Department of Animal Science and Technology, State University of Montes Claros, Avenue Reinaldo Viana, 2630, Morada do Sol, CEP, Janaúba, Minas Gerais, 39440-000, Brazil.
INCT-Animal Science Member, Brasília, Brazil.
Trop Anim Health Prod. 2021 Mar 17;53(2):209. doi: 10.1007/s11250-021-02660-z.
The objective of this study was to evaluate the use of banana crop wastes in diets of ¾ Holstein × ¼ Zebu heifers on the intake and digestibility of nutrients, microbial protein synthesis, feeding behavior, and animal performance. Eight ¾ Holstein × ¼ Zebu heifers were utilized with an average age of 18 ± 1.0 months and an average body weight (BW) of 298 ± 3.06 kg. The experiment was distributed in two simultaneous 4 × 4 Latin squares. The treatments were as follows: Diet 1 (SS)-sorghum silage as exclusive dietary roughage; diet 2 (SSL)-sorghum silage (50%) associated with 50% leaf hay of banana trees (on a DM basis); diet 3 (SSBP)-sorghum silage (50%) associated with 50% banana peel hay; and diet 4 (SSPS)-sorghum silage (50%) associated with 50% pseudostem hay of banana trees. The roughage:concentrate ratio was 75:25. The greatest dry matter intake (DMI; p < 0.01) was found in heifers that received the SS and SSBP diet, mean of 10.19 kg/day. The SS diet showed greatest dry matter digestibility (DMD; p < 0.01) and crude protein digestibility (CPD; p < 0.01). The concentration of total purines (p < 0.01) and absorbed purines (p < 0.01), microbial protein synthesis (p < 0.01), and microbial efficiency (p < 0.01) was higher in the SSBP diet in comparison with SS and SSL diets. The longest eating time was observed in animals that received the SSL diet, being 17.79% higher (p = 0.01) than the SSBP diet. The final BW (p = 0.39) and BW gain (p = 0.39) were similar, with averages of 319.84 kg and 1.08 kg/day, respectively. Biometric measurements were not altered as a function of bedtime (p > 0.05). Banana wastes can be used to feed ¾ Holstein × ¼ Zebu heifers in partial replacement for sorghum silage as they do not alter the animals' weight gain and body development.
本研究旨在评估在 ¾ 荷斯坦牛 × ¼ 娟姗牛小母牛的饲粮中使用香蕉作物废弃物对养分摄入和消化率、微生物蛋白合成、采食行为和动物生产性能的影响。试验选用 8 头平均年龄为 18 ± 1.0 月龄、平均体重为 298 ± 3.06kg 的 ¾ 荷斯坦牛 × ¼ 娟姗牛小母牛，采用完全随机设计的 2 个 4×4 拉丁方试验。处理如下：饲粮 1（SS）-高粱青贮作为唯一的粗饲料；饲粮 2（SSL）-高粱青贮（50%）与香蕉树叶干草（50%）组合（以干物质为基础）；饲粮 3（SSBP）-高粱青贮（50%）与香蕉皮干草组合；饲粮 4（SSPS）-高粱青贮（50%）与香蕉假茎干草组合。粗料：精料比为 75:25。干物质采食量（DMI；p<0.01）最高的是采食 SS 和 SSBP 饲粮的小母牛，平均每天 10.19kg。SS 饲粮的干物质消化率（DMD；p<0.01）和粗蛋白消化率（CPD；p<0.01）最高。与 SS 和 SSL 饲粮相比，SSBP 饲粮中的总嘌呤（p<0.01）和可吸收嘌呤（p<0.01）、微生物蛋白合成（p<0.01）和微生物效率（p<0.01）更高。采食 SSBP 饲粮的小母牛采食时间最长，比 SSL 饲粮长 17.79%（p=0.01）。最终体重（p=0.39）和日增重（p=0.39）相似，平均体重为 319.84kg，日增重为 1.08kg。生物计量指标不受采食时间的影响（p>0.05）。香蕉废弃物可用于喂养 ¾ 荷斯坦牛 × ¼ 娟姗牛小母牛，可部分替代高粱青贮，而不会改变动物的增重和身体发育。
