| Registro completo |
| Provedor de dados: |
Ciência Rural
|
| País: |
Brazil
|
| Título: |
Dynamics of change in fermentation and fatty acid profiles in high moisture alfalfa silage during ensiling at different temperatures
|
| Autores: |
Liu,Qinhua
Dong,Zhihao
Shao,Tao
|
| Data: |
2018-01-01
|
| Ano: |
2018
|
| Palavras-chave: |
Silage
Fermentation quality
Fatty acid
Temperature
|
| Resumo: |
ABSTRACT: The objective of present study was to investigate the dynamics of change in fermentation and fatty acid profiles in high moisture (DM=232g/kg FW) alfalfa silages during ensiling at 45°C, 30°C and 15°C. After ensiling for 1, 3, 7, 21, 39 and 65 days, silages was sampled and examined. Lactic fermentation changing into butyric fermentation in silage ensiled at 30°C and 45°C occurred on ensiling for 21 and 65 days, respectively, as accompanied with high ammonia-N content ( >150g/kg N), which subsequently resulted in a sudden increase of pH (P < 0.05). In contrast, the increase of lactic acid content was observed in silage ensiled at 15°C during ensiling for 65 days (P<0.05). As the ensiling temperature rose, considerable losses in total FA, C18:2n6 and C18:3n3 increased after ensiling for 1 day as compared with alfalfa before ensiling (P < 0.05) mainly due to thermolability of polyunsaturated FA and multiplication of lactic acid bacteria. Contents of total FA, C18:2n-6 and C18:3n-3 fluctuated in silage stored at 30°C and 45°C during ensiling from 3 to 65 days (P < 0.05), but decreased at 15°C due to the intervention of aerobic bacteria, yeasts and lipoxygenase. Therefore, after ensiling for 65 days, high moisture alfalfa silage ensiling at 15°C had better fermentation quality than at 30°C and 45°C. Temperature had significant influence on dynamics of change in FA profile in alfalfa silage during ensiling.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000300652
|
| Editor: |
Universidade Federal de Santa Maria
|
| Relação: |
10.1590/0103-8478cr20170605
|
| Formato: |
text/html
|
| Fonte: |
Ciência Rural v.48 n.3 2018
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
|
