Lima Talma Jordana, Costa Roberto Germano, de Medeiros Geovergue Rodrigues, de Medeiros Ariosvaldo Nunes, Ribeiro Neila Lidiany, de Oliveira Juliana Silva, Guerra Ricardo Romão, de Carvalho Francisco Fernando Ramos
Federal University of Paraiba, Areia, Paraíba, 58937-000, Brazil.
National Institute of Semi-Arid, Campina Grande, Paraíba, 58937-000, Brazil.
Trop Anim Health Prod. 2019 Feb;51(2):363-368. doi: 10.1007/s11250-018-1697-1. Epub 2018 Aug 30.
The objective of this study was to evaluate the ruminal parameters (pH, N-NH and microbial protein) and morphometry of the rumen and intestine of sheep fed with a diet containing four different levels of the spineless cactus variety, Baiana. The experiment was conducted at the National Semi-Arid Institute in Campina Grande, PB, Brazil. A total of 40 male sheep submitted to the confinement regime were used in a completely randomized design with four treatments (0, 15, 30, and 45% dry matter basis) and ten replicates, with an initial body weight of 23.7 ± 3.08 kg. Experimental diets were composed of ground corn, soybean meal, urea, mineral supplement, limestone, Tifton 85 hay, and spineless cactus of the Baiana variety. The pH, ammonia nitrogen, and microbial protein were evaluated in the ruminal fluid, alongside the morphometric characteristics of the rumen and intestine. While the addition of the spineless cactus did not affect N-NH, it caused a linear reduction in the ruminal pH following 4 h of feeding, and also increased the microbial protein. In addition, it stimulated a reduction in the height of the papillae and the muscle layer of the rumen, and induced the mucosal height in the intestine to increase. The addition of up to 30% of spineless cactus in the diet of sheep without a defined breed did not alter the N-NH, pH, and ruminal histology, but it did increase the production of microbial protein and intestinal mucosa.
本研究的目的是评估饲喂含有四种不同水平无刺仙人掌品种（巴伊亚纳）日粮的绵羊瘤胃参数（pH值、氨态氮和微生物蛋白）以及瘤胃和肠道的形态学特征。试验在巴西帕拉伊巴州坎皮纳格兰德的国家半干旱研究所进行。总共40只实行圈养制度的雄性绵羊采用完全随机设计，分为四种处理（干物质基础分别为0%、15%、30%和45%），每组十个重复，初始体重为23.7±3.08千克。试验日粮由玉米粉、豆粕、尿素、矿物质补充剂、石灰石、蒂夫顿85干草和巴伊亚纳品种的无刺仙人掌组成。对瘤胃液中的pH值、氨态氮和微生物蛋白以及瘤胃和肠道的形态学特征进行了评估。虽然添加无刺仙人掌对氨态氮没有影响，但在喂食4小时后导致瘤胃pH值呈线性下降，同时增加了微生物蛋白。此外，它还促使瘤胃乳头高度和肌肉层降低，并使肠道黏膜高度增加。在无特定品种绵羊的日粮中添加高达30%的无刺仙人掌不会改变氨态氮、pH值和瘤胃组织学，但会增加微生物蛋白的产生和肠道黏膜。
