Abstract

The aim of this study was to investigate the effect of including marine and freshwater algae in rabbit diets on their performance, digestibility, carcass characteristics, and blood metabolites. One hundred growing male rabbits, aged 30 d and weighing 783.5 ± 2.01 g initial body weight, were randomly assigned to five treatment groups (n = 20 rabbits). Five comparable dietary groups were formulated as follows: the control diet was a basal diet without aquatic plants inclusion, while the diets for the other four treatments included the basal diet plus 4% of marine algae (U. lactuca and P. capillacea) or freshwater algae (S. polyrrhiza and C. aegagropila). Compared with the control group, final body weight, daily weight gain, and feed conversion ratio improved significantly in UL group; followed by those in PC and SP groups (p < .05). Total digestible nutrients and digestible crude protein increased significantly in UL, PC and SP groups. Rabbits in the CA group had lower nitrogen intake, N digested, and N balance decreased than the other groups (p < .05). The UL group had dressing weight and meat protein significant increases, but the SP and CA groups had significant increases in liver, kidney, and spleen weights (p < .05). Including marine and freshwater algae reduced (p < .05) total lipids, total bilirubin, triglycerides, and cholesterol especially in the UL and PC groups, and similarly, HDL and LDL levels were lower in the UL, PC, and SP groups compared to the CA and control groups. In conclusion, the responses in performance, digestibility, and blood metabolites suggest that aquatic plants (with the exception of CA) have the potential to be a sustainable feedstock for growing rabbits' diets.

• Highlights

• Ulva lactuca, Pterocladia capillacea and Spirodela polyrrhiza improve rabbits' performance.

• Marine and freshwater algae inclusion showed no signs of disease.

• Marine and freshwater algae reduced total lipids, triglycerides, and cholesterol.

摘要

这项研究的目的是研究在兔子的日粮中添加海藻和淡水藻对它们的性能，消化率，car体特性和血液代谢产物的影响。将100只成年雄性兔子（30 d）随机分为五个治疗组（n  = 20只），初始体重为783.5±2.01 g 。五个可比较的饮食类别如下：对照饮食是不包含水生植物的基础饮食，而其他四个处理的饮食包括基础饮食和4％的海藻（U. lactuca和P. capillacea）或淡水。藻（S. polyrrhiza和C. aegagropila）。与对照组相比，UL组的最终体重，日增重和饲料转化率有显着改善。其次是PC和SP组（p  <.05）。UL，PC和SP组的总可消化营养素和可消化粗蛋白显着增加。与其他组相比，CA组的兔子的氮摄入量更低，N的消化量和N平衡的降低（p  <.05）。UL组的敷料重量和肉蛋白质显着增加，而SP组和CA组的肝，肾和脾脏重量显着增加（p  <.05）。包括减少的海藻和淡水藻类（p <.05），尤其是在UL和PC组中，总脂质，总胆红素，甘油三酸酯和胆固醇含量较高，并且与CA和对照组相比，UL，PC和SP组中的HDL和LDL水平较低。总之，在性能，消化率和血液代谢产物方面的反应表明，水生植物（CA除外）有潜力成为兔子生长日粮的可持续原料。

• 强调

• Ulva lactuca，Pterocladia capillacea和Spirodela polyrrhiza可以改善兔子的性能。

• 海水和淡水藻类的夹杂物未显示出疾病迹象。

• 海洋和淡水藻类减少了总脂质，甘油三酸酯和胆固醇。