1 材料与方法
1.1 试验材料
1.2 试验饲料
表1 试验饲料组成及营养水平(风干基础)Table 1 Composition and nutrient levels of experimental diets (air-dry basis) % |
| 项目 Items | 饲料Diets | |||
|---|---|---|---|---|
| G0 | G2 | G4 | G8 | |
| 原料Ingredients | ||||
| 鱼粉Fish meal | 6.00 | 5.60 | 5.20 | 4.40 |
| 发酵黑水虻Fermented black soldier fly | 1.04 | 2.08 | 4.16 | |
| 豆粕Soybean meal | 25.00 | 25.00 | 25.00 | 25.00 |
| 双低菜籽粕Double-low rapeseed meal | 15.00 | 15.00 | 15.00 | 15.00 |
| 鸡肉粉Chicken powder | 5.00 | 5.00 | 5.00 | 5.00 |
| 米糠粕Rice bran meal | 10.00 | 10.00 | 10.00 | 10.00 |
| 高精面粉High-gluten flour | 18.76 | 18.13 | 17.51 | 16.21 |
| 花生粕Peanut meal | 10.00 | 10.00 | 10.00 | 10.00 |
| 豆油Soybean oil | 6.80 | 6.76 | 6.73 | 6.70 |
| L-赖氨酸盐酸盐L-lysine·HCl | 0.09 | 0.11 | 0.12 | 0.15 |
| DL-蛋氨酸DL-methionine | 0.15 | 0.16 | 0.16 | 0.18 |
| 维生素C磷酸酯Vitamin C phosphate | 0.30 | 0.30 | 0.30 | 0.30 |
| 维生素预混料Vitamin premix1) | 0.20 | 0.20 | 0.20 | 0.20 |
| 矿物质预混料Mineral premix2) | 0.50 | 0.50 | 0.50 | 0.50 |
| 磷酸二氢钙Ca(H2PO4)2 | 2.00 | 2.00 | 2.00 | 2.00 |
| 胆碱Choline (50%) | 0.20 | 0.20 | 0.20 | 0.20 |
| 合计Total | 100.00 | 100.00 | 100.00 | 100.00 |
| 营养水平Nutrient levels3) | ||||
| 水分Moisture | 4.12 | 3.74 | 4.73 | 3.24 |
| 粗蛋白质Crude protein | 37.43 | 37.17 | 36.81 | 37.21 |
| 粗脂肪Crude lipid | 9.18 | 9.18 | 9.10 | 9.25 |
| 粗灰分Ash | 8.13 | 8.19 | 8.35 | 8.28 |
1)每千克维生素预混料提供Provided the following per kg of vitamin premix:VA 400 000 IU,VD3 200 000 IU,VE 2 g,L-抗坏血酸-2-磷酸酯 L-ascorbate-2-phosphate 6.5 g,VB1 0.5 g,VB2 1 g,VB5 40 mg,VB6 0.6 g,VB12 2 mg。 2)每千克矿物质预混料提供 Provided the following per kg of mineral premix: Fe (as ferrous sulfate) 2.4 g,Cu (as copper sulfate) 750 mg,Mn (as manganese sulfate) 950 mg,Zn (as zinc sulfate) 4.0 g,Co (as cobalt sulfate) 125 mg。 3)实测值 Measured values。 |
1.3 试验设计与饲养管理
1.4 样品采集
1.5 指标测定
1.5.1 生长性能和形体指标
1.5.2 饲料及全鱼营养成分检测
1.5.3 肝脏生化指标检测
1.5.4 消化酶和Na+-K+-ATP酶活性检测
1.5.5 肝脏免疫指标检测
1.5.6 肠道组织切片制作及测量
1.6 数据统计与分析
2 结果
2.1 生长性能和形体指标
表2 饲料中添加发酵黑水虻对斑点叉尾鮰生长性能和形体指标的影响Table 2 Effects of dietary supplemented with fermented black soldier fly on growth performance (n=3) and body parameters (n=24) of channel catfish |
| 项目 Items | 组别Groups | |||
|---|---|---|---|---|
| G0 | G2 | G4 | G8 | |
