苎麻替代不同比例苜蓿对波尔山羊生长性能、血清生化指标及养分表观消化率的影响

魏金涛, 郭万正, 杨雪海, 陈芳, 张乃锋, 刁其玉

doi:10.3969/j.issn.1006-267x.2018.10.046

动物营养学报 >

2018 , Vol. 30 >Issue 10: 4202 - 4209

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.10.046

饲料资源开发 Feed Resources Development

苎麻替代不同比例苜蓿对波尔山羊生长性能、血清生化指标及养分表观消化率的影响

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1. 中国农业科学院饲料研究所, 农业部饲料生物技术重点实验室, 北京 100081;
2. 湖北省农业科学院畜牧兽医研究所, 武汉 430064

魏金涛(1981-),男,河南灵宝人,副研究员,博士研究生,从事饲料资源开发与高效利用研究。E-mail:jintao001@163.com

收稿日期: 2018-03-22

网络出版日期: 2018-10-20

基金资助

公益性行业农业科研专项（201403049）；湖北省农业科技创新中心项目（2016-620-000-001-028）

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Effects of Ramie Substituting Different Ratios of Alfalfa on Growth Performance, Serum Biochemical Indexes and Nutrient Apparent Digestibility of Boer Goats

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1. Key Laboratory of Feed Biotechnology of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. Institute of Animal Husbandry and Veterinary Science, Hubei Academy of Agricultural Science, Wuhan 430064, China

Received date: 2018-03-22

Online published: 2018-10-20

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摘要

本试验旨在研究苎麻替代不同比例苜蓿对波尔山羊生长性能、血清生化指标及养分表观消化率的影响。选择体重[（17.51±1.79）kg]相近的3月龄左右波尔山羊羔羊75只，采用单因子试验设计，随机分为5组，每组5个重复，每个重复3只羊。对照组饲喂基础饲粮，4个试验组分别饲喂以苎麻等量替代基础饲粮中25%（试验Ⅰ组）、50%（试验Ⅱ组）、75%（试验Ⅲ组）和100%（试验Ⅳ组）苜蓿的试验饲粮。预试期15 d，正试期75 d。于正试期第60天开始对试验羔羊进行为期4 d的消化代谢试验，收集羔羊粪便，在试验结束当天采集血液样品。结果显示：1）苎麻的粗蛋白质、粗脂肪、钙、中性洗涤纤维、酸性洗涤纤维和粗灰分的含量均高于苜蓿。2）试验Ⅰ组、试验Ⅱ组和试验Ⅲ组山羊的平均日增重与对照组相比分别下降了1.93%、6.16%和20.74%，差异不显著（P>0.05）；试验Ⅳ组山羊的平均日增重与对照组和试验Ⅰ组相比分别降低了27.38%和25.96%，差异显著（P<0.05）。3）与对照组相比，苎麻替代不同比例苜蓿后山羊血清中总蛋白、白蛋白、球蛋白、白球比、肌酐和游离甲状腺素含量均没有产生显著变化（P>0.05）；各个试验组山羊血清中游离三碘甲状原氨酸含量较对照组有不同程度的下降，其中试验Ⅱ组、试验Ⅲ组和试验Ⅳ组与对照组的差异达到显著水平（P<0.05）；在试验Ⅳ组山羊血清中检出了尿酸，对照组和其他试验组山羊血清中均未检出尿酸。4）各个试验组山羊的干物质、粗蛋白质、粗脂肪、中性洗涤纤维、酸性洗涤纤维和总磷表观消化率与对照组相比均没有显著差异（P>0.05），但试验Ⅳ组钙的表观消化率与对照组、试验Ⅰ组、试验Ⅱ组和试验Ⅲ组相比分别降低了11.69%（P<0.05）、11.57%（P<0.05）、11.71%（P<0.05）和7.79%（P>0.05）。综上，苎麻营养价值较高，可以作为优质饲草部分代替苜蓿在波尔山羊饲粮中高效利用。

关键词： 苎麻; 苜蓿; 波尔山羊; 生长性能; 血清生化指标; 养分表观消化率

本文引用格式

魏金涛, 郭万正, 杨雪海, 陈芳, 张乃锋, 刁其玉 . 苎麻替代不同比例苜蓿对波尔山羊生长性能、血清生化指标及养分表观消化率的影响[J]. 动物营养学报, 2018 , 30(10) : 4202 -4209 . DOI: 10.3969/j.issn.1006-267x.2018.10.046

Abstract

The objective of this study was to investigate the effects of ramie substituting different ratios of alfalfa on growth performance, serum biochemical indexes and nutrient apparent digestibility of Boer goats. Seventy-five healthy Boer goat kids aged about 3 months and with a similar initial body weight of (17.51±1.79) kg were randomly assigned to 5 groups with 5 replicates and each replicate had 3 kids. Kids in control group were fed a basal diet, and those in 4 experimental groups were fed experimental diets in which 25% (trial group Ⅰ), 50% (trial group Ⅱ), 75% (trial group Ⅲ) and 100% (trial group Ⅳ) of alfalfa in the basal diet were replaced with ramie, respectively. The pretrial lasted for 15 d, and the trial lasted for 75 d. The results showed as follows:1) the contents of crude protein, ether extract, calcium, neutral detergent fiber (NDF), acid detergent fiber (ADF) and crude ash in ramie were higher than those in alfalfa (P<0.05). 2) Compared with control group, the average daily gain (ADG) of trial groups Ⅰ, Ⅱ and Ⅲ was decreased by 1.93%, 6.16% and 20.74%, respectively, and the differences were not significant (P>0.05). The ADG of trial group Ⅳ was decreased by 27.38% and 25.96% compared with control group and trial group Ⅰ, respectively, and the differences were significant (P<0.05). 3) Serum total protein (TP), albumin (ALB), globulin (GLB), ALB/GLB, creatinine (Gr) and free thyroxine (FT4) contents were not significantly different among all groups (P>0.05). But serum free triiodothyroxine (FT3) content in trial group was reduced at different degrees, and the differences were significant between trial groups Ⅰ, Ⅱ and Ⅲ and control group (P<0.05). Serum uric acid (UA) was detected in trail group Ⅳ, but it was not detected in other groups. 4) The apparent digestibility of day matter, crude protein, ether extract, total phosphorus, NDF and ADF was not significantly different among all groups (P>0.05). But the apparent digestibility of calcium in trail group Ⅳ was lowered 11.69% (P<0.05), 11.57% (P<0.05), 11.71% (P<0.05) and 7.79% (P>0.05) compared with control group, trail groups Ⅰ, Ⅱ and Ⅲ, respectively. Conversely, ramie nutrition value is higher, it can partial replace alfalfa efficient used in Boer goat diets as a high quality forage grass.

Key words： ramie; alfalfa; Boer goats; growth performance; serum biochemical indexes; nutrient apparent digestibility

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