Processing in the Quality of Tanzania Grass Seeds

Melo, Lilian Faria de; Martins, Cibele Chalita; Silva, Givanildo Zildo da; Sanches, Maurício Feis Ganz

doi:10.1590/1809-4430-eng.agric.v36n6p1157-1166/2016

Cited by 8 publications

(10 citation statements)

References 14 publications

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“…Such outcome was corroborated by the production rate and by the asymptotic deceleration point (ADP) (Figures 2 and 3). The present results comply with the ones reported by other authors Melo (2016b), and show the importance of applying vigor tests to forage species. Faster germination speed resulting from seed weight gain was also reported by Larsen and Andreasen (2004) in his study about forage species Festuca rubra, Lolium perene and Poa pratensis.…”

Section: Classessupporting

confidence: 93%

Nonlinear modeling proposal for the germination performance of Paspalum regnellii seeds: a species with forage potential in Brazil

et al. 2019

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Finding qualified standard plants is an essential requirement in the search for high-quality pasture, fact that involves knowledge about the performance of the assessed seeds. Therefore, the aim of the present study was to evaluate the influence of seed weight on the germination behavior of Paspalum regnellii seeds through the logistic growth model. The adopted values were taken from an experiment conducted in 2016 under laboratory conditions. A pneumatic separator was used to select four seed classes, depending on the weight of one thousand seeds namely: Extra light, light, middle and weighted. The logistic model was adjusted to data about the germination rate of each class, and the parameters were compared through the F test. Germination rates between classes were compared based on recorded parameters and on model critical points. The logistic model adjusted well to the values and made it possible to use the parameters and critical points of the curve to describe the germination process. In addition to have low germination rate, seeds in the light-weight batch demanded longer to complete this process. Based on estimates about the parameters and the critical points of the model, the weighted-weight seeds were superior in terms of quality than seeds in the other batches, since they recorded higher germination rate in a shorter period-of-time.

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Section: Classessupporting

confidence: 93%

Nonlinear modeling proposal for the germination performance of Paspalum regnellii seeds: a species with forage potential in Brazil

et al. 2019

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“…The lower discharge of the gravitational table usually separates P. maximum seeds (Melo et al, 2016a(Melo et al, , 2016b and Nicotiana tabacum seeds (Gadotti et al, 2012) that have a smaller dry mass, lower germination rate, and less vigor. For several species, it was found that seeds with these characteristics are more susceptible to attack by Fusarium sp.…”

Section: Resultsmentioning

confidence: 99%

“…and Brachiaria spp. are received in processing plants mixed with earth, sand, stones, straw, and empty spikelets, which are subsequently totally or partially removed to meet commercialization standards, and to allow for the seeds to be easily sowed (Hessel et al, 2012;Quadros et al, 2012;Melo et al, 2016aMelo et al, , 2016b.…”

Section: Introductionmentioning

confidence: 99%

“…Seed conditioning machines clean, sort, and treat (usually only by dyeing the seeds) seeds for improvement Engenharia Agrícola, Jaboticabal, v.39, n.2, p.234-239, mar./apr. 2019 of their physical, physiological, and sanitary quality (Melo et al, 2016a(Melo et al, , 2016bHessel et al, 2012). The steps of this process allow for the removal of undesirable material, which directly affects the physical quality of the seed lot and indirectly affects the sanitary quality and the physiological potential (Hessel et al, 2012;Pereira et al, 2012), However, these steps may also contaminate the seed lots that will later be conditioned, especially when these machines are not cleaned properly.…”

Section: Introductionmentioning

confidence: 99%

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Incidence of Fungi in Mombasa Grass Seeds During the Stages of the Seed Conditioning Process

et al. 2019

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The objective of this study was to evaluate the effect of the seed conditioning process on the sanitary quality of Panicum maximum 'Mombasa' seeds. The seeds were sampled before processing and after exiting the seed blower and sieves (discharge from the top and bottom sieves), first gravity separator (intermediate discharge), seed treatment equipment (dyeing the seeds of the intermediate discharge from the first separator), and second gravity separator (upper, intermediate, and lower discharge). Sanitary analysis was performed by the Blotter Test method with and without surface disinfestation of the seeds, which were incubated at 20 ± 2 °C, with a photoperiod of 12 h, for 7 d. The conditioning process increased the incidence of Fusarium sp. in the Mombasa grass seeds. In addition, Cladosporium sp. and Alternaria sp. were found in and on the surface of the seeds and, therefore, can be disseminated by the seed conditioning machines. The percentage of seeds with Alternaria sp. decreased after dyeing and after the top discharge of the second gravity separator stage.

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“…Mombasa (MELO et al, 2016a), cv. Tanzania (MELO et al, 2016b) and U. brizantha cv. BRS Piata (SILVA et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Production fields and physiological quality of Panicum maximum jacq. cv. mombasa seeds

et al. 2020

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The physiological quality of seeds is influenced by the climatic factors of production fields. The identification of the best conditions of P. maximum cv. Mombasa production fields allows the improvement of the seed sector. The aim of this work was to identify which climatic conditions of production fields can affect the physiological quality of P. maximum cv. Mombasa seeds. Nineteen plots from states of São Paulo (six from municipalities of Auriflama and three from Guzolândia) and Goiás (eight from Quirinópolis and two from Serranópolis), were collected by soil sweeping. The following parameters were evaluated: water content, germination rate, first germination count and germination rate index, seedling emergence in sand and field. Completely randomized design was used for all variables, with the exception of seedling emergence in field, since this variable required block design. Means were compared by the Scott-Knott test, at 5% probability. For the identification of the influence of climatic conditions on the physiological quality of seeds, multivariate statistical analysis was applied through Group and Principal Component Analysis. Production fields of Panicum maximum cv. Mombasa seeds presenting maximum temperatures above 32 ºC at flowering and natural fall stages produce seeds of low physiological quality. Production fields in which precipitation and high temperatures occur during natural fall and harvest of P. maximum cv. Mombasa seeds are not favorable to the production of seeds with high physiological quality.

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Processing in the Quality of Tanzania Grass Seeds

Cited by 8 publications

References 14 publications

Nonlinear modeling proposal for the germination performance of Paspalum regnellii seeds: a species with forage potential in Brazil

Nonlinear modeling proposal for the germination performance of Paspalum regnellii seeds: a species with forage potential in Brazil

Incidence of Fungi in Mombasa Grass Seeds During the Stages of the Seed Conditioning Process

Production fields and physiological quality of Panicum maximum jacq. cv. mombasa seeds

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