Produtividade e valor nutritivo de pastagens de Coastcross-1 em consórcio com diferentes leguminosas de ciclo hibernal

Detalhes bibliográficos
Ano de defesa: 2014
Autor(a) principal: Aguirre, Priscila Flôres
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Santa Maria
BR
Zootecnia
UFSM
Programa de Pós-Graduação em Zootecnia
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.ufsm.br/handle/1/10836
Resumo: The objective of this research was to evaluate three grazing systems with Coastcross-1 (CC) + 100 kg N/ha/year + common vetch; CC + 100 kg N/ha/year + arrowleaf clover; and CC + 200 kg N/ha/year. Lactating Holstein cows were used in the evaluation. The grazing method was the rotative stocking, with one to two days of occupation. Thirteen grazing cycles were performed during the experimental period (354 days). The actual mean value of forage on offer was 5.3% of body weight. The forage mass, botanical composition, leaf/stem ratio; daily accumulation rate, production and forage intake; grazing efficiency, stocking rate and nutritive value were evaluated. Experimental design was completely randomized with three treatments (grazing systems), three replicates (paddocks) in completely split-plot time (grazing/seasons). The average of forage production and stocking rate were 21.0, 20.3 and 24.3 t/ha/year; 7.0, 6.5 e 7.7 animal units/ha/day, respectively. Crude protein, neutral detergent fiber and in situ digestibility of dry matter average values were 18.1, 16.7 and 17.6%; 57.8, 58.9 and 58.7%; 79.6, 78.9 and 80.6%, for the respective systems. High productivity were found on Coastcross-1 mixed with common vetch + 100 kg N/ha/year and Coastcross-1 alone + 200 kg N/ha/year. Better results to nutritive value were found on winter, especially on Coastcross-1 mixed with common vetch.