Lopes Levi Auto, Ferreira Marcelo de Andrade, Batista Ângela Maria Vieira, Maciel Michel do Vale, de Andrade Rodrigo Barbosa, Munhame Joana Albino, Silva Tomás Guilherme Pereira da, Cardoso Daniel Barros, Véras Antonia Sherlânea Chaves, Carvalho Francisco Fernando Ramos de
Animal Science Department, Federal Rural University of Pernambuco, Dom Manoel de Medeiros street, s/n, Dois Irmãos, Recife, Pernambuco, 52171-900, Brazil.
Animal Science Department, Federal University of Amazonas, Macurany street, 1805, Jacareacanga, Parintins, Amazonas, 69152-420, Brazil.
Asian-Australas J Anim Sci. 2020 Aug;33(8):1284-1291. doi: 10.5713/ajas.19.0328. Epub 2019 Aug 23.
To evaluate the effects of the carmine cochineal-resistant spineless cactus genotypes cv. Orelha de Elefante Mexicana (Opuntia) and Miúda (Nopalea) on the intake and digestibility of nutrients, ingestive behavior, performance, and ultrasound measurements of growing lambs.
Thirty-six male (non-castrated) Santa Inês lambs were used, with an average age of 6 months and an initial average weight of 22.0±2.9 kg. They were distributed in a completely randomized design with 3 treatments (Tifton hay, Nopalea and Opuntia) and 12 replications, using initial weight as a covariate. The experimental period was 86 days, with the first 30 days used for the adaptation of the animals to the facilities, diets and management, and the remaining 56 days used for evaluation and data collection.
The intake and apparent digestibility of dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF), total carbohydrates (TC), non-fibrous carbohydrates (NFC), and total digestible nutrients (TDN) showed a significant difference (p<0.05) as a function of the diets, with the Nopalea treatment (p<0.05) increasing DM intake (g/kg and % body weight [BW]), CP, TDN, and TC digestibility, whereas the Tifton hay diet led to a high (p<0.001) neutral detergent fiber corrected for ash and protein (NDFap) g/d intake, NDFap (BW %) and digestibility of said nutrient. There was no effect of treatments (p>0.05) on feeding time, however, rumination time and total chewing time were higher (p<0.05) for animals fed Tifton hay. The performance of the animals was similar (p>0.05). For the ultrasound measurements, Nopalea promoted an increase in the final loin eye area, compared to Tifton hay.
The use of spineless cactus variety Miúda leads to the greater intake and digestibility of nutrients. The evaluated carmine cochineal-resistant spineless cactus genotypes are alternatives for semi-arid regions as they do not negatively affect the performance of growing lambs.
评估抗胭脂虫的无刺仙人掌品种墨西哥大象耳（仙人掌属）和米乌达（仙人果属）对生长羔羊营养物质摄入量、消化率、采食行为、生产性能及超声测量结果的影响。
选用36只6月龄、初始平均体重为22.0±2.9千克的雄性（未阉割）圣伊内斯羔羊。采用完全随机设计，分为3种处理（蒂夫顿干草、仙人果、仙人掌），12次重复，以初始体重作为协变量。试验期为86天，前30天用于让动物适应设施、日粮和管理方式，其余56天用于评估和数据收集。
干物质（DM）、有机物质（OM）、粗蛋白（CP）、中性洗涤纤维（NDF）、总碳水化合物（TC）、非纤维碳水化合物（NFC）和总可消化养分（TDN）的摄入量及表观消化率因日粮不同而存在显著差异（p<0.05），仙人果处理组（p<0.05）使DM摄入量（克/千克和占体重百分比[BW]）、CP、TDN及TC消化率增加，而蒂夫顿干草日粮组的中性洗涤纤维（校正灰分和蛋白质后，NDFap）每日摄入量高（p<0.001）、NDFap（占BW百分比）及该养分消化率高。各处理对采食时间无影响（p>0.05），然而，采食蒂夫顿干草的动物反刍时间和总咀嚼时间更长（p<0.05）。动物的生产性能相似（p>0.05）。在超声测量方面，与蒂夫顿干草相比，仙人果使最终的腰眼面积增加。
使用无刺仙人掌品种米乌达可使营养物质摄入量和消化率更高。所评估的抗胭脂虫无刺仙人掌基因型可作为半干旱地区的替代选择，因为它们不会对生长羔羊的生产性能产生负面影响。
