de Carvalho Vinícius Monteiro, Menezes Olga Cedro de, da Silva E Silva Sarah Nogueira, Pina Douglas Dos Santos, de Carvalho Gleidson Giordano Pinto, Silva Ricardo Diniz Guerra E, de Araújo Maria Leonor Garcia Melo Lopes, Di Mambro Ribeiro Cláudio Vaz, Rotta Polyana Pizzi, Brant Lara Maria Santos, de Freitas Júnior José Esler
Department of Animal Science, Federal University of Bahia, Salvador, BA, Brazil.
Department of Zootechnics, Federal University of Viçosa, Viçosa, MG, Brazil.
Trop Anim Health Prod. 2025 Apr 8;57(3):164. doi: 10.1007/s11250-025-04403-w.
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.
本研究旨在评估瘤胃灌注不饱和脂肪酸对添加（CHI）或不添加（CON）壳聚糖的泽西奶牛消化参数、乳脂肪酸和瘤胃动力学的影响。使用了四头瘤胃插管的经产泽西奶牛（泌乳天数150±45天，日产奶量22.2±4.5千克）。采用交叉设计，有两个17天的实验期，7天适应期和10天数据收集期。期间有5天的洗脱期（缓冲期）。CHI组的奶牛在日粮总干物质中摄入0.2%的壳聚糖或每千克干物质采食量摄入4克壳聚糖。在第17天，灌注300克大豆油以评估壳聚糖对亚油酸生物氢化相互作用的影响。日粮总干物质中添加0.2%的CHI后，干物质采食量、养分消化率、产奶量和组成均未观察到差异。CHI除了使C18:1顺式-11降低（P=0.02）外，并未改变乳脂肪酸谱，C18:1顺式-11随着CHI添加量的增加而降低。日粮对能量平衡、瘤胃特征、瘤胃营养物质流量和瘤胃动力学的任何变量均无影响。在泌乳泽西奶牛日粮中添加壳聚糖不会促进生产和组成的变化。同样，在评估水平下的壳聚糖不会影响瘤胃动力学、瘤胃营养物质流量和能量平衡。
