1 材料与方法
1.1 试验饲料配方及制作
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 | 试验饲料 Experimental diets | |||
|---|---|---|---|---|
| G1 | G2 | G3 | G4 | |
| 原料 Ingredients | ||||
| 鱼粉 Fish meal | 12.00 | 9.00 | 6.00 | 3.00 |
| 豆粕 Soybean meal | 30.00 | 30.00 | 30.00 | 30.00 |
| 菜籽粕 Rapeseed meal | 4.00 | 4.00 | 4.00 | 4.00 |
| 棉籽粕 Cottonseed meal | 9.00 | 9.00 | 9.00 | 9.00 |
| 花生粕 Peanut meal | 19.00 | 19.00 | 19.00 | 19.00 |
| 鸡肉粉 Chicken meal | 3.00 | 4.00 | 5.00 | 6.00 |
| 鸡蛋粉 Egg meal | 3.00 | 6.00 | 9.00 | |
| 高筋面粉 High gluten flour | 7.00 | 7.00 | 7.00 | 7.00 |
| 瓜尔豆胶 Guar gum | 1.00 | 1.00 | 1.00 | 1.00 |
| 豆油 Soybean oil | 4.00 | 4.00 | 4.00 | 4.00 |
| 大豆卵磷脂 Soybean lecithin | 4.00 | 3.00 | 2.00 | 1.00 |
| L-抗坏血酸-2-磷酸三钠盐 L-ascorbic acid-2-trisodium phosphate | 0.50 | 0.50 | 0.50 | 0.50 |
| DL-α-生育酚醋酸酯 DL-α-tocopherol acetate | 0.10 | 0.10 | 0.10 | 0.10 |
| 维生素预混料 Vitamin premix1) | 2.00 | 2.00 | 2.00 | 2.00 |
| 矿物质预混料 Mineral premix2) | 2.00 | 2.00 | 2.00 | 2.00 |
| 肌醇 Inositol | 0.60 | 0.60 | 0.60 | 0.60 |
| 氯化胆碱 Choline chlorine (95%) | 0.50 | 0.50 | 0.50 | 0.50 |
| 磷酸二氢钙 Ca(H2PO4)2 | 1.00 | 1.00 | 1.00 | 1.00 |
| 甜菜碱 Betaine | 0.30 | 0.30 | 0.30 | 0.30 |
| 合计 Total | 100.00 | 100.00 | 100.00 | 100.00 |
| 营养水平 Nutrient levels3) | ||||
| 水分 Moisture | 8.17 | 7.96 | 7.88 | 8.10 |
| 粗蛋白质 Crude protein | 42.74 | 42.91 | 42.65 | 42.33 |
| 粗脂肪 Crude lipid | 5.92 | 5.91 | 6.02 | 5.98 |
| 粗灰分 Crude ash | 7.63 | 7.55 | 7.51 | 7.50 |
1) 维生素预混料为每千克饲料提供 Vitamin premix provided the following per kg of diets:VA 32 mg,VE 240 mg,泛酸钙 calcium pantothenate 60 mg,VB1 50 mg,烟酸 nicotinic acid 200 mg,VB2 70 mg,VB6 60 mg,VB12 2 mg,VD3 5 mg,VK3 50 mg,生物素 biotin 60 mg,叶酸 folic acid 15 mg。 2) 矿物质预混料为每千克饲料提供 Mineral premix provided the following per kg of diets:CuSO4·5H2O 40 mg,Na2SeO3 20 mg,MnSO4·H2O 30 mg,CoCl2·6H2O 40 mg,ZnSO4·H2O 80 mg,KCl 2 500 mg,FeSO4·H2O 155 mg,MgSO4·7H2O 1 200 mg。 3) 营养水平均为实测值。Nutrient levels were measured values. |
表2 试验饲料氨基酸含量(风干基础)Table 2 Amino acid contents of experimental diets (air-dry basis)% |
| 项目 Items | 试验饲料 Experimental diets | |||
|---|---|---|---|---|
