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Chemical composition, in vitro gas production, methane production and fatty acid profile of canola silage (Brassica napus) with four levels of molasses

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Abstract

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 + Ti + Eij. 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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Funding

The authors express their gratitude to the Universidad Autónoma del Estado de México for the financial support within the project (4372/2017/CI) “Producción in vitro de intermediarios de la biohidrogenación de ácidos grasos insaturados y metano del forraje de canola para la alimentación de ruminates”. This work was carried out within the project “Estrategias de alimentación basadas en forrajes de calidad y su efecto en la composición de ácidos grasos en leche de rumiantes” (UAM-PTC-490, DSA/103.5/14/11131) and within the project “Desarrollo de modelos de optimización para mitigar los gases de efecto invernadero provenientes de las explotaciones ganaderas”, project number 247825, funded by the Consejo Nacional de Ciencia y Tecnología (CONACyT), México. Authors express their gratitude also for the grant provided to Daniel Limón-Hernández by CONACyT.

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Authors and Affiliations

  1. Departamento de Nutrición Animal, Facultad de Medicina Veterinaria y Zootecnia de la Universidad Autónoma del Estado de México, Toluca, Mexico

    Daniel Limón-Hernández & Ernesto Morales-Almaráz

  2. Departamento de Ciencias de la Alimentación de la Universidad Autónoma Metropolitana Unidad Lerma, Lerma de Villada, Mexico

    Adolfo Armando Rayas-Amor & Rosy G. Cruz Monterrosa

  3. Centro Universitario UAEM Temascaltepec de la Universidad Autónoma del Estado de México, Toluca, Mexico

    Anastacio García-Martínez

  4. Instituto de Ciencias Agropecuarias y Rurales de la Universidad Autónoma del Estado de México, Toluca, Mexico

    Julieta Gertrudis Estrada-Flores

  5. Departamento de Matemáticas, ITAM, Río Hondo 1, 01080, Mexico City, Mexico

    Mayra Núñez López

Authors
  1. Daniel Limón-Hernández
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  2. Adolfo Armando Rayas-Amor
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  3. Anastacio García-Martínez
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  4. Julieta Gertrudis Estrada-Flores
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  5. Mayra Núñez López
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  6. Rosy G. Cruz Monterrosa
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  7. Ernesto Morales-Almaráz
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Correspondence to Ernesto Morales-Almaráz.

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Limón-Hernández, D., Rayas-Amor, A.A., García-Martínez, A. et al. Chemical composition, in vitro gas production, methane production and fatty acid profile of canola silage (Brassica napus) with four levels of molasses. Trop Anim Health Prod 51, 1579–1584 (2019). https://doi.org/10.1007/s11250-019-01849-7

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