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Previous issue date: 2016-02-18 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Objetivou-se avaliar as caracter?sticas estruturais e o desempenho animal em pastos de capim-massai manejado com dois n?veis de intercepta??o de luz e duas alturas de p?s-pastejo, sob lota??o intermitente. Os tratamentos avaliados foram: 90/15; 95/15; 90/25; 95/25. Os animais foram manejados pelo m?todo de pastejo intermitente, com taxa de lota??o vari?vel. O in?cio do per?odo de ocupa??o dos piquetes foi determinado pelo n?vel de intercepta??o de luz pelo dossel, e o final pela altura p?s-pastejo. Foram avaliadas a massa de forragem total no pr? e p?s-pastejo, as porcentagens de participa??o dos constituintes morfol?gicos, as taxas de ac?mulo de forragem, o consumo total de mat?ria seca, o ganho de peso vivo m?dio di?rio e o ganho de peso vivo total. O comportamento ingestivo dos ovinos foi avaliado em intervalos de cinco minutos, determinando-se o tempo despendido em pastejo, rumina??o, ?cio (minuto) e taxa de bocado (bocado/minuto). N?o houve diferen?as significativas para o per?odo de ocupa??o dos piquetes com m?dia de 11 dias. Os pastos manejados com as combina??es 90/15, 90/25 e 95/25 apresentaram maiores porcentagens de folhas no pr?-pastejo. N?o houve diferen?a entre tratamentos e ciclos de pastejo para o ac?mulo e taxa de ac?mulo de forragem com m?dias de e 6344,9 kg/ha e 116,4 kg/ha.dia respectivamente. Houve efeito de ciclo para o peso final dos ovinos. Houve efeito das combina??es de frequ?ncias e intensidades de pastejo para o ganho m?dio di?rio, os maiores ganhos foram observados nos animais mantidos nos pastos com 90/15, 90/25 e 95/25 (137, 153 e 154 g dia-1, respectivamente). A taxa de lota??o n?o diferiu entre os manejos com m?dia de 49.7 cabe?as (30kg) ha-1. Houve efeito de comportamento dos ovinos para tempo de pastejo, rumina??o, ?cio e taxa de bocados. O manejo do pastejo do capim-massai para ovinos em sistema intermitente que promove melhor desempenho animal e maior efici?ncia de utiliza??o da forragem est? associado ao n?vel de intercepta??o de luz e altura de p?s-pastejo de 90/15, 90/25 e 95/25. / The objective of this study was to evaluate the structural characteristics and the animal performance on capim-massai grass pastures under two light interception levels and two post-grazing canopy heights under intermittent stocking. Treatments were: 90/15; 95/15; 90/25 and 95/25. Intermittent grazing method and variable stocking rate were used to manage the grazing animals. The animals start grazing the paddocks was determined by the canopy?s light interception level and the end of grazing by the post-grazing canopy height. Total forage mass before and post-grazing, percentages of morphological plant constituents, forage accumulation rates, total dry matter intake, average daily live weight gain and total live weight gain were evaluated. The ingestive behavior of the sheep was evaluated at five minutes intervals to measure the time spent in grazing, ruminating, idling (minute) and bite rate (bites / minute). There was no significant difference for rotation period of paddocks with 11 days in average. The pastures managed with the 90/15, 90/25 and 95/25 combinations showed higher leaf percentages in pre-grazing. There was no difference between treatments and grazing cycles for total and rate of forage accumulation with averages of 6,344.9 kg / ha and 116.4 kg / ha.day, respectively. There was a grazing cycle effect for the final weight of the sheep. There were effects of frequency combinations and grazing intensities for the average daily gain, the highest gains were observed in the animals grazing pastures with 90/15, 90/25 and 95/25 (137, 153 and 154 g day -1, respectively). The stocking rate did not differ between treatments with a mean of 49.7 head (30kg/head) ha -1. There was an effect of sheep behavior for grazing time, rumination, idling and bite rates. The grazing management of capim-massai for sheep on an intermittent stocking systems that promotes better animal performance and greater efficiency of forage utilization is associated to light interception level and post-grazing canopy height of 90/15, 90/25 and 95/25.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/24076 |
| Date | 18 February 2016 |
| Creators | Souza, Joelma da Silva |
| Contributors | 71588590020, Montagner, Denise Baptaglin, 92717004068, Emerenciano Neto, Jo?o Virginio, 05498851456, Costa, Marcone Geraldo, Difante, Gelson dos Santos |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM PRODU??O ANIMAL, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| 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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