Stability of milk from dual purpose cows with different types of feeding

• Hernández-Bautista Jorge ^[1] ; Rodríguez-Magadán Héctor M. ^[1] ; Salinas-Ríos Teodulo ^[1] ; Pérez-León María I. ^[2] ; Aquino-Cleto Magaly ^[1] ; Mariscal-Méndez Araceli ^[1]
  1. [1] Universidad Autónoma Benito Juárez de Oaxaca

     Universidad Autónoma Benito Juárez de Oaxaca

     México

     
  2. [2] Instituto Tecnológico del Valle de Oaxaca, Tecnológico Nacional de México, Ex Hacienda de Nazareno, Agencia de Policía Nazareno Xoxo, Centro, 71230, Santa Cruz Xoxocotlán, Oaxaca, México.
• Localización: Agro Productividad, ISSN-e 2594-0252, Vol. 15, Nº. 3, 2022 (Ejemplar dedicado a: Marzo), págs. 45-51
• Idioma: inglés
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• Resumen

  • Objective: To establish milk stability using the alcohol test in cows with different feeding strategies in the tropical dairy system.

    Design/methodology/approach: Ten crossbred Holstein Zebu cows whose milk frequently tested positive to the alcohol test were housed in individual yards and distributed into two groups. Experiment 1. T1: cows consumed dry Pangola grass (Digitaria eriantha); T2: cows consumed green Maralfalfa grass (Pennisetum violaceum). Forage was provided ad libitum. Experiment 2. T1 cows were supplemented with a concentrate with higher crude protein and metabolizable energy percentage than T2 cows; this percentage was gradually increased up to 4.0 kg. Milk was subjected to alcohol testing. Variance analyzes were performed under categorical data models.

    Results: Higher percentages of cases that tested positive for alcohol were observed in cows that consumed dry grass than in cows that consumed green grass (P0.05). The concentrate addition to diets based on dry or green forage reduced the positive case percentage.Implications: A balanced diet improves milk stability.

    Findings/conclusions: The improvement in the cows’ nutritional value decreases the percentage of milk with positive results in the alcohol test.