艾凤, 王连生, 李晋南, 王常安, 赵志刚, 罗亮, 都雪, 徐奇友. 低磷饲料中添加α-酮戊二酸对松浦镜鲤生长性能、体成分和血清生化指标的影响[J]. 水生生物学报, 2018, 42(3): 525-532. DOI: 10.7541/2018.066
引用本文: 艾凤, 王连生, 李晋南, 王常安, 赵志刚, 罗亮, 都雪, 徐奇友. 低磷饲料中添加α-酮戊二酸对松浦镜鲤生长性能、体成分和血清生化指标的影响[J]. 水生生物学报, 2018, 42(3): 525-532. DOI: 10.7541/2018.066
AI Feng, WANG Lian-Sheng, LI Jin-Nan, WANG Chang-An, ZHAO Zhi-Gang, LUO Liang, DU Xue, XU Qi-You. EFFECTS OF α-KETOGLUTARATE SUPPLEMENTATION IN LOW-PHOSPHOROUS DIETS ON GROWTH PERFORMANCE, BODY COMPOSITION AND SERUM BIOCHEMICAL INDEXES OF SONGPU MIRROR CARP[J]. ACTA HYDROBIOLOGICA SINICA, 2018, 42(3): 525-532. DOI: 10.7541/2018.066
Citation: AI Feng, WANG Lian-Sheng, LI Jin-Nan, WANG Chang-An, ZHAO Zhi-Gang, LUO Liang, DU Xue, XU Qi-You. EFFECTS OF α-KETOGLUTARATE SUPPLEMENTATION IN LOW-PHOSPHOROUS DIETS ON GROWTH PERFORMANCE, BODY COMPOSITION AND SERUM BIOCHEMICAL INDEXES OF SONGPU MIRROR CARP[J]. ACTA HYDROBIOLOGICA SINICA, 2018, 42(3): 525-532. DOI: 10.7541/2018.066

低磷饲料中添加α-酮戊二酸对松浦镜鲤生长性能、体成分和血清生化指标的影响

EFFECTS OF α-KETOGLUTARATE SUPPLEMENTATION IN LOW-PHOSPHOROUS DIETS ON GROWTH PERFORMANCE, BODY COMPOSITION AND SERUM BIOCHEMICAL INDEXES OF SONGPU MIRROR CARP

  • 摘要: 试验旨在研究低磷饲料中添加α-酮戊二酸(α-ketoglutarate, AKG)对松浦镜鲤(Cyprinus carpio Songpu)生长性能、体成分和血清生化指标的影响。选取平均体重为(6.67±0.14) g的松浦镜鲤630尾, 随机分成7组, 每组3个重复。分别投喂有效磷0.73%的正常磷饲料和有效磷0.47%的低磷饲料, 在低磷饲料中分别添加0、0.4%、0.8%、1.2%、1.6%、2.0% (干物质含量)的AKG, 配制成等氮等能饲料, 试验期为8周。结果表明: 低磷组饲料系数(FCR)显著高于正常磷组(P<0.05), 但增重率(WGR)、特定生长率(SGR)、蛋白质效率(PER)、脏体指数(VSI)及肥满度(CF)差异不显著(P>0.05); 与低磷组比, 0.4%AKG组FCR显著降低(P<0.05), 1.6%AKG组血清磷、白蛋白含量(ALB)显著增加(P<0.05); 0.8%AKG组谷草转氨酶(AST)活性和1.20%AKG组谷丙转氨酶(ALT)活性显著高于正常磷组(P<0.05); 添加不同水平AKG对血清其他指标无显著影响(P>0.05)。与正常磷组相比, 低磷组粗灰分含量、骨钙含量和钙磷沉积率显著降低(P<0.05); 与低磷组相比, 添加不同水平AKG磷沉积率显著增加(P<0.05), 0.4%AKG组, 骨钙含量显著增加(P<0.05), 0.8%AKG组, 骨磷含量显著增加(P<0.05); 低磷饲料添加AKG对其他体成分指标无显著影响(P>0.05)。由此得出, 低磷饲料中添加适量的AKG可以降低FCR, 提高松浦镜鲤脊椎骨钙磷含量。

     

    Abstract: To study the effects of α-ketoglutarate (AKG) supplementation in low-phosphorous diets on growth performance, body composition and serum biochemical indexes of Songpu mirror carp, triplicate groups of Songpu mirror carp (6.67±0.84) g were fed with practical diets containing available P (AP) 0.73% (normal P) and 0.47% (low-P) with graded levels of 0, 0.4%, 0.8%, 1.2%, 1.6% and 2.0% of AKG to satiation for 8 weeks, respectively. The results showed that the feed coefficient (FCR) of the low phosphorus group was significantly higher than that of the normal phosphorus group (P<0.05), but the weight gain rate (WGR), specific growth rate (SGR), protein efficiency (PER), VSI, and CF were similar between normal P and Low-P groups (P<0.05). Compared with low P group,FCR of 0.4% AKG group and the levels of phosphorus and albumin (ALB) in 1.6% AKG group in normal P group were significantly increased (P<0.05), respectively. Compared with normal P group, ALT activity of the 0.8% AKG and AST activity of the 1.6% AKG in the low P group were significantly increased, respectively (P<0.05). AKG had no effect on serum other indexes (P>0.05). Compared with the normal phosphorus group, the content of crude ash and the deposition rate of calcium and phosphorus in the low phosphorus group decreased significantly (P<0.05). Compared with the low phosphorus group, the phosphorus deposition rate and bone calcium content of 0.4% AKG and bone phosphorus content of 0.8% AKG in normal P group increased significantly, respectively (P<0.05). Adding AKG in low phosphorus diet had no significant effect on other body composition indexes (P>0.05). Thus, the suitable supplementation of AKG in the low phosphorus diets can reduce theFCR and improve the content of calcium and phosphorus in bone of Songpu mirror carp.

     

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