| Registro completo |
| Provedor de dados: |
R. Bras. Zootec.
|
| País: |
Brazil
|
| Título: |
Red clover silage: an alternative for mitigating the impact of nitrogen excretion in ovine production systems
|
| Autores: |
Guzatti,Gabriela Cristina
Duchini,Paulo Gonçalves
Kozloski,Gilberto Vilmar
Niderkorn,Vincent
Ribeiro-Filho,Henrique Mendonça Nunes
|
| Data: |
2019-01-01
|
| Ano: |
2019
|
| Palavras-chave: |
Bioactive compounds
Duodenal flow
Polyphenol-oxidase
Quinones
Urinary nitrogen excretion
|
| Resumo: |
ABSTRACT The objective was to quantify the flow of intestinal nutrients and nitrogen excretion and retention in sheep receiving isoproteic diets. Eight Texel x Lacaune wethers (average body weight = 25±2.5 kg) were fitted with duodenal cannula and housed in metabolic cages. Wethers were assigned to the treatments in a crossover design with two periods of 20 days each, and all feces and urine produced by the wethers were collected. The treatments consisted of two isoproteic (160 g kg−1 of crude protein on dry matter basis) diets composed of red clover (RC) or lucerne (LU; Medicago sativa) silages plus corn silage and concentrate feed. The digestible organic matter and metabolizable energy intake did not differ between treatments. The intestinal non-ammonia N (NAN) flow was 5.9 g day−1 (37%) higher in RC wethers than in those of the LU treatment. This result was a consequence of both an increase in the efficiency of microbial protein synthesis (12.7% higher) and a decrease in ruminal degradable protein (RDP) content (20% lower) of the diet. However, the increase in the intestinal NAN flow was accompanied by a reduction in intestinal digestibility of N, resulting in similar daily N retention between treatments. The reduction of RDP content was probably the main reason for reductions in N urinary excretion in RC wethers compared with those in the LU treatment, showing that RC silage may be a tool for mitigating the impact of N excretion in ovine production systems, without changes in N retention.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100722
|
| Editor: |
Sociedade Brasileira de Zootecnia
|
| Relação: |
10.1590/rbz4820190044
|
| Formato: |
text/html
|
| Fonte: |
Revista Brasileira de Zootecnia v.48 2019
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