| G1 | G2 | G3 | G4 | |
| 必需氨基酸 Essential amino acids | ||||
| 色氨酸 Tryptophane | 1.07 | 1.08 | 1.08 | 1.09 |
| 组氨酸 Histidine | 1.38 | 1.39 | 1.39 | 1.40 |
| 精氨酸 Arginine | 4.26 | 4.28 | 4.29 | 4.31 |
| 苏氨酸 Threonine | 1.82 | 1.84 | 1.85 | 1.87 |
| 缬氨酸 Valine | 1.91 | 1.94 | 1.97 | 2.00 |
| 蛋氨酸 Methionine | 0.88 | 0.90 | 0.91 | 0.92 |
| 异亮氨酸 Isoleucine | 1.77 | 1.80 | 1.82 | 1.84 |
| 亮氨酸 Leucine | 2.94 | 2.97 | 3.00 | 3.03 |
| 苯丙氨酸 Phenylalanine | 2.12 | 2.15 | 2.18 | 2.21 |
| 赖氨酸 Lysine | 2.87 | 2.87 | 2.87 | 2.86 |
| 非必需氨基酸 Nonessential amino acids | ||||
| 谷氨酸 Glutamic acid | 7.60 | 7.65 | 7.70 | 7.75 |
| 丝氨酸 Serine | 2.23 | 2.30 | 2.37 | 2.43 |
| 天冬氨酸 Aspartic acid | 4.39 | 4.45 | 4.51 | 4.57 |
| 甘氨酸 Glycine | 2.85 | 2.82 | 2.80 | 2.77 |
| 丙氨酸 Alanine | 2.20 | 2.20 | 2.21 | 2.21 |
| 脯氨酸 Proline | 2.00 | 2.01 | 2.01 | 2.01 |
| 酪氨酸 Tyrosine | 0.44 | 0.45 | 0.46 | 0.46 |
| 胱氨酸 Cysteine | 0.71 | 0.73 | 0.75 | 0.77 |
1.2 试验动物及养殖管理
1.3 样品采集
1.4 指标测定
1.4.1 肝胰腺中脂肪代谢产物含量
1.4.2 肠道中胰蛋白酶活性和肝胰腺中抗氧化相关指标
1.4.3 肝胰腺和肌肉中常规营养成分含量
1.5 计算公式
WGR(%)=100×(Wt-Wi)/Wi;
SGR(%/d)=100×(lnWt-lnWi)/t;
SR(%)=100×Nt/Ni;
MF=Nm/Ni;
HSI(%)=100×Wh/Wt。
1.6 统计分析
2 结果
2.1 饲料中鸡肉粉和鸡蛋粉替代不同比例鱼粉对中华绒螯蟹生长相关指标的影响
表3 饲料中鸡肉粉和鸡蛋粉替代不同比例鱼粉对中华绒螯蟹生长相关指标的影响Table 3 Effects of replacing different proportions of fish meal with chicken meal and egg meal on growth-related indexes of Eriocheir sinensis (n=4) |
| 组别 Groups | 初始体重 IBW/g | 终末体重 FBW/g | 增重率 WGR/% | 特定生长率 SGR/(%/d) | 存活率 SR/% | 肝胰腺指数 HSI/% | 蜕壳频率 MF |
|---|---|---|---|---|---|---|---|
| G1 | 9.72±0.20 | 15.13±0.14b | 57.95±0.97b | 0.82±0.01b | 77.50±5.00a | 5.35±0.89 | 1.40±0.22a |
| G2 | 9.44±0.30 | 13.24±0.32a | 40.71±3.86a | 0.61±0.05a | 77.50±5.00a | 5.40±0.70 | 1.48±0.28ab |
| G3 | 9.57±0.22 | 15.26±0.17b | 60.50±2.48b | 0.85±0.03b | 92.50±5.00b | 6.06±0.34 | 1.83±0.17b |
| G4 | 9.53±0.03 | 14.86±0.49b | 56.34±3.39b | 0.80±0.04b | 90.00±8.16b | 5.87±0.34 | 1.48±0.21ab |
同列数据肩标无字母或相同字母表示差异不显著(P>0.05),不同小写字母表示差异显著(P<0.05)。下表同。 | |
Values in the same column with no letter or the same lowercase letter superscripts mean no significant difference (P>0.05), while with the different lowercase letter superscripts mean significant difference (P<0.05). The same as below. |
