Oliveira Roberto Matheus, Pereira Filho José Morais, Inô Claudiney, Andrade Évyla, Lucena Kevily Henrique, Oliveira Juliana Paula, Pereira Elzania, Oliveira Ronaldo, Edvan Ricardo, Bezerra Leilson
Graduate Program in Animal Science and Health, Federal University of Campina Grande, Patos 58708110, Brazil.
Campus do Sertão, Federal University of Sergipe, Nova Esperança, Nossa Senhora da Glória 49680000, Brazil.
Vet Sci. 2025 Jan 1;12(1):14. doi: 10.3390/vetsci12010014.
The use of escape protein, which is absorbed in the small intestine, can improve the production of ruminant animals because it meets their protein requirements better. This study hypothesized that wax lipid matrices are effective encapsulants for escape lysine in ruminants and tested tannin extract as an adjuvant. Forty intact male Santa Ines × Dorper sheep (~4 months old, BW 23 ± 1.2 kg) were allocated, in a randomized block design, to four treatments: control group (no lysine addition), supplementation with free lysine, escape lysine, and escape lysine + tannin extract. The ether extract intake was higher in the sheep fed escape lysine + tannin compared to the control and free lysine group. The sheep fed escape lysine presented higher DM and aNDF eating efficiency ( ≤ 0.05) compared to the free lysine and control groups. Escape lysine with and without tannin presented greater TDN compared to free lysine and control. The NFCs were lower in the free lysine diet, and the crude protein digestibility was higher in the sheep fed lysine + tannin and the control group compared to the escape and free lysine groups. The lysine treatments did not affect ( > 0.05) the performance, ingestive behavior, and blood parameters. The rectal temperature was higher in the sheep fed lysine escape compared to those fed free lysine. The sheep fed escape lysine + tannin exhibited reduced ( ≤ 0.05) large particles and improved peNDF 12 h after feeding. The escape lysine diet, regardless of the addition of tannin, improved the total digestible nutrients and eating efficiency, without affecting the performance, feed conversion, and blood variables of the sheep.
在小肠中被吸收的逃逸蛋白的使用可以提高反刍动物的产量，因为它能更好地满足它们的蛋白质需求。本研究假设蜡质脂质基质是反刍动物中逃逸赖氨酸的有效包囊剂，并测试了单宁提取物作为佐剂。采用随机区组设计，将40只完整的雄性圣伊内斯×杜泊绵羊（约4月龄，体重23±1.2 kg）分为四个处理组：对照组（不添加赖氨酸）、补充游离赖氨酸组、补充逃逸赖氨酸组和补充逃逸赖氨酸+单宁提取物组。与对照组和游离赖氨酸组相比，饲喂逃逸赖氨酸+单宁的绵羊乙醚提取物摄入量更高。与游离赖氨酸组和对照组相比，饲喂逃逸赖氨酸的绵羊表现出更高的干物质和酸性洗涤纤维进食效率（≤0.05）。与游离赖氨酸组和对照组相比，添加和不添加单宁的逃逸赖氨酸组的总可消化养分更高。游离赖氨酸日粮中的非纤维碳水化合物含量较低，与逃逸赖氨酸组和游离赖氨酸组相比，饲喂赖氨酸+单宁组和对照组的绵羊粗蛋白消化率更高。赖氨酸处理对性能、采食行为和血液参数没有影响（>0.05）。与饲喂游离赖氨酸的绵羊相比，饲喂逃逸赖氨酸的绵羊直肠温度更高。饲喂逃逸赖氨酸+单宁的绵羊在采食12小时后大颗粒减少（≤0.05），有效中性洗涤纤维得到改善。无论是否添加单宁，逃逸赖氨酸日粮都提高了总可消化养分和进食效率，而不影响绵羊的性能、饲料转化率和血液变量。
