Effects of nursing frequency and parity on the productive, metabolic and reproductive parameters of beef cows
作者： J. Álvarez-Rodríguez , J. Palacio , A. Sanz
DOI: 10.1016/J.LIVSCI.2010.01.013
关键词:
摘要: Abstract Nursing restriction and parity might be stressful factors influencing the challenging post-partum period. This experiment aimed to evaluate effects of nursing frequency (in multiparous dams) on faecal glucocorticoid metabolites after calving in beef cows (n = 64). Also, role these productive, metabolic reproductive functions was assessed. From day calving, forty-six Parda de Montana were assigned at random three frequencies: once-daily (1 × 30 min 0800 h) (RESTR1), twice-daily (2 × 30 min 0800 1530 h) (RESTR2) ad libitum (ADLIBC). Eighteen heifers maintained with free access their calves as ADLIB cow's group (ADLIBH). Data analysed through analysis variance survival analysis. The during first days not affected by either calf management or (P > 0.10) but they greater 12 h than subsequent samplings (P 0.10). Serum triglycerides urea (P > 0.10). Peripheral cholesterol IGF-I did differ among suckling systems (P > 0.10), mean concentration lower ADLIBC ADLIBH 0.10) had shorter intervals ovulation (P
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