Detalhes bibliográficos
| Ano de defesa: |
2016 |
| Autor(a) principal: |
COSTA, Francivaldo Oliveira
 |
| Orientador(a): |
RODRIGUES, Rosane Cláudia
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| Banca de defesa: |
Não Informado pela instituição |
| Tipo de documento: |
Dissertação
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| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal do Maranhão
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| Programa de Pós-Graduação: |
PROGRAMA DE PÓS-GRADUAÇÃO EM CIÊNCIA ANIMAL (25.06)/CCAA
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| Departamento: |
Biologia
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| País: |
BR
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| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://tedebc.ufma.br:8080/jspui/handle/tede/568
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Resumo: |
The objective of this study morphogenic characteristics, demographic, productive, nutritious and behavior of grazing sheep in Tanzania grass pasture managed at different heights residue and regrowth ages. The experiment was conducted at the Forage sector of the Center for Agricultural and Environmental Sciences, Federal University of Maranhão, in the municipality of Chapadinha - MA. The experimental design was completely randomized in a factorial arrangement 2x3, two cutting heights (30 and 50 cm) and three regrowth ages (18, 30 and 42 days), a total of six treatments. For production, morfogêneses, demographic and nutritional value used were four replicates (each replicate was characterized by a picket) in relation to grazing behavior were used five replicates (each replicate was characterized by an animal). In morphogenic variables, the residual height had no effect (P>0.05). At the age of 18 days of regrowth, the highest leaf appearance rates were observed (LAR), phyllochron (FIL) and leaf elongation (LER). Regarding the demographic patterns of tillers, there was no effect (P>0.05) the height of waste and interaction between the factors. At the age of 42 days, greater rates of appearance and mortality of tillers were presented, and higher survival rate was observed after 18 days. The highest total dry matter yield (PMST), dried pasta sheet (PMSF) and dry mass stem (PMSC) were observed (P<0.05) in treatment with 30 cm residue and regrowth 42 days. For the chemical composition, the variables of the leaf blade: PB (CP), NDF (neutral detergent fiber), FDA (acid detergent fiber), MS (dry matter) and MM (mineral matter), showed effect (P<0.05) interaction, whereas the stem was no interaction effect only for the CP and MM (P<0.05). The grass handled at 18 days showed higher levels of CP compared to 42 days in both heights and a fraction of the plant. NDF, ADF and LIG were higher after 42 days, and little influenced by waste time, especially in stem fraction. The degradability of dry matter (DMD), at 18 days, the greatest potential and effective degradability values were presented. For grazing behavior, only the variable: time for other activities (OAS), showed no interaction effect (P>0.05). The Tanzania grass managed to 42 days results in high grazing time in both waste heights. The most idle time is observed at the age of 30 days. We conclude that the management of Tanzania grass pasture with different heights residue and regrowth ages influence the production, nutritive value and grazing behavior. Morphogenetic and demographic characteristics are not influenced by waste heights. It is recommended to manage the Tanzania grass maintaining 30 cm residue with 30 days regrowth. |