2.2 饲料中鸡肉粉和鸡蛋粉替代不同比例鱼粉对中华绒螯蟹肝胰腺和肌肉中常规营养成分含量的影响
表4 饲料中鸡肉粉和鸡蛋粉替代不同比例鱼粉对中华绒螯蟹肝胰腺和肌肉中常规营养成分含量的影响Table 4 Effects of replacing different proportions of fish meal with chicken meal and egg meal on proximate nutrient contents in muscle and hepatopancreas of Eriocheir sinensis (n=4)% |
| 项目 Items | 组别 Groups | |||
|---|---|---|---|---|
| G1 | G2 | G3 | G4 | |
| 肌肉 Muscle | ||||
| 水分 Moisture | 14.09±1.15 | 15.98±2.39 | 14.10±2.41 | 14.67±0.51 |
| 粗脂肪 Crude lipid | 2.12±0.22a | 1.94±0.20a | 2.52±0.18b | 1.95±0.16a |
| 粗蛋白质 Crude protein | 67.22±0.81b | 64.65±1.98a | 67.69±1.37b | 65.57±0.14ab |
| 粗灰分 Crude ash | 8.58±1.40b | 7.68±0.94ab | 7.73±0.23ab | 7.11±0.20a |
| 肝胰腺 Hepatopancreas | ||||
| 水分 Moisture | 20.26±2.06c | 16.17±0.68a | 18.25±0.71b | 17.03±1.01ab |
| 粗脂肪 Crude lipid | 35.22±1.13a | 38.45±2.02b | 39.66±0.55bc | 41.81±2.75c |
| 粗蛋白质 Crude protein | 29.34±0.34a | 30.21±1.22a | 32.10±0.38b | 32.78±1.16b |
2.3 饲料中鸡肉粉和鸡蛋粉替代不同比例鱼粉对中华绒螯蟹肝胰腺中脂肪代谢产物含量的影响
表5 饲料中鸡肉粉和鸡蛋粉替代不同比例鱼粉对中华绒螯蟹肝胰腺中脂肪代谢产物含量的影响Table 5 Effects of replacing different proportions of fish meal with chicken meal and egg meal on lipid metabolite contents in hepatopancreas of Eriocheir sinensis (n=4)mmol/L |
| 组别 Groups | 总胆固醇 T-CHOL | 甘油三酯 TG | 高密度脂蛋白胆固醇 HDL-C | 低密度脂蛋白胆固醇 LDL-C |
|---|---|---|---|---|
| G1 | 6.59±0.09 | 10.89±0.27 | 6.94±0.10 | 0.08±0.01 |
| G2 | 6.51±0.11 | 10.00±0.74 | 6.73±0.17 | 0.07±0.02 |
| G3 | 6.45±0.20 | 11.61±1.12 | 6.92±0.09 | 0.07±0.02 |
| G4 | 6.50±0.13 | 11.73±1.62 | 6.71±0.23 | 0.07±0.02 |
2.4 饲料中鸡肉粉和鸡蛋粉替代不同比例鱼粉对中华绒螯蟹肠道中胰蛋白酶活性的影响
图1 饲料中鸡肉粉和鸡蛋粉替代不同比例鱼粉对中华绒螯蟹肠道中胰蛋白酶活性的影响数据柱上方标注相同字母表示差异不显著(P>0.05),不同小写字母表示差异显著(P<0.05)。图2同。 Fig.1 Effects of replacing different proportions of fish meal with chicken meal and egg meal on trypsin activity in intestine of Eriocheir sinensis (n=4) The same letter above the data column indicates that the difference is not significant (P>0.05), while the different lowercase letters above the data column indicates that the difference is significant (P<0.05). The same as Fig.2. |
