Jaíne Santos Amorim, G. C. Gois, A. F. E. Silva, Milenna Alves dos Santos, Priscila Izidro de Figuêiredo, Juliana Oliveira de Miranda, R. Rodrigues, G. G. Araújo, T. V. Voltolini
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引用次数: 2
摘要
pornuna (Manihot sp.)是全球旱地反刍动物的潜在饲料;然而,对动物饲料的评价是必要的。本研究评估了饲粮中添加pornuna青贮(PS)替代Tifton-85百米草干草(Cynodon spp.)后,羔羊对干物质和营养物质的摄入和消化率、生理反应、摄食行为、水分摄入以及血液生化反应。考虑到饲粮的粗料部分(%干物质- DM),处理分为0%、33%、66%和100% PS。试验设计完全随机化,共6个重复。鲜蚕豆叶片中氰化物酸(HCN)含量分别为207.7 mg kg - 1 DM和76.78 mg kg - 1 DM。随着饲粮中蚕豆含量的增加,蚕豆、粗蛋白质(CP)和中性洗涤纤维(NDFap)的采食量呈线性增加。干物质、NDF和CP的消化率随PS水平的升高而升高,闲置时间线性减少,水分平衡、食物摄水量和粪便总水分随PS水平的升高而增加。氮平衡、生理和血液学反应不受处理的影响,但最终丙氨酸转氨酶均升高。在不改变生理反应、血液学和生化参数的情况下,添加100%粗料部分的PS增加了DM和营养物质的摄入量和消化率,导致通过食物摄入更多的水分。
Nutritional, physiological, hematological, and biochemical responses of lambs fed increasing levels of Pornunça silage
: Pornunça ( Manihot sp.) is a potential forage to feed ruminants in drylands worldwide; however, evaluations of animal diets are necessary. This study assessed intake and digestibility of dry matter and nutrients, physiological responses, ingestive behavior, water intake, as well as hematological and biochemical responses of lambs fed diets containing increasing levels of Pornunça silage (PS) replacing Tifton-85 bermudagrass hay ( Cynodon spp.). Treatments consisted of 0, 33, 66, and 100 % PS considering the roughage portion of the diet (% dry matter – DM). The experimental design was completely randomized with six replicates. Cyanide acid (HCN) levels in fresh Pornunça leaves were 207.7 mg kg −1 DM and 76.78 mg kg −1 DM in PS. Intake of DM and crude protein (CP), and neutral detergent fiber corrected for ash and protein (NDFap) increased linearly with increasing levels of PS in the diet. Digestibility of DM, NDF, and CP were higher with increasing levels of PS. Idle time decreased linearly, while water balance, water intake via food, and total water in feces increased with PS. Nitrogen balance, physiological, and hematological responses were not influenced by treatments, while the final alanine aminotransferase increased for lambs fed all diets evaluated. The PS up to 100 % of the roughage portion increased DM and nutrient intake and digestibility without altering physiological responses and the hematological and biochemical parameters, resulting in greater water intake via food.
期刊介绍:
Scientia Agricola is a journal of the University of São Paulo edited at the Luiz de Queiroz campus in Piracicaba, a city in São Paulo state, southeastern Brazil. Scientia Agricola publishes original articles which contribute to the advancement of the agricultural, environmental and biological sciences.