Optimization of Grading Efficiency of a Specific Gravity Separator to Upgrade the Quality of (Moringa oleifera Lam.) Seeds

2020 ◽  
Vol 107 (10-12) ◽  
Author(s):  
Chandraprakash R ◽  
◽  
Masilamani P ◽  
Rajkumar P ◽  
Geetha R ◽  
...  
Keyword(s):  
Specific Gravity ◽  
Moringa Oleifera ◽  
Seed Quality ◽  
Physical Property ◽  
Germination Percentage ◽  
Design Parameters ◽  
Gravity Separator ◽  
Grade Material ◽  
Vertical Height

The quality of Moringa oleifera seeds need to be ensured before sowing or using the seeds for other commercial purposes like oil extraction. In this study, an attempt was made to increase the efficiency of a specific gravity separator machine to upgrade the quality of moringa seed by suitably changing the machine settings viz., horizontal height (cm), vertical height (cm), and oscillation speed (rpm) of the deck and air blow rate (m3/hr). The optimization of moringa seed quality upgrading specific gravity machine has a horizontal height (cm), vertical height (cm), and air blow rate (m3/hr) adjustments of 0, 1.5, and 4.0 respectively at 450 rpm of deck oscillation. Under the above-optimized conditions, seed lot graded into five categories viz., A, B, C, D and E. Germination percentage of three grade viz., C, D, and E have 93.0%, 97.0%, and 96.0% respectively, which was higher than the germination percentage of ungraded bulk moringa seed lot (91.0%) used in this experiment. Seed with undesirable size and low in weight got separated as ‘A’ grade material. The optimization of moringa seed upgarding process showed the optimal processing conditions for grading the moringa seed based on physical property of the seed. The optimization of the moringa seed-grading machine would provide necessary information on combination of seed, operation and design parameters for enhancing seed quality.

Effectiveness of Seed Processing Machinery on Seed Quality Improvement in Paddy (Oryza sativa L.)

2016 ◽  
Vol 3 (3) ◽  
Author(s):  
RABINDRA KUMAR
Keyword(s):  
Quality Improvement ◽  
Specific Gravity ◽  
Seed Quality ◽  
Oryza Sativa L ◽  
Medium Term ◽  
Seed Processing ◽  
Seed Loss ◽  
Processing Line ◽  
Gravity Separator ◽  
Term Storage

A series of seed-processing machines were used to evaluate seed quality improvement in paddy during the Kharif season 2013-14. The processing machines proved an efficient tool in producing quality seeds. The consistent and higher seed quality (germination 91.67% and physical purity 99.83%) could be achieved by efficient use of processing machines. The product and separate (reject) from individual machines were analysed to evaluate machine efficiency in separating the seed components as well as impurities from the harvested lot. The air-screen machines were found effective in removing dead seeds, whereas specific gravity separator removed abnormal seeds significantly. Gradual increase in seed quality was recorded with decrease in recovery in the processing line. Seed loss in reject port was always associated with handling of seed lots by each machine and observed only 1.30%. Specific gravity separator was found essential for the seed lot of medium-term storage or for the buffer stocking.

scholarly journals Seed Harvesting at Different Maturity Stages of Siliqua on Seed Quality of Rapeseed-Mustard Varieties

2020 ◽  
Vol 22 (1) ◽  
pp. 121-130
Author(s):  
AHMMR Talukder ◽  
M Biswas ◽  
MNH Miah ◽  
MA Kashem ◽  
L Nahar
Keyword(s):  
Seed Quality ◽  
Germination Percentage ◽  
Maturity Stage ◽  
Pale Yellow ◽  
Maturity Stages ◽  
Vigor Index ◽  
Root And Shoot Length ◽  
Golden Yellow ◽  
Full Maturity

