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Previous issue date: 2013-05-17 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The objective of this scientific work was to evaluate the tillering and mass production of Brachiaria brizantha Piat? and Marandu grasses with two statures of post-grazing. The experimental lineation was in factorial arrangement (2 pastures x 2 residue stature) with subplots (grazing cycle). The experimental period was from March to October of 2012. The target stature on pre-grazing was 50 cm and on post-grazing 15 and 25 for each cultivar. The following variables were analyzed: tiller population density, forage mass, morphological components, accumulation and accumulation rate. Three grazing cycles were obtained. Marandu grass presented larger forage mass on pre-grazing and lower stem production than piat? grass. No difference was observed between the two cultivars regarding the leaf blade production. There was no difference on forage mass, leaf blade, stem, and dead material production between the two statures of post-grazing. The pastures managed at 25 cm presented accumulation rate compared to those with 15 cm. Concerning the accumulation rate on the two cultivars, piat? and marandu grasses, Marandu grass presented higher amount than the piat? grass, and also presented higher values on the rate of basal tiller appearing on 15 cm stature post-pasture feature. Piat? grass managed at 25 cm developed smaller tiller amount on the second generation and greater tiller amount on the third generation than marandu grass. The greater tiller population density was observed on 25cm post-grazing pastures. There was no statistical difference of density between the two cultivars and between the cycles. Accordingly, it is concluded that piat? and marandu cultivars can be managed with 15cm and 25 cm post-grazing statures / O objetivo deste trabalho foi avaliar o perfilhamento e produ??o de massa dos capins Brachiaria brizantha cv. Piat? e cv. Marandu com duas alturas de p?s-pastejo. O delineamento experimental foi em arranjo fatorial (2 gram?neas x 2 alturas de res?duo) com subparcelas (ciclo de pastejo). O per?odo experimental foi de mar?o a outubro de 2012. A meta de altura no pr?-pastejo foi de 50 cm e no p?s-pastejo 15 e 25 cm, para cada cultivar. Foram analisadas as seguintes vari?veis: densidade populacional de perfilhos, massa de forragem, componentes morfol?gicos, ac?mulo e taxa de ac?mulo. Foram obtidos tr?s ciclos de pastejo. O capim-marandu apresentou uma maior massa de forragem no pr?-pastejo e uma menor produ??o de colmo em rela??o ao capim-piat?. N?o foi observada diferen?a entre as duas cultivares quanto ? produ??o de l?mina foliar. N?o houve diferen?a na produ??o de massa de forragem, l?mina foliar, colmo e material morto entre as duas alturas de p?s-pastejo. Ao avaliar as taxas de ac?mulos nas duas cultivares, o capim-marandu apresentou valores superiores em rela??o ao capim-piat?, sendo superior tamb?m para a caracter?stica taxa de aparecimento de perfilhos basilares na altura de 15 cm p?s-pastejo. O capim-piat? manejado a 25 cm desenvolveu uma menor quantidade de perfilhos na segunda gera??o, que ocorreu entre os meses de maio e junho, e uma maior quantidade de perfilhos na terceira gera??o, que ocorreu no m?s de agosto, em rela??o ao capim-marandu. A maior densidade populacional de perfilhos foi observada nos pastos com 25 cm de p?s-pastejo. N?o houve diferen?a estat?stica no n?mero de perfilhos entre as duas cultivares e entre os ciclos. Sendo assim, conclui-se que as cultivares Piat? e Marandu, podem ser manejadas com as alturas de p?s-pastejo de 15 cm e 25 cm
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17190 |
| Date | 17 May 2013 |
| Creators | Lima, Carla Lailane Dias de |
| Contributors | CPF:71588590020, http://lattes.cnpq.br/0253635901049492, Aguiar, Emerson Moreira de, CPF:10633049468, http://lattes.cnpq.br/3844922335813780, Montagner, Denise Baptaglin, CPF:92717004068, http://lattes.cnpq.br/4505594312712884, Basso, Kelen Cristina, CPF:09766478856, http://lattes.cnpq.br/5657334255595330, Difante, Gelson dos Santos |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Produ??o Animal, UFRN, BR, Sistemas de Produ??o Sustent?veis no Semi-?rido; Caracteriza??o, conserva??o e melhoramento gen?tico |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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