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<p>This study aimed to evaluate the effects of ruminal infusion of unsaturated fatty acids on digestive parameters, milk fatty acids, and ruminal kinetics in Jersey cows supplemented (CHI) or not supplements (CON) with chitosan. Four multiparous Jersey cows cannulated in the rumen were used (DIM 150 ± 45, daily milk production 22.2 ± 4.5 kg). A crossover design was used, with two experimental periods of 17 days, seven days of adaptation, and 10 days of data collection. With a washout (buffer period) of five days between periods. Cows in the CHI group received 0.2% chitosan in the&#xa0;DM total of diet&#xa0;or&#xa0;4g/kg of DMI. On day 17, 300 g of soybean oil were infused to evaluate the effect of chitosan’s interaction on linoleic acid’s biohydrogenation. No differences in dry matter intake and digestibility of nutrients, milk production, and composition were observed with the inclusion of 0.2% of CHI in the&#xa0;DM total of diet. CHI did not alter the fatty acid profile of milk, except for C18:1 <i>cis</i>-11 (<i>P=</i>0.02), which decreased with CHI supplementation. Diets did not influence any variables of energy balance, rumen characterization, omasal flow of nutrients, and rumen kinetics. Including chitosan in diets for lactating Jersey cows did not promote production and composition changes. Likewise, chitosan at the evaluated level does not influence rumen kinetics, omasal flow of nutrients, and energy balance.</p>

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Effects of ruminal infusion of unsaturated fatty acids on digestive parameters, milk fatty acids and ruminal kinetics in Jersey cows supplemented with chitosan

  • 期刊论文

  • 发表日期：

    2025年4月8日

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  • Vinícius Monteiro de Carvalho,
  • Olga Cedro de Menezes,
  • Sarah Nogueira da Silva e Silva,
  • Douglas dos Santos Pina,
  • Gleidson Giordano Pinto de Carvalho,
  • Ricardo Diniz Guerra e Silva,
  • Maria Leonor Garcia Melo Lopes de Araújo,
  • Cláudio Vaz Di Mambro Ribeiro,
  • Polyana Pizzi Rotta,
  • Lara Maria Santos Brant,
  • José Esler de Freitas Júnior

摘要

This study aimed to evaluate the effects of ruminal infusion of unsaturated fatty acids on digestive parameters, milk fatty acids, and ruminal kinetics in Jersey cows supplemented (CHI) or not supplements (CON) with chitosan. Four multiparous Jersey cows cannulated in the rumen were used (DIM 150 ± 45, daily milk production 22.2 ± 4.5 kg). A crossover design was used, with two experimental periods of 17 days, seven days of adaptation, and 10 days of data collection. With a washout (buffer period) of five days between periods. Cows in the CHI group received 0.2% chitosan in the DM total of diet or 4g/kg of DMI. On day 17, 300 g of soybean oil were infused to evaluate the effect of chitosan’s interaction on linoleic acid’s biohydrogenation. No differences in dry matter intake and digestibility of nutrients, milk production, and composition were observed with the inclusion of 0.2% of CHI in the DM total of diet. CHI did not alter the fatty acid profile of milk, except for C18:1 cis-11 (P=0.02), which decreased with CHI supplementation. Diets did not influence any variables of energy balance, rumen characterization, omasal flow of nutrients, and rumen kinetics. Including chitosan in diets for lactating Jersey cows did not promote production and composition changes. Likewise, chitosan at the evaluated level does not influence rumen kinetics, omasal flow of nutrients, and energy balance.