Dietary supplementation of N-carbamylglutamate and effects on growth, intestinal enzyme activities, immunological and antioxidant abilities of juvenile yellow catfish (Pelteobagrus fulvidraco)
文献类型： 外文期刊
作者： Zhao, Hongxia 1 ; Qiao, Guoxian 1 ; Cao, Junming 1 ; Huang, Yanhua 1 ; Wang, Guoxia 1 ; Chen, Bing 1 ; Chen, Xiaoying; 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Inst Anim Sci, Guangzhou 510640, Guangdong, Peoples R China
2.Guangdong Publ Lab Anim Breeding & Nutr, Guangzhou, Guangdong, Peoples R China
3.Guangdong Key Lab Anim Breeding & Nutr, Guangzhou, Guangdong, Peoples R China
关键词： antioxidant system; growth; immune system; intestinal enzyme activities; N-carbamylglutamate; Pelteobagrus fulvidraco
期刊名称：AQUACULTURE NUTRITION （ 影响因子：3.497； 五年影响因子：3.78 ）
ISSN： 1353-5773
年卷期： 2019 年 25 卷 6 期
页码：
收录情况： SCI
摘要： The effects of N-carbamylglutamate (NCG) on growth, intestinal enzyme activities, immunological and antioxidant parameters were evaluated by a 56-d feeding trial in Pelteobagrus fulvidraco fed diets containing NCG with 0, 250, 500, 1,000 or 2,000 mg/kg, respectively. The results showed that 250 mg/kg of NCG resulted in significantly higher weight gain, intestine fold height, intestine lipase, serum lysozyme, glutathione peroxidase and total antioxidant capacity than control (p < 0.05). However, higher intestine trypsin, arginase, arginine decarboxylase, ornithine decarboxylase, diamine oxidase activities and serum nitric oxide content were observed in 500 mg/kg NCG group compared to control or 2,000 mg/kg (p < 0.05). The survival rate, intestine muscular layer thickness, serum lysozyme and superoxide dismutase activities in 2,000 mg/kg NCG group were significantly lower than those in control and 250 mg/kg group, accompanied by the higher feed conversion ratio in the same group (p < 0.05). Together, dietary NCG level at 250 or 500 mg/kg improved growth, intestinal enzyme activities, immunological and antioxidant abilities, while high NCG level of 2,000 mg/kg had a negative effect. Quadratic regression analysis on weigh growth, diamine oxidase and lysozyme activities indicated that the recommended optimum dietary NCG level was 213.48-314.50 mg/kg of the dry diet.
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