Martínez Yordan, Iser Maidelys, Valdivié Manuel, Rosales Manuel, Albarrán Esther, Sánchez David
Agricultural Science and Production Department, Zamorano University, Valle de Yeguare, San Antonio de Oriente, Francisco Morazan, P.O. Box 93, Tegucigalpa 11101, Honduras.
Centro Universitario de Ciencias Biológicas y Agropecuarias (CUCBA), Universidad de Guadalajara, P.O. Box 49, Guadalajara 44214, Jalisco, Mexico.
Animals (Basel). 2022 Apr 27;12(9):1117. doi: 10.3390/ani12091117.
This study evaluated the effect of Agave tequilana (Weber var. azul) stem powder on the growth performance and the intestinal integrity in rabbits. A total of 120 male rabbits [New Zealand × California] were weaned for 35 days and randomized into four dietary treatments, 15 replicates per treatment, and two rabbits per replicate. The treatments consisted of a basal diet (T0) and dietary supplementation with 0.5% (T1), 1.0% (T2) and 1.5% (T3) of Agave tequilana stem powder. The T3 treatment improved the body weight and average daily gain (p < 0.05) compared to the other groups, without affecting viability and feed conversion ratio (p > 0.05). Furthermore, the T3 treatment enhanced (p < 0.05) the thickness of the muscular and mucous layers, and the height, thickness, and number of villi in the duodenum (p < 0.05). However, this treatment (T3) significantly decreased (p < 0.05) values for the area and depth of the crypts in the duodenum and the villus/crypt ratio. Likewise, in the cecum, T3 treatment provoked a marked decrease (p < 0.05) in the depth and thickness of the crypts. The results indicate that the dietary use with 1.5% of A. tequilana stem powder had a natural growth-promoting effect and enhanced the histomorphometry of the concentric layers (muscle and mucosa), villi, and crypts as indicators of intestinal health in rabbits.
本研究评估了龙舌兰（韦伯蓝变种）茎粉对家兔生长性能和肠道完整性的影响。总共120只雄性家兔（新西兰×加利福尼亚品种）断奶35天后，随机分为四种日粮处理组，每组15个重复，每个重复两只家兔。处理组包括基础日粮（T0）以及分别添加0.5%（T1）、1.0%（T2）和1.5%（T3）龙舌兰茎粉的日粮。与其他组相比，T3处理组提高了体重和平均日增重（p<0.05），但不影响存活率和饲料转化率（p>0.05）。此外，T3处理组增加了十二指肠肌层和黏膜层的厚度以及绒毛的高度、厚度和数量（p<0.05）。然而，该处理（T3）显著降低了十二指肠隐窝的面积和深度以及绒毛/隐窝比值（p<0.05）。同样，在盲肠中，T3处理使隐窝深度和厚度显著降低（p<0.05）。结果表明，日粮中使用1.5%的龙舌兰茎粉具有天然的促生长作用，并增强了作为家兔肠道健康指标的同心层（肌肉和黏膜）、绒毛和隐窝的组织形态学特征。