| 初均重IBW/g | 2.75±0.01 | 2.75±0.01 | 2.75±0.01 | 2.75±0.01 |
| 末均重FBW/g | 11.46±0.53b | 14.22±0.29a | 13.73±1.24ab | 11.10±0.82b |
| 存活率SR/% | 85.83±3.00ab | 94.17±4.64a | 88.33±2.20ab | 81.67±3.00b |
| 摄食率FR/(g/尾) | 11.13±0.63 | 12.20±0.81 | 11.89±0.56 | 10.36±0.22 |
| 增重率WGR/% | 316.75±19.25b | 417.07±10.28a | 399.18±44.98ab | 303.08±30.01b |
| 特定生长率SGR/(%/d) | 2.04±0.06b | 2.35±0.03a | 2.29±0.13ab | 1.98±0.11b |
| 饲料系数FCR | 1.32±0.03ab | 1.15±0.09ab | 1.12±0.07b | 1.38±0.07a |
| 蛋白质效率PER/% | 202.39±4.12ab | 236.76±17.06ab | 243.79±15.46a | 196.85±11.07b |
| 肥满度CF/(g/cm3) | 1.33±0.16b | 1.46±0.14a | 1.43±0.15a | 1.33±0.12b |
| 脏体比VSI/% | 7.33±1.98a | 7.57±1.20a | 6.94±1.11ab | 6.37±1.40b |
| 肝体比HSI/% | 1.54±0.28a | 1.41±0.22ab | 1.44±0.25ab | 1.38±0.21b |
| 肠体比ISI/% | 1.60±0.49a | 1.52±0.27ab | 1.49±0.28ab | 1.37±0.28b |
同行数据肩标相同或无字母表示差异不显著(P>0.05),不同字母表示差异显著(P<0.05)。下表同。 | |
In the same row, values with the same or no letter superscripts mean no significant difference (P>0.05), while with different letter superscripts mean significant difference (P<0.05). The same as below. |
2.2 体成分
表3 饲料中添加发酵黑水虻对斑点叉尾鮰体成分的影响Table 3 Effects of dietary supplementation of fermented black soldier fly on body composition of channel catfish (n=3) % |
| 项目 Items | 组别Groups | |||
|---|---|---|---|---|
| G0 | G2 | G4 | G8 | |
| 粗蛋白质Crude protein | 13.10±0.36 | 12.53±0.77 | 13.17±0.41 | 14.29±0.86 |
| 粗脂肪Crude lipid | 7.93±0.41 | 7.58±0.67 | 8.21±0.27 | 8.85±0.75 |
| 粗灰分Ash | 3.15±0.09 | 2.92±0.20 | 3.19±0.14 | 3.45±0.32 |
| 水分Moisture | 74.26±0.29 | 76.03±1.88 | 74.53±0.72 | 71.75±2.12 |
2.3 肝脏生化指标
表4 饲料中添加发酵黑水虻对斑点叉尾鮰肝脏生化指标的影响Table 4 Effects of dietary supplemented with fermented black soldier fly on liver biochemical indices of channel catfish (n=3) |
| 项目 Items | 组别Groups | |||
|---|---|---|---|---|
| G0 | G2 | G4 | G8 | |
| 甘油三酯TG/(mmol/g prot) | 0.20±0.02a | 0.12±0.00b | 0.14±0.01b | 0.19±0.01a |
| 总胆固醇TC/(mmol/g prot) | 0.08±0.01a | 0.04±0.00b | 0.04±0.00b | 0.07±0.01a |
| 葡萄糖GLU/(mmol/g prot) | 192.28±4.50 | 182.39±6.22 | 186.71±13.29 | 159.37±19.32 |
| 谷丙转氨酶GPT/(U/g prot) | 23.68±2.14a | 18.50±0.87c | 22.99±0.88ab | 19.15±0.74bc |