A laboratory experiment with three replicates was conducted at Plant Physiology Division research laboratory of Bangladesh Agricultural Research Institute (BARI) during November, 2015 to observe the seed quality of rapeseed-mustard by harvesting at different maturity stages of siliqua. Seeds were collected from siliqua of different rapeseed-mustard varieties and harvesting was made at different maturity stages based on their external color i.e., Green, pale yellow, Golden yellow and full maturity stage of siliqua. After harvesting of siliqua as per external color seeds were dried naturally about 48 hours and were packed in polythene and stored at laboratory environment for next season uses. Under laboratory condition seeds were evaluated in terms of moisture and germination percentage, speed of germination, root and shoot length, vigor index etc. Moisture content was found significantly at elevated level in respect of mustard varieties of BARI Sarisha-14 (V2), BARI Sarisha-6 (V3) and Tori-7 (V4).  The variety Tori-7 and BARI Sarisha-14 showed  the highest vigor index-II & vigor index-I, respectively. Among the harvesting stages, most of the parameters showed the highest standards in seeds harvesting at full maturity of siliqua stage (H4) followed by the golden yellow siliqua stage (H3) and pale yellow siliqua stages seeds (H2).Irrespective of rapeseed-mustard varieties seed collected from golden yellow and pale yellow siliqua stages could  be stored up to twelve month for next season without significant loss in terms of germination percentage and vigor followed by full maturity stages of siliqua harvested seeds (H4). Bangladesh Agron. J. 2019, 22(1): 121-130

scholarly journals Effect of drying, pelliculation and storage on the physiological quality of eggplant seeds

2014 ◽  
Vol 36 (2) ◽  
pp. 240-245 ◽  
Author(s):  
Natassia Zamariola ◽  
João Almir Oliveira ◽  
Luiz Antônio Augusto Gomes ◽  
Michelle Fonseca Jácome ◽  
Leandro Vilela Reis
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Film Coating ◽  
Germination Percentage ◽  
Hybrid Seeds ◽  
Physiological Quality ◽  
Forced Air ◽  
Air Circulation ◽  
And Storage

The use of methods and technologies such as drying and film coating can bring significant contributions to the farmer. This experiment was conducted in order to evaluate the effect of drying and film coating on the physiological quality of eggplant seeds during storage. Hybrid seeds UGA MS1 produced by the company Hortiagro - Ijaci, MG were used. Seeds were subjected to two types of drying: slow (room temperature) and quick (oven with forced air circulation at 35 ºC). The chemical treatment was performed with the Captan product at a dose of 250 grams per 100 kilograms of seed and for the recoating were used three doses of polymer: (0, 3 and 6 mL.kg-1 of seeds). The physiological quality of seeds was evaluated every three months until reaching the period of nine months using germination test, seedling emergence test and seedling establishment. There is a reduction of physiological seed quality during the storage. The slow drying of eggplant seeds results in better quality seeds. The use of polymer reduces the germination percentage, germination speed index and the percentage of seedling emergence.

scholarly journals Temporal variation in seed quality of Indian spinach preserved in different containers

2016 ◽  
Vol 5 (2) ◽  
pp. 51-57 ◽  
Author(s):  
M Kamruzzaman ◽  
S Khatun ◽  
A Rakib ◽  
MI Hoque ◽  
MH Rani
Keyword(s):  
Moisture Content ◽  
Seed Quality ◽  
Initial Moisture Content ◽  
Dry Weight ◽  
Germination Percentage ◽  
Seedling Vigor ◽  
Fresh Weight ◽  
Seed Technology ◽  
Vigor Index

The experiment was conducted to investigate the seed quality of Indian spinach for three months stored at different containers (Plastic pot, polythene bag and cloth bag) during 2013-2014 at Seed Technology Laboratory of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur. The initial moisture content of the seed was 9.89% with 75.00% germination. However, after two months, the seed had a different range of increased moisture content with reduced germination percentage depending upon the packing materials. Among the three containers, seeds stored at cloth bag absorbed more moisture (14.36%) from surrounding atmosphere followed by the moisture content, 12.67% and 11.50% of polythene bag and airtight plastic pot, respectively. Seeds stored at plastic pot, polythene bag and cloth bag exhibited 65.00, 64.00 and 50.00 per cent germination, respectively. Similarly, the fresh weight and dry weight of seedling and seedling vigor were also decreased. The seeds of plastic pot were good in term of germination capacity, fresh and dry weight and vigor index in comparison to those stored at cloth bag and polythene bag.Int. J. Agril. Res. Innov. & Tech. 5 (2): 51-57, December, 2015

scholarly journals The Effect of Stage of Harvest and Storage on the Seed Quality of Chickpea (Cicer arietinum L.)

1970 ◽  
Vol 44 (3) ◽  
pp. 303-310
Author(s):  
A Khatun ◽  
MAH Bhuiyan ◽  
MM Ud-deen
Keyword(s):  
Moisture Content ◽  
Root Length ◽  
Laboratory Experiments ◽  
Seed Quality ◽  
Dry Weight ◽  
Germination Percentage ◽  
Shoot Length ◽  
Harvesting Stage ◽  
And Storage

Laboratory experiments were carried out to determine the effects of harvesting stages on the seed quality of chickpea. Chickpea seed of three varieties (BARI Chola-5, BARI Chola-6 and BARI Chola-8) were collected at three harvestings times i.e. from three different times at 7 days interval prior to harvesting, viz. i) when the pods were yellowish with a few yellow greens (H1 stage), ii) when most of the pods were light brown with a few yellow (H2 stage), and iii) when all the pods were completely brown and dry (H3 stage). Significant variation was observed in three varieties of chickpea for all the parameters studied except vigour-I. The highest germination percentage, root length, shoot length, root plus shoot length and vigour-II was observed in BARI Chola-5 which was significantly higher over BARI Chola-8. Dry weight was found to be significantly higher in BARI Chola-8 which was identical to BARI Chola-6. Moisture content was significantly higher in BARI Chola-8. Seed collected at the stage when most of the pods were light brown with a few yellow (H2 stage) recorded the highest germination percentage, dry weight, vigour-I and root length. Pods (H1 stage) gave the highest moisture content in seeds. BARI Chola-5 seeds recorded the highest germination at H2 stage. Interaction effects of varieties and harvesting stage had non-significant effect on germination percentage, vigour-I, shoot length and vigour-II in both the years. Keywords: Chickpea, Harvesting stage, Storage, Vigour, Moisture, Germination DOI: 10.3329/bjsir.v44i3.4403 Bangladesh J. Sci. Ind. Res. 44(3),303-310, 2009  

scholarly journals Seed quality of common bean accessions under organic and conventional farming systems1

2017 ◽  
Vol 47 (2) ◽  
pp. 152-160 ◽  
Author(s):  
Diego Medeiros Gindri ◽  
Cileide Maria Medeiros Coelho ◽  
Clovis Arruda Souza ◽  
Isaac Heberle ◽  
Heitor Amadeu Prezzi
Keyword(s):  
Common Bean ◽  
Seed Quality ◽  
Accelerated Aging ◽  
Farming Systems ◽  
Cold Test ◽  
Germination Percentage ◽  
Conventional Farming ◽  
Physiological Quality ◽  
Organic And Conventional Farming

ABSTRACT Agrobiodiversity is essential for a sustainable food production, and the knowledge of the potential characteristics of landrace seeds may prompt farmers to adopt the habit of seed conservation for this species. This study aimed at categorizing landrace and commercial common bean (Phaseolus vulgaris L.) accessions, according to the physiological quality (viability and vigor) of seeds produced in the field, during two growing seasons, under organic and conventional farming systems. Germination percentage, field emergence, electrical conductivity, accelerated aging, cold test and seedling length were assessed. The landrace bean accessions exhibit diversity in the physiological seed quality, in terms of their viability and vigor. No differences were observed between the farming systems, in relation to the physiological quality of the seeds produced. The categorization of landrace common bean accessions allows to identify those with superior physiological seed quality.

scholarly journals Influence of Different Maturity Stages on Tomato (Solanum lycopersicum L.) Seed Quality during Storage at -20°C

2021 ◽  
Author(s):  
Rashied Tetteh ◽  
Lawrence Misa Aboagye ◽  
Robert Darko
Keyword(s):  
Seed Quality ◽  
Storage Period ◽  
Freezing Temperature ◽  
Germination Percentage ◽  
Vegetable Crops ◽  
Seed Vigour ◽  
Maturity Stages ◽  
Solanum Lycopersicum L ◽  
Tomato Seeds

Background: Tomato is one of the most important vegetable crops in the world due to its dietary value. Harvesting and storing of physiologically matured tomato seeds is very important to secure good quality seeds for future use in a changing climate. The objective of the study was to assess the effect of maturity stages on seed quality of two tomato accessions during cold storage. Methods: Seeds of two tomato accessions extracted at four maturity stages (i.e. initially ripe, half ripe, fully ripe and rotten) were stored at -20oC in a deep freezer for 12 months. The quality of stored seeds was measured by seed vigour and germination percentage at 3, 6, 9 and 12 months after storage. Conclusion: The study showed significant differences in seed vigour and germination percentage at 3, 6, 9 and 12 months after storage (MAS) among the maturity stages. Seeds extracted at the initially ripe stage in GH 9305 had the least vigour at 3, 6, 9 and 12 MAS. The highest reduction in seed quality during the storage period was observed in seeds extracted at the rotten stage in both accessions. Seed vigour and germination were higher in GH 9207 than GH 9305. Storage of physiologically matured tomato seeds at freezing temperature is necessary to reduce seed ageing and to maintain high seed quality.

scholarly journals Classification and quality of Acca sellowiana (O. Berg) Burret seeds as to tolerance to desiccation

2020 ◽  
Vol 9 (8) ◽  
pp. e681985458
Author(s):  
Larissa Corradi Voss ◽  
Marciele Filippi ◽  
Ana Elisia Sohne ◽  
Moeses Andrigo Danner ◽  
Alexandre Giesel ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Seed Quality ◽  
Block Design ◽  
Germination Percentage ◽  
Randomized Block Design ◽  
Germination Speed ◽  
Radicle Emergence ◽  
The Moment ◽  
Acca Sellowiana

The objective of this paper was to determine the physiological behavior and seed quality of five genotypes of Acca sellowiana regarding desiccation. Seeds were obtained from five plants of urban backyards in the cities of Dois Vizinhos - PR (A1, A2) and Vacaria - RS (A3, A4, A5). The experiment was conducted in a bifactor arrangement (5x3), with five genotypes and three levels of water content (28%, 15% and 5%), arranged into complete randomized block design, with four replicates of 50 seeds each. Seeds were germinated on absorbent paper soaked with water, being kept in BOD chamber under temperature of 25±3°C with photoperiod of 16 hours. Germination percentage, speed index and average time were assessed by counting seeds every two days for 50 days, starting from the moment of radicle emergence. No significant differences were observed for germination percentage and all genotypes surpassing 79% of germination. Desiccation of seeds had low influence on germination speed index and average time of germination, although genotype influence was verified due to genetic variability. Genotype A5 has seeds with superior quality from the others. Acca sellowiana seeds have orthodox behavior.

scholarly journals Quality of Vegetable Seeds Collected from Mymensingh Region in Bangladesh

2014 ◽  
Vol 2 (1) ◽  
pp. 103-108
Author(s):  
I. Hossain ◽  
P. Dey ◽  
K. Dilruba
Keyword(s):  
Seed Quality ◽  
Germination Percentage ◽  
Bottle Gourd ◽  
Amaranthus Tricolor ◽  
Seedling Vigour ◽  
Basella Alba ◽  
Brassica Oleraceae ◽  
Total Seed ◽  
Penicillium Spp

Seed quality and health status of 11 vegetable crop seeds of viz. Cabbage (Brassica oleraceae var. capitata), Indian cabbage (Brassica oleraceae var. indica), Indian spinach (Basella alba), Spinach (Beta vulgaris var. bengalensis), Red amaranth (Amaranthus tricolor), Bitter gourd (Momordic acharantia), Bottle gourd (Lagenaria siceraria), Sweet gourd (Cucurbita moschata), Carrot (Daucuscarrota var. sativa),  Radish (Raphanus sativus), and Turnip (Brassica rapa) collected from the greater Mymensingh region of Bangladesh were tested. The germination percentage of seeds of the collected samples ranged from 11 to 100. The highest germination was recorded in indian cabbage (100%) followed by carrot (92%) and radish (90%), while the lowest was recorded in indian spinach seeds (11%). Altogether 10 fungi were found associated with the seeds which were Alternaria spp., Aspergillus flavus, Aspergillus niger, Botrytis cinerea, Chaetomium funicola, Curvularia spp., Fusarium spp., Penicillium spp., Phoma spp. and Rhizopus spp.. The highest total seed-borne fungal infection was found in bottle gourd (155%) followed by sweet gourd (145%). The lowest infection was found in turnip seeds (6%). The maximum number of dead seeds was found in indian spinach (89%) and no dead seed was found in indian cabbage. Among the vegetables seed samples, seedling vigour ranged from 59 to 3083, where the highest seedling vigour was observed in sweet gourd (3083) and the lowest was in indian spinach (59). DOI: http://dx.doi.org/10.3126/ijasbt.v2i1.9926 Int J Appl Sci Biotechnol, Vol. 2(1): 103-108

scholarly journals Assessment of the effectiveness of storage structures for maintaining the quality of maize seed stored at different moisture levels

2021 ◽  
Vol 4 (1) ◽  
pp. 96-110
Author(s):  
Santosh Marahatta
Keyword(s):  
Seed Quality ◽  
Smallholder Farmers ◽  
Germination Percentage ◽  
Shoot Length ◽  
Storage Duration ◽  
Seed Testing ◽  
Seed Moisture ◽  
Root And Shoot Length ◽  
Storage Structures

One of the main causes of food insecurity is the timely unavailability of quality seeds for smallholder farmers in developing countries. Improved storage technologies are effective in reducing storage losses. Thus, the objective of this research is to assess the traditional and emerging seed storage structures/materials for the maintenance of seed qualities. The effect of different storage conditions (moisture content of seed at the time of storage, i.e. 12±0.15% and 13.5±0.18%; storage containers such as metal bin, earthen pot, Purdue Improved Crop Storage (PICS) bag, and jute bag) on seed qualities of maize were assessed. The seed was collected from Chitwan, Nepal and a laboratory experiment was conducted at the central seed testing laboratory, seed quality control center (SQQC), Hariharbhawan, Lalitpur. The experiment was done using a two-factor complete randomized design in a four replicates design. Data regarding the seed qualities (seed moisture percentage, germination percentage, root and shoot length, and vigor index) just before store and also at 45, 90, 135, 180, and 240 days after storage (DAS) was performed as per the standard followed by  International Seed Testing Association (ISTA). The germination percentage, root, and shoot length decreased with increasing storage duration. The seed stored in the higher moisture level had significantly higher seed moisture throughout the storage duration. Seed stored in the traditional structures (jute bag and earthen pot) had lower seed moisture at 120 and 180 DAS. The seed stored at lower moisture resulted in a higher germination percentage, long root, and shoot length. Up to six months of storage germination of maize seeds stored in the earthen pots, PICS bag, and Jute bags were statistically similar. The traditional storage structures are equally effective for the maintenance of seed quality of maize.

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