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| 冬季不同饲养密度对湖羊育成公羊生长发育和舍内CO2、NH3浓度的影响 | |
| 引用本文： | 邓先德,宋魁,付秀珍,吴荷群,高永维,张子荣,马长宾,姚守秀,陈文武,赵欢,秦汉明.冬季不同饲养密度对湖羊育成公羊生长发育和舍内CO2、NH3浓度的影响[J].中国畜牧兽医,2017,44(10):2923-2930. |
| 作者姓名： | 邓先德 宋魁 付秀珍 吴荷群 高永维 张子荣 马长宾 姚守秀 陈文武 赵欢 秦汉明 |
| 作者单位： | 1. 农业部规划设计研究院畜牧工程研究所, 北京 100125; 2. 农业部农业设施结构工程重点实验室, 北京 100125; 3. 第六师五家渠市畜牧兽医工作站, 五家渠 831300; 4. 新疆农业大学动物科学学院, 新疆 830052 |
| 基金项目： | 新疆生产建设兵团重大科技项目（2013AA003-2）；第六师重大科技专项（Z1304） |
| 摘 要： | 试验旨在研究冬季不同舍饲密度对育成公羊生长性能、屠宰性能、内脏器官发育和饲养环境的影响，采用单因素完全随机区组设计，将144只6月龄、体重相近的健康育成公羊随机分为4组，即Ⅰ、Ⅱ、Ⅲ和Ⅳ组，每组6个重复，每个重复6只羊。每组饲养密度分别为0.70、1.05、1.40和1.75 m2/只，试验期55 d。结果显示：①Ⅱ组平均日增重和末重均极显著高于其他组（P < 0.01），Ⅲ、Ⅳ组极显著高于Ⅰ组（P < 0.01），Ⅱ组体增重最高，分别比Ⅰ、Ⅲ和Ⅳ组高20.27%、11.98%和10.23%（P < 0.01），Ⅱ组料重比极显著低于Ⅰ、Ⅲ和Ⅳ组（P < 0.01）；②Ⅱ组宰前活重极显著高于其他组（P < 0.01），净肉重、净肉率和肉骨比均显著高于Ⅰ组（P < 0.05），而Ⅱ、Ⅲ、Ⅳ组间无显著差异（P > 0.05）；③各组间除心脏和脾脏重有显著差异外，其余各器官重均未表现出显著差异（P>0.05），Ⅳ组心脏和肝脏重占活体重量比最高；④舍内的NH3和CO2平均浓度大小为：Ⅰ组 > Ⅱ组 > Ⅲ组 > Ⅳ组，与羊饲喂空间大小呈负相关（R2=－0.995和R2=－0.999）；⑤在不计算人工和饲料成本的情况下，Ⅰ、Ⅱ、Ⅲ和Ⅳ组分别获利6 345.67、7971.77、6977.80和7 025.42元，Ⅱ组经济效益最高。综上所述，试验Ⅱ组各项指标均优于其他3组，舍饲育肥羊饲养密度与生长性能的物理性拐点是1.05 m2/只。 |
| 关 键 词： | 湖羊育成公羊 饲养密度 生长性能 屠宰性能 NH3浓度 CO2浓度 |
| 收稿时间： | 2017-04-11 |
Effects of Different Stocking Density on Growth and Development and CO2,NH3 Concentration of Hu Rams in Winter |
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| DENG Xian-de,SONG Kui,FU Xiu-zhen,WU He-qun,GAO Yong-wei,ZHANG Zi-rong,MA Chang-bin,YAO Shou-xiu,CHEN Wen-wu,ZHAO Huan,QIN Han-ming.Effects of Different Stocking Density on Growth and Development and CO2,NH3 Concentration of Hu Rams in Winter[J].China Animal Husbandry & Veterinary Medicine,2017,44(10):2923-2930. | |
| Authors: | DENG Xian-de SONG Kui FU Xiu-zhen WU He-qun GAO Yong-wei ZHANG Zi-rong MA Chang-bin YAO Shou-xiu CHEN Wen-wu ZHAO Huan QIN Han-ming |
| Institution: | 1. Chinese Academy of Agricultural Engineering, Beijing 100125, China; 2. Planning Design and Research Institute of the Ministry of Agriculture, Beijing 100125, China; 3. Animal Husbandry and Veterinary Station, The Six Division of Xinjiang Regiment, Wujiaqu 831300, China; 4. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China |
| Abstract: | The experiment was conducted to study the effects of different stocking density on growth performance,slaughter performance,organs development and feeding environment of Hu rams in winter.144 healthy and 6 months old Hu rams with similar body weight were randomly divided into 4 groups (groups Ⅰ,Ⅱ,Ⅲ and Ⅳ) with 6 reduplicates per group and 6 sheep per reduplicate. Each sheep in each group covers an area of 0.70,1.05,1.40 and 1.75 m2,respectively,and the experiment period was 55 d. The results showed that:①The final body weight and average daily gain of group Ⅱ were extremely significantly higher than other groups (P < 0.01), that of groups Ⅲ and Ⅳ extremely significantly higher than group Ⅰ (P < 0.01).The body weight gain of group Ⅱ was the highest which were 20.27%,11.98% and 10.23% higher than groups Ⅰ,Ⅲ and Ⅳ,while the F/G of group Ⅱ was extremely significantly lower than other groups (P < 0.01).②The live weight of group Ⅱ was extremely significantly higher than other groups (P < 0.01),and the net meat weight,net meat percentage and ratio of meat to bone were significant higher than group Ⅰ (P < 0.05).③There was no significant difference of organ development among groups (P > 0.05),except heart and spleen,and the ratio of heart and liver weight to live weight of group Ⅳ were the highest.④The variations of NH3 and CO2 concentration during the day and night was basically same in the house. The rank of NH3 and CO2 concentration in all groups were group Ⅰ > group Ⅱ > group Ⅲ > group Ⅳ,which had a negative correlation with the size of sheep fed space (R2=-0.995 and R2=-0.999).⑤The profits of groups Ⅰ,Ⅱ,Ⅲ and Ⅳ were 6 345.67,7971.77,6977.80 and 7 025.42 yuan,respectively,in which groupⅡ was the highest. In conclusion,the group Ⅱ had the better effects than the other three groups, Therefore,the physical inflection point of stall-feeding density and growth performance of sheep stocking was 1.05 m2/a. |
| Keywords: | Hu growth ram stocking density growth performance slaughter performance NH3 concentration CO2 concentration |
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