| Autor: |
Limón-Hernández D; Departamento de Nutrición Animal, Facultad de Medicina Veterinaria y Zootecnia de la Universidad Autónoma del Estado de México, Toluca, Mexico., Rayas-Amor AA; Departamento de Ciencias de la Alimentación de la Universidad Autónoma Metropolitana Unidad Lerma, Lerma de Villada, Mexico., García-Martínez A; Centro Universitario UAEM Temascaltepec de la Universidad Autónoma del Estado de México, Toluca, Mexico., Estrada-Flores JG; Instituto de Ciencias Agropecuarias y Rurales de la Universidad Autónoma del Estado de México, Toluca, Mexico., López MN; Departamento de Matemáticas, ITAM, Río Hondo 1, 01080, Mexico City, Mexico., Cruz Monterrosa RG; Departamento de Ciencias de la Alimentación de la Universidad Autónoma Metropolitana Unidad Lerma, Lerma de Villada, Mexico., Morales-Almaráz E; Departamento de Nutrición Animal, Facultad de Medicina Veterinaria y Zootecnia de la Universidad Autónoma del Estado de México, Toluca, Mexico. emoralesa@uaemex.mx. |
| Abstrakt: |
The objective of this study was to investigate the effect of four levels of molasses on chemical composition, in vitro digestibility, methane production and fatty acid profile of canola silages. A canola (Brassica napus var. Monty) crop was established in a small-scale agricultural farm and harvested 148 days after sowing. Four levels of molasses were tested with respect to the fresh weight (1.5 kg); these were 1% (CS-1), 2% (CS-2), 3% (CS-3) and 4% (CS-4) molasses, and 0% molasses (CS-0) was included as a control. A total of 45 microsilages were prepared using PVC pipes (4 in. of diameter × 20 cm of length), and the forage was compressed using a manual press. The effects of control and treatments were tested using the general linear model Y = μ + T i + E ij . The linolenic acid (C18:3n3), palmitic acid (C16:0) and linoleic acid methyl ester (C18:2n6c) accounted for 30%, 21% and 10.5% of total fatty acids, respectively; the fermentation parameters and in vitro methane production were not affected (P > 0.05) by treatments; in vitro digestibility decreased significantly (P < 0.05) as the level of molasses increased. It was concluded that CS-4 improved the DM content by 9% and showed high content of linolenic acid methyl ester. The gross energy of canola silages could favour the oleic acid methyl ester. |
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