Avalia??o das propriedades das fibras de algod?es coloridos naturalmente e ecologicamente corretas cultivados nos assentamentos do munic?pio de Guamar?/RN

• Main Author: C?mara, Nailton Torres
• Other Authors: 25094955420
• Language: Portuguese
• Published: Universidade Federal do Rio Grande do Norte 2015
• Subjects: CNPQ::ENGENHARIAS::ENGENHARIA MECANICA; Algod?o colorido; Produtividade; Caracter?sticas t?cnicas; Fibras
• Online Access: http://repositorio.ufrn.br/handle/123456789/19425

Submitted by Automa??o e Estat?stica ([e-mail]) on 2015-12-02T22:57:03Z No. of bitstreams: 1 NailtonTorresCamara_DISSERT.pdf: 1830399 bytes, checksum: ac8609ce4949c38e3aca588bebd879c7 (MD5) === Approved for entry into archive by Arlan Eloi Leite Silva ([e-mail]) on 2015-12-09T19:56:32Z (GMT) No. of bitstreams: 1 NailtonTorresCamara_DISSERT.pdf: 1830399 bytes, checksum: ac8609ce4949c38e3aca588bebd879c7 (MD5) === Made available in DSpace on 2015-12-09T19:56:32Z (GMT). No. of bitstreams: 1 NailtonTorresCamara_DISSERT.pdf: 1830399 bytes, checksum: ac8609ce4949c38e3aca588bebd879c7 (MD5) Previous issue date: 2014-09-19 === Neste trabalho foram avaliadas a produtividade e as caracter?sticas t?cnicas das fibras dos acessos de algod?o colorido existentes no Banco de Germoplasma da EMBRAPA Algod?o. Buscou-se, atrav?s do programa de melhoramento, elevar a resist?ncia, finura, comprimento e a uniformidade das fibras de algod?o, bem como estabilizar a colora??o das fibras nas tonalidades BRS Rubi, BRS Top?zio, BRS Verde e BRS Marrom e elevar a sua produtividade no campo. Primeiramente, foi feita a sele??o individual com teste de prog?nies das sementes, e, posteriormente, o m?todo de hibrida??o seguido de sele??o geneal?gica para se obter varia??es nas tonalidades de cores. As variedades BRS Verde, BRS Rubi, BRS Marrom e BRS Top?zio foram produzidas, analisadas e comparadas com os algod?es existentes na regi?o. As propriedades das fibras foram dimensionadas nos aparelhos Classifiber, NATI, Pressley, Micronaire. As fibras branca e top?zio, foram as que apresentaram maior comprimento 32-34mm e maior resist?ncia 7,94 lb/mg e 7,97 lb/mg respectivamente, al?m de apresentam finura com menor valor de ?ndice micronaire 3,71?g/pol e 3,73 ?g/pol e baixo ?ndice de fibras curtas. Os resultados foram bastantes promissores para utiliza??o dos algod?es geneticamente melhorados ind?stria t?xtil. === In this work evaluate the technical characteristics of the fibers grown in settlements Guamar?, colored cotton seeds were donated existing in the Germplasm Bank of Embrapa Cotton. We sought through the breeding program, raising the resistance, fineness, length and uniformity of cotton fibers, as well as stabilize the staining of fibers in the BRS Topaz, BRS Brown and BRS Green shades and raise their productivity in the field. First, the individual selections to test progeny seeds, and thereafter the hybridization method followed by family selection to obtain variations in the color tones were performed. The BRS Topaz, BRS Brown and BRS Green varieties were produced, analyzed and compared with existing cottons in the region which is the White cotton. The properties amount of impurities and neps, length, length uniformity, short fiber content, fineness and tensile strength of the fibers were sized in Classifiber, NATI, Pressley and Micronaire devices. 10 trials each with 10 tests for all four fiber types were carried out. The White and Topaz fibers showed greater length (32-34mm) and greater resistance (7.94 lb/mg and 7.97 lb/mg respectively) and showed finesse with lower micronaire index 3,71?g/inch and 3, 73?g/inch and a low rate of short fibers. The results were very promising for the use of genetically improved cotton in the manufacturing of fabric and yarn in the textile industry. The fibers were brown colored cotton used in the manufacture of a composite fiber with thermoplastic resin