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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Impactos em sementes de feijão Vigna causados pelas operações na unidade de beneficiamento e seus efeitos sobre a viabilidade. / Impacts on Vigna bean seeds caused by operations in the beneficiation unit and their effects on viability.

FIGUEIRÊDO NETO, Acácio. 05 July 2018 (has links)
Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-07-05T14:54:04Z No. of bitstreams: 1 ACÁCIO FIQUEIRÊDO NETO - DISSERTAÇÃO PPGEA 2003..pdf: 4578217 bytes, checksum: 9dbfdf653e3c7c4bbe60a1bba3c2f1ff (MD5) / Made available in DSpace on 2018-07-05T14:54:04Z (GMT). No. of bitstreams: 1 ACÁCIO FIQUEIRÊDO NETO - DISSERTAÇÃO PPGEA 2003..pdf: 4578217 bytes, checksum: 9dbfdf653e3c7c4bbe60a1bba3c2f1ff (MD5) Previous issue date: 2003-07 / No processamento de sementes, logo após a colheita e debulha, estas são encaminhadas a Usina de Beneficiamento de Sementes (UBS), onde através de elevadores são conduzidas às máquinas de pré-limpeza, limpeza, separação e classificação, tratamento, embalagem e transporte para o armazenamento. O presente trabalho foi desenvolvido para investigar os impactos mecânicos sofridos pelas sementes de duas variedades de feijão vigna (Cedinha e Rabo de Tatu) com dois teores de umidade (13,5% e 7,3% b.u.) ao passarem pelas operações impostas depois da colheita, debulha e pela UBS e suas consequências no decorrer do armazenamento. Foram utilizadas as sementes com pureza acima de 95%, as quais foram submetidas às operações da UBS. Ao longo do sistema de operação foram coletadas amostras para analisar e verificar os danos devidos aos impactos mecânicos. As amostras de trabalho foram logo submetidas aos testes de germinação e aos diferentes testes de vigor. E, em seguida, outras amostras foram armazenadas nas condições ambientais de Alagoinha - PB, e nas condições controladas de câmara seca em Campina Grande - PB. As sementes com a umidade 7,3% da variedade Rabo de Tatu são mais susceptíveis a quebra ocasionada pelos impactos durante o processo de beneficiamento; as sementes das duas variedades estudadas, demonstraram ante o tempo de armazenamento, os impactos sofridos e os teores de umidade iniciais, tendências e um mesmo comportamento, embora quantitativamente diferentes e que os impactos sofridos pelas sementes na UBS durante o seu beneficiamento não exerceram efeitos imediatos sobre a germinação e o vigor das sementes. O teste de vigor que melhor correlacionou com o teste padrão de germinação (TPG) foi o índice de velocidade de emergência (IVE), com um coeficiente de correlação acima de 97%, podendo ser empregado na avaliação do vigor dessas sementes. / In the processing of seeds, soon after the crop and it thrashes, these are directed tha Plant of Improvement of Seeds, where through elevators the machines of before-cleaning, cleaning, separation and classification, treatment, packing and storage are led. This work was developed to investigate the mechanical impacts suffered by the seeds of two varieties of bean vigna (Cedinha and Rabo of Tatu) with two moisture contents (13,5% and 7,3% w.b.) to the they go by the operations imposed after the crop and it thrashes and your consequences in elapsing of the storage. The seeds were used with purity above 95%, so that it could submit them the operations of Plant of Improvement of Seeds. In each operation place samples were collected to analyze and to veriíy the damages happened through the impacts. The work samples were soon submitted to the germination tests and the different vigor tests. And, soon after, other samples were stored in the environmental conditions of Alagoinha - PB, and in the controlled conditions of camera it evaporates in Campina Grande - PB. The seeds with the humidity 7,3% of the variety Rabo de Tatu are more fragile the break caused by the impacts during the improvement process; the seeds of the two studied varieties, demonstrated in the face of the time of storage, the suffered impacts and the initial humidity tenors, tendencies and a same behavior, although with different amounts although with different amounts and that the suffered impacts for the seeds during your improvement didn't exercise immediate effects on the germination and the vigor of the seeds. The vigor test that best correlated with the standard test of germination it was the index of emergency speed, with a correlation coefficient above 97%, could be used in the evaluation of the vigor of those seeds.

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