Effects of processing method and dietary lysine levels on growth performance, feed conversion ratio and body composition of grass carp, Ctenopharyngodon idella
文献类型: 外文期刊
作者: Gan, Lian 1 ; Liu, Yong-Jian 2 ; Tian, Li-Xia 2 ; Yue, Yi-Rong 3 ; Liu, Fu-Jia 2 ; Yang, Hui-Jun 2 ; Chen, Yong-Jun 2 ; L 1 ;
作者机构: 1.South China Agr Univ, Anim Sci Coll, Guangzhou, Guangdong, Peoples R China
2.Sun Yat Sen Univ, Sch Life Sci, Guangzhou, Guangdong, Peoples R China
3.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Minist Agr, Key Lab Freshwater Fisheