Use of densimetric table to improve the quality of commercial castor bean seeds

Neto, Antônio Lucrécio dos Santos; Carvalho, María Laene Moreira de; Oliveira, João Almir; Fraga, Antônio Carlos; Souza, Ademária Aparecida de

doi:10.1590/s0101-31222012000400004

Cited by 6 publications

(9 citation statements)

References 14 publications

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“…The seeds sized 9 mm of the genotype EVF 103 presented the highest specific mass after processing (Table 3). Neto et al (2012) verified that castor seeds from two lots, expressly those which had been recovered at the upper outlet of the densimetric table, exhibited greater mass of one thousand seeds, in contrast to those sorted by the remaining outlets. Conrad et al (2017) reported that this variable diverged among the collection points as well, and attributed the fact to the influence of sieve size.…”

Section: Resultsmentioning

confidence: 78%

“…Obtaining castor seeds with high physiological, physical, and sanitary properties, capable of generating vigorous plants that can establish an adequate stand, is one of the hindrances for large-scale production (Neto et al, 2012). Besides, Machado et al (2010) linked the seed supply shortage and low quality of the beans to the fact that the cultivation still occurs with the farmer's matrices, which generally are highly heterogeneous and include a broad diversity of cultivars.…”

Section: Introductionmentioning

confidence: 99%

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Physiological quality of castor seeds (Ricinus communis L.) after processing

et al. 2019

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Castor bean seeds are the raw material used for extracting oil destined to pharmaceutical and industrial ends. The appropriate application of post-harvest technologies, such as processing, is required to ensure the production of top quality seeds. Thus, this study aimed at assessing the physiological quality of seeds from two castor bean genotypes, classified according to their specific mass and size. Castor seeds of the genotypes EVF102 and EVF103 were mechanically harvested and then classified with the aid of cylindrical sieves and a densimetric table. This procedure was conducted at the processing unit of the company Sementes Goiás LTDA [Goiás Seeds Co.]. Evaluations of seed physiological quality were carried out in the Seed Laboratory of Instituto Federal Goiano, following a completely randomized design. The testing was conducted in four replicates, in a 2 x 2 x 5 factorial scheme (two genotypes x two sizes x five specific masses). The following parameters were appraised: (a) mass of one thousand seeds; (b) germination; (c) germination speed index; (d) emergence test; (e) emergence speed index; (f) electrical conductivity; and (g) accelerated aging. Genotype EVF102 seeds sized 8 mm, as classified by the densimetric table, showed the highest physiological quality, considering the germination, germination speed index, and emergence. Seeds of the genotype EVF103, sorted by size, exhibited no difference in physiological quality.

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Section: Resultsmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Physiological quality of castor seeds (Ricinus communis L.) after processing

et al. 2019

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“…The processing of seeds is a crucial step in the production chain because it aims to improve batch characteristics, improve the physical attributes, preserve the germination percent and avoid pests and seed diseases (Araujo, Araujo, Zonta, Vieira, & Donzeles, 2011;Santos Neto et al, 2012;Santos, 2015).…”

Section: Resultsmentioning

confidence: 99%

“…Processing may be classified as the set of operations that seek to improve physical purity, achieve a standard quality, preserve the germination percentage and avoid pests and diseases in the seeds (Santos Neto, Carvalho, Oliveira, Fraga, & Souza, 2012). In cases of forest species seeds, processing is considered minimal because only impurities are eliminated, so knowledge and improvement of this operation is crucial to obtain pure seeds with great germinating potential, enabling the formation of seedlings.…”

Section: Introductionmentioning

confidence: 99%

Processing and physical and physiological quality of the native forest seeds of <i>Vernonanthura discolor

et al. 2018

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The objective was to study the processing of Vernonanthura discolor seeds, evaluating their physical and physiological qualities and defining parameters for purity analysis and determine the weight of one thousand seeds. The seeds extracted from the infructescences were processed in a blower, testing combinations of openings of the calibration valve and the side air passage. After processing, the seeds went through water content determination, germination tests, first count of the germination test, purity analysis, weight of one thousand seeds and percentage of full seeds. Compared to the control, seeds processed in a regulated blower with the calibrator valve in position 10 plus three 360° turns of side air passage obtained an approximately threefold increase in germination and vigour and had 96% purity. We conclude that the processing of V. discolor seeds was best done by combining the rubbing of the seeds on circular sieves (1.8 and 1.6 mm in diameter) and then passage in an adjusted seed blower (calibration valve in position 10 plus three 360° turns of side air passage). The weight of one thousand seeds is 0.500 g, and the working sample for purity analysis must be 1.3 g.

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“…The adjustments made to the gravity separator are loading, lateral and longitudinal inclinations, air flow, the vibration movement and fractionation of the load terminal axis. The seeds of different densities separated spouts out through the gravity separator output (Santos-Neto et al, 2012). This study aims to assess the influence of isolated and combination of equipment used during the flow of the processing on the physical and physiological quality of seed batches of soybean cultivar.…”

Section: Introductionmentioning

confidence: 99%

Influence of Seed Processing and Storage on Seed Quality of Soybean Var. DSb-21

wanath¹,

Hunje²,

Gurumurthy³

et al. 2019

Int.J.Curr.Microbiol.App.Sci

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to study the influence of seed grading and specific gravity separator on seed quality parameters of soybean var. DSb-21. Among the three sieve size used 3.75 mm recorded higher recovery (77.60%), seed germination (85.00%) and seedling vigour index (3293) followed by 4.00 mm (75.20%, 84.33% and 3179, respectively) and 4.80 mm (66.00%, 81.67% and 3016, respectively) over other sieves used under study, indicating that Seeds obtained from specific gravity separator after processing through seed grader from below recommended sieve size -3.75 mm processing equipment's have great impact upgrading the seed quality.

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Use of densimetric table to improve the quality of commercial castor bean seeds

Cited by 6 publications

References 14 publications

Physiological quality of castor seeds (Ricinus communis L.) after processing

Physiological quality of castor seeds (Ricinus communis L.) after processing

Processing and physical and physiological quality of the native forest seeds of <i>Vernonanthura discolor

Influence of Seed Processing and Storage on Seed Quality of Soybean Var. DSb-21

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