Effects of increasing alfalfa (Medicago sativa) leaf levels on the fattening and slaughtering performance of organic broilers.
J Anim Physiol Anim Nutr (Berl)
; 104(5): 1317-1332, 2020 Sep.
Article
en En
| MEDLINE
| ID: mdl-32279385
ABSTRACT
A feeding trial was conducted to evaluate the effects of increasing alfalfa leaf levels on the performance of organic broilers. The impact of drying temperature on the nutritional value of alfalfa leaves and thereby on broiler performance was studied using alfalfa leaves dried at either low (alfalfa leaves low temperature (ALLT)) or high temperatures (alfalfa leaves (AL)). Six hundred male Hubbard JA-757 broilers were divided into five feeding groups (Control (C), AL2, AL3, AL4 and ALLT5). Alfalfa leaf content was increased in each of the three fattening phases by 5% (C 0%-0%-0%; AL2 0%-5%-10%; AL3 5%-10%-15%; AL4 10%-15%-20%; and ALLT5 10%-15%-20%). At the end of the experiment, broilers in group C had the highest body and carcass weights. Groups AL3, AL4 and ALLT5 showed the lowest body and carcass weights. In particular, the early introduction of alfalfa leaves (5% in phase 1) and high alfalfa leaf content (15%-20%) significantly decreased performance. Antinutritional substances such as saponins occur in alfalfa. In fact, the saponin analysis showed high contents of 3-Glc-Glc-28-Ara-Rha-medicagenic acid and HexA-dHex-Pen-Pen-Pen-zanhic acid in both high- and low-temperature alfalfa leaves.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Aumento de Peso
/
Pollos
/
Dieta
/
Medicago sativa
/
Alimentación Animal
Límite:
Animals
Idioma:
En
Revista:
J Anim Physiol Anim Nutr (Berl)
Asunto de la revista:
CIENCIAS DA NUTRICAO
/
FISIOLOGIA
/
MEDICINA VETERINARIA
Año:
2020
Tipo del documento:
Article
País de afiliación:
Alemania