1 材料与方法
1.1 试验设计
1.2 试验饲粮
表1 饲粮组成及营养水平(干物质基础)Table 1 Composition and nutrient levels of diets (DM basis) % |
| 项目 Items | 组别Groups | |||
|---|---|---|---|---|
| Ⅰ | Ⅱ | Ⅲ | Ⅳ | |
| 原料Ingredients | ||||
| 玉米Corn | 15.02 | 26.71 | 29.21 | |
| 豆粕Soybean meal | 6.50 | 0.96 | 5.00 | |
| 菜籽粕Rapeseed meal | 7.00 | |||
| 麸皮Wheat bran | 3.81 | 2.01 | 5.68 | |
| 稻草Rice straw | 45.00 | |||
| 苜蓿Alfalfa | 10.51 | 10.32 | ||
| 玉米秸秆Corn stalk | 83.65 | 69.97 | 50.14 | 1.05 |
| 大豆油Soybean oil | 3.00 | |||
| 磷酸氢钙CaHPO4 | 0.54 | 0.50 | 0.50 | 0.92 |
| 氯化钠NaCl | 0.50 | 0.50 | 0.50 | 0.50 |
| 预混料Premix1) | 5.00 | 5.00 | 5.00 | 5.00 |
| 合计Total | 100.00 | 100.00 | 100.00 | 100.00 |
| 营养水平Nutrient levels2) | ||||
| 消化能DE/(MJ/kg) | 6.69 | 7.29 | 7.97 | 8.82 |
| 粗蛋白质CP | 6.85 | 6.51 | 6.70 | 6.68 |
| 钙Ca | 0.48 | 0.46 | 0.48 | 0.48 |
| 磷P | 0.36 | 0.36 | 0.36 | 0.36 |
1)每千克预混料含有 One kilogram of the premix contained the following:VA 280 000 IU,VD3 30 000 IU,VE 2 400 IU,Cu 0.33 g,Fe 1.75 g,Zn 1.4 mg,Mn 1.4 g,I 15 mg,Se 5 mg,Co 10 mg。 | |
2)消化能和粗蛋白质为实测值,其他为计算值。DE and CP were measured values, while the others were calculated values. |
1.3 饲养管理
1.4 消化代谢试验
1.5 样品采集
1.6 测定指标及方法
1.6.1 平均日增重
1.6.2 常规营养成分
1.6.3 饲粮能量消化代谢指标
1.6.4 能量摄入量
1.7 数据统计分析
2 结果
2.1 饲粮能量水平对空怀期滩羊能量消化代谢的影响
表2 饲粮能量水平对空怀期滩羊能量消化代谢的影响Table 2 Effects of dietary energy level on energy digestion and metabolism of Tan sheep during non-pregnancy period |
| 项目 Items | 组别Groups | |||
|---|---|---|---|---|
| Ⅰ | Ⅱ | Ⅲ | Ⅳ | |
| 总能GE/(MJ/d) | 20.56±1.30b | 20.41±0.28b | 20.60±1.14b | 22.31±0.86a |
| 粪能FE/(MJ/d) | 9.80±1.10a | 8.94±0.28ab | 8.50±0.53b | 8.93±0.66ab |
| 尿能UE/(MJ/d) | 0.48±0.24 | 0.32±0.10 | 0.31±0.21 | 0.25±0.08 |
| 甲烷能ECH4/(MJ/d) | 1.42±0.07Bb | 1.46±0.04ABb | 1.51±0.10ABb | 1.65±0.12Aa |
| 总能消化率DE/GE/% | 52.42±2.72Bb | 56.21±1.61ABab | 58.72±2.09ABa | 59.85±4.54Aa |
| 总能代谢率ME/GE/% | 43.14±1.96Bb | 47.48±1.66ABa | 49.94±2.13Aa | 51.36±4.44Aa |
| 消化能代谢率ME/DE/% | 82.23±2.05b | 84.45±0.97ab | 85.04±1.67a | 85.77±1.11a |
同行数据肩标不同大写字母表示差异极显著(P<0.01),不同小写字母表示差异显著(P<0.05),相同小写字母或无字母表示差异不显著(P>0.05)。 | |
In the same row, values with different capital letter superscripts mean extremely significant difference (P<0.01), and with different small letter superscripts mean significant difference (P<0.05), while with the same small letter or no letter superscripts mean no significant difference (P>0.05). |
2.2 饲粮能量水平对空怀期滩羊能量摄入量和平均日增重的影响
表3 饲粮能量水平对空怀期滩羊能量摄入量和平均日增重的影响Table 3 Effects of dietary energy level on energy intake and average daily gain of Tan sheep during non-pregnancy period |
| 组别 Groups | 干物质采食量 DMI/(g/d) | 能量摄入量Energy intake/(MJ/d) | 初重 Initial weight/ kg | 末重 Final weight/ kg | 平均日增重 ADG/(g/d) | ||
|---|---|---|---|---|---|---|---|
| 总能GE | 消化能DE | 代谢能ME | |||||
| Ⅰ | 1 630.91±53.78a | 20.98±0.69ab | 11.00±0.36Bb | 9.05±0.30Bc | 34.00±1.58 | 36.48±1.70 | 82.67±8.34Cc |
| Ⅱ | 1 518.90±108.78ab | 19.84±1.42b | 11.15±0.80Bb | 9.42±0.68Bbc | 33.67±1.16 | 36.63±0.84 | 98.61±14.19BCb |
| Ⅲ | 1 483.37±87.29b | 20.29±1.19b | 11.91±0.70ABb | 10.13±0.60Bb | 33.94±2.03 | 37.35±2.15 | 113.64±8.13Bb |
| Ⅳ | 1 506.88±53.37ab | 22.05±0.78a | 13.20±0.47Aa | 11.33±0.40Aa | 33.54±0.84 | 37.83±0.98 | 142.95±7.44Aa |
同列数据肩标不同大写字母表示差异极显著(P<0.01),不同小写字母表示差异显著(P<0.05),相同小写字母或无字母表示差异不显著(P>0.05)。 | |
In the same column, values with different capital letter superscripts mean extremely significant difference (P<0.01), and with different small letter superscripts mean significant difference (P<0.05), while with the same small letter or no letter superscripts mean no significant difference (P>0.05). |

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