无花果和番石榴叶粉混合物中的缩合单宁对羔羊营养代谢、甲烷排放和生产性能的影响。
Effect of condensed tannins from Ficus infectoria and Psidium guajava leaf meal mixture on nutrient metabolism, methane emission and performance of lambs.
作者信息
Pathak A K, Dutta Narayan, Pattanaik A K, Chaturvedi V B, Sharma K
机构信息
Faculty of Veterinary Science & Animal Husbandry, SKUAST-Jammu, R. S. Pura, Jammu 181102, India.
Centre of Advanced Faculty Training in Animal Nutrition, Indian Veterinary Research Institute, Izatnagar-243122, India.
出版信息
Asian-Australas J Anim Sci. 2017 Dec;30(12):1702-1710. doi: 10.5713/ajas.17.0060. Epub 2017 Jun 27.
OBJECTIVE
The study examined the effect of condensed tannins (CT) containing Ficus infectoria and Psidium guajava leaf meal mixture (LMM) supplementation on nutrient metabolism, methane emission and performance of lambs.
METHODS
Twenty four lambs of ~6 months age (average body weight 10.1±0.60 kg) were randomly divided into 4 dietary treatments (CT-0, CT-1, CT-1.5, and CT-2 containing 0, 1.0, 1.5, and 2.0 percent CT through LMM, respectively) consisting of 6 lambs each in a completely randomized design. All the lambs were offered a basal diet of wheat straw ad libitum, oat hay (100 g/d) along with required amount of concentrate mixture to meet their nutrient requirements for a period of 6 months. After 3 months of experimental feeding, a metabolism trial of 6 days duration was conducted on all 24 lambs to determine nutrient digestibility and nitrogen balance. Urinary excretion of purine derivatives and microbial protein synthesis were determined using high performance liquid chromatography. Respiration chamber study was started at the mid of 5th month of experimental feeding trial. Whole energy balance trials were conducted on individual lamb one after the other, in an open circuit respiration calorimeter.
RESULTS
Intake of dry matter and organic matter (g/d) was significantly (p<0.05) higher in CT-1.5 than control. Digestibility of various nutrients did not differ irrespective of treatments. Nitrogen retention and microbial nitrogen synthesis (g/d) was significantly (p<0.01) higher in CT-1.5 and CT-2 groups relative to CT-0. Total body weight gain (kg) and average daily gain (g) were significantly (linear, p<0.01) higher in CT-1.5 followed by CT-1 and CT-0, respectively. Feed conversion ratio (FCR) by lambs was significantly (linear, p<0.01) better in CT-1.5 followed by CT-2 and CT-0, respectively. Total wool yield (g; g/d) was linearly (p<0.05) higher for CT-1.5 than CT-0. Methane emission was linearly decreased (p<0.05) in CT groups and reduction was highest (p<0.01) in CT-2 followed by CT-1.5 and CT-1. Methane energy (kcal/d) was linearly decreased (p<0.05) in CT groups.
CONCLUSION
The CT supplementation at 1% to 2% of the diet through Ficus infectoria and Psidium guajava LMM significantly improved nitrogen metabolism, growth performance, wool yield, FCR and reduced methane emission by lambs.
目的
本研究探讨了添加含凝聚单宁（CT）的榕树和番石榴叶粉混合物（LMM）对羔羊营养代谢、甲烷排放和生产性能的影响。
方法
将24只约6月龄（平均体重10.1±0.60千克）的羔羊随机分为4种日粮处理组（CT-0、CT-1、CT-1.5和CT-2，分别通过LMM含有0%、1.0%、1.5%和2.0%的CT），每组6只，采用完全随机设计。所有羔羊自由采食小麦秸秆基础日粮，每天饲喂100克燕麦干草，并补充所需量的精料混合物，以满足其6个月的营养需求。试验饲喂3个月后，对所有24只羔羊进行为期6天的代谢试验，以测定营养物质消化率和氮平衡。使用高效液相色谱法测定嘌呤衍生物的尿排泄量和微生物蛋白质合成。呼吸室研究在试验饲喂期第5个月中旬开始。在开路呼吸热量计中，对每只羔羊依次进行全能量平衡试验。
结果
CT-1.5组的干物质和有机物质摄入量（克/天）显著高于对照组（p<0.05）。无论处理如何，各种营养物质的消化率没有差异。CT-1.5组和CT-2组的氮保留量和微生物氮合成量（克/天）显著高于CT-0组（p<0.01）。CT-1.5组的总体重增加量（千克）和平均日增重（克）显著最高（线性，p<0.01），其次是CT-1组和CT-0组。羔羊的饲料转化率（FCR）在CT-1.5组显著最佳（线性，p<0.01），其次是CT-2组和CT-0组。CT-1.5组的总羊毛产量（克；克/天）比CT-0组线性更高（p<0.05）。CT组的甲烷排放量呈线性下降（p<0.05），CT-2组的下降幅度最大（p<0.01），其次是CT-1.5组和CT-1组。CT组的甲烷能量（千卡/天）呈线性下降（p<0.05）。
结论
通过榕树和番石榴LMM在日粮中添加1%至2%的CT可显著改善羔羊的氮代谢、生长性能、羊毛产量、FCR，并减少甲烷排放。
Zotero 插件