, and seedling dry weight. The data were analyzed using the Sisvar software for normality and homogeneity, and when the assumptions were met, they were subjected to analysis of variance using the F test (p < 0.05) and the means were compared using the Tukey test at 5% probability. Seeds of D. excelsa emit the radicle more quickly at 20 and 35 °C; however, temperatures of 25 and 30 °C provide better conditions for seedling growth and development. The greatest vigor of D. brevifolia seeds is observed at temperatures of 30 and 35 °C. Seeds of D. beateae emit the radicle more quickly at 20 °C, and the largest seedlings are observed at 35 °C. The first germination count of D. brevifolia, D. beateae, and D. excelsa should be evaluated on the third day after sowing. The germination evaluations for D. excelsa and D. beateae should be carried out on the ninth day after sowing, and those for D. brevifolia on the sixth day after sowing.

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Quality of brown-shelled eggs marketed in different commercial establishments

Acta Scientiarum Animal Sciences ◽

10.4025/actascianimsci.v42i1.46552 ◽

2020 ◽

Vol 42 ◽

pp. e46552

Author(s):

Thiago Souza ◽

Claudia da Costa Lopes ◽

Rita Brito Vieira ◽

Gabriela Coelho Santos ◽

Rodrigo Ferreira Silva ◽

...

Keyword(s):

Internal Quality ◽

Grocery Stores ◽

External Quality ◽

Shell Eggs ◽

Tukey Test ◽

Randomized Design ◽

Completely Randomized Design ◽

The City ◽

Haugh Unit

This study aimed at evaluating the internal and external quality of brown-shelled eggs commercialized in the municipality of Parintins-AM. A total of 540 eggs were evaluated and distributed in a completely randomized design, which consisted of three treatments and six replications of 30 eggs each. The treatments were: eggs sold in supermarkets; in grocery stores; and eggs sold directly at the farm. The age of the eggs from supermarkets and grocery stores was unknown, however, the eggs bought at the farm were marketed as being from the day of laying. The collected data were submitted to analysis of variance and Tukey test at 5% probability. There were no differences (p > 0.05) of treatments in the percentage of dirty eggs, however, grocery and farm eggs presented higher (p < 0.05) crack percentage. The eggs at the farm presented higher incidence (p < 0.05) of internal stains of blood. The weight of the egg and albumen presented no differences (p > 0.05). However, the albumen percentage of the farm eggs was higher than the other treatments (p < 0.05). The percentages for yolk and eggshell weight from the farm eggs were lower than the supermarket and grocery eggs (p < 0.05). For the variables albumen height, Haugh unit, albumen index, yolk and albumen pH, the best results were observed for the farm eggs, however, regarding these variables, eggs sold in supermarkets and grocery stores did not differ from each other. The brown shell eggs sold in the city of Parintins/AM have high rates of external defects, and the eggs bought directly from the farm presented better internal quality, when compared to eggs sold in different establishments.

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Bioaccumulation Potentials of Momordica charantia L. Medicinal Plant Grown in Lead Polluted Soil under Organic Fertilizer Amendment

Notulae Scientia Biologicae ◽

10.15835/nsb739580 ◽

2015 ◽

Vol 7 (3) ◽

pp. 289-294

Author(s):

Ojo Michael OSENI ◽

Omotola Esther DADA ◽

Adekunle Ajayi ADELUSI

Keyword(s):

Medicinal Plant ◽

Organic Fertilizer ◽

Atomic Absorption Spectrophotometry ◽

Bioaccumulation Factor ◽

Plant Tissues ◽

Randomized Design ◽

Safe Limit ◽

Plant Grown ◽

Completely Randomized Design ◽

Translocation Factors

This study investigated bioaccumulation factors and translocation factors of lead (Pb) by M. charantia so as to ascertain the bioaccumulation potentials of this medicinal plant. The elemental deposition of Pb were also assessed in order to compare the concentration of Pb present in plant tissues with the maximum permissible limits of 10 ppm recommended by WHO (1998, 2007). The experiment was a factorial combination of one heavy metal (Pb) at five levels of concentrations (0, 200, 400, 800 and 1,000 ppm) in a completely randomized design, replicated three times, with one medicinal plant species and two levels (0 and 9.4 g) of organic fertilizer (OBD- Plus). The seedlings were transplanted from nursery to experimental pots at the rate of one seedling per pot and grown for 10 weeks, after which the plants were harvested and dried for the analysis of Pb concentration both in soil and plant tissues using Atomic Absorption Spectrophotometry (AAS). The highest bioaccumulation factor for roots was 0.42 under fertilizer amendment, whereas the highest bioaccumulation factor for shoots was 0.26 under the same treatment. The highest transfer factor of M. charantia was 0.6. The results showed that M. charantia is a good phytostabilizer of Pb component. The highest lead deposition in the roots, which was 40% higher than in the shoots concentration, was above the safe limit; therefore this might pose health risks to human if consumed as herbal medicine.

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Accelerated aging test in niger seeds

Journal of Seed Science ◽

10.1590/2317-1545v37n315 ◽

2015 ◽

Vol 37 (3) ◽

pp. 234-240 ◽

Cited By ~ 3

Author(s):

Carla Regina Baptista Gordin ◽

Silvana de Paula Quintão Scalon ◽

Tathiana Elisa Masetto

Keyword(s):

Seedling Emergence ◽

Accelerated Aging ◽

Biodiesel Production ◽

Germination Test ◽

Decay Period ◽

Content Variation ◽

Randomized Design ◽

Accelerated Aging Test ◽

Aging Test ◽

Completely Randomized Design

Abstract:Niger is a promising oilseed species for biodiesel production but there is no much information about the physiological potential of its seeds. Thus, the aim was to adapt the methodologies of accelerated aging test on six lots of niger seeds. The test was carried out by traditional and with saturated salt solution (20 and 40 g NaCl.100 mL-1) methods at 41 and 45 °C for 24, 48, 72 and 96 hours. After the decay period, the seeds were submitted to the germination test, proceeding to an evaluation on the seventh day after sowing, counting the normal seedlings percentage. A completely randomized design with four replications of 50 seeds was used and the means were compared by Tukey's test. The accelerated aging test was correlated with seedling emergence and provided lots classification in at least two levels of vigor. For the accelerated aging test, the method with 20 g NaCl.100 mL-1 at 41 °C for 24 hours is recommend. The traditional method is not suitable because it provides water content variation between samples above what is tolerable.

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