| 谷草转氨酶GOT/(U/g prot) | 16.84±1.62a | 11.52±1.27b | 12.78±1.35ab | 10.03±1.48b |
2.4 消化酶和Na+-K+-ATP酶活性
表5 饲料中添加发酵黑水虻对斑点叉尾鮰消化酶和Na+-K+-ATP酶活性的影响Table 5 Effects of dietary supplementation of fermented black soldier fly on digestive enzymes and Na+-K+-ATPase activities of channel catfish (n=3) |
| 项目 Items | 组别Groups | |||
|---|---|---|---|---|
| G0 | G2 | G4 | G8 | |
| 肝脏Liver | ||||
| α淀粉酶AMS/(U/mg prot) | 0.48±0.02a | 0.41±0.04ab | 0.32±0.03b | 0.38±0.02b |
| 胰蛋白酶TRY/(U/mg prot) | 6 451.79±465.18 | 5 323.07±433.16 | 6 035.05±183.49 | 6 299.90±705.46 |
| 脂肪酶LPS/(U/g prot) | 59.86±4.83 | 51.47±2.69 | 51.36±3.65 | 56.93±5.78 |
| 肠道Intestine | ||||
| α淀粉酶AMS/(U/mg prot) | 0.25±0.01ab | 0.29±0.02a | 0.22±0.02b | 0.24±0.03ab |
| 胰蛋白酶TRY/(U/mg prot) | 4 755.80±123.21b | 6 023.21±438.72a | 5 034.27±127.96ab | 5 009.29±411.25ab |
| 脂肪酶LPS/(U/g prot) | 26.21±1.89 | 23.43±0.77 | 26.00±1.46 | 21.65±1.85 |
| Na+-K+-ATP酶Na+-K+-ATPase/(U/mg prot) | 0.85±0.03bc | 1.21±0.05a | 1.00±0.11ab | 0.71±0.01c |
2.5 肠道组织形态
表6 饲料中添加发酵黑水虻对斑点叉尾鮰肠道组织形态的影响Table 6 Effects of dietary supplemented with fermented black soldier fly on intestinal morphology of channel catfish (n=6) |
| 项目 Items | 组别Groups | |||
|---|---|---|---|---|
| G0 | G2 | G4 | G8 | |
| 肌层厚度Muscular thickness/μm | 19.66±1.93b | 40.93±3.02a | 28.92±3.45b | 20.48±1.50b |
| 绒毛长度Villus length/μm | 461.98±27.81b | 652.47±66.52a | 523.41±41.77ab | 510.33±36.08ab |
| 绒毛宽度Villus width/μm | 133.20±4.70ab | 139.97±5.92a | 119.87±2.63ab | 110.91±11.29b |
| 杯状细胞数Goblet cell count/(个/绒毛) | 18.56±0.78bc | 23.61±0.45a | 19.67±0.51b | 17.39±0.81c |
2.6 肝脏免疫指标
表7 饲料中添加发酵黑水虻对斑点叉尾鮰肝脏免疫指标的影响Table 7 Effects of dietary supplemented with fermented black soldier fly on liver immune indices of channel catfish (n=3) |
| 项目 Items | 组别Groups | |||
|---|---|---|---|---|
| G0 | G2 | G4 | G8 | |
| 碱性磷酸酶AKP/(金氏单位/g prot) | 4.68±0.01b | 5.44±0.14a | 5.77±0.09a | 4.69±0.15b |
| 酸性磷酸酶ACP/(金氏单位/g prot) | 8.96±0.29c | 10.90±0.07b | 11.48±0.13a | 8.80±0.10c |
| 溶菌酶LZM/(μg/g prot) | 54.19±3.44 | 52.15±9.75 | 51.32±4.28 | 53.58±3.07 |
| 补体3 C3/(mg/g prot) | 0.86±0.02b | 1.08±0.04a | 0.96±0.03b | 0.90±0.04b |

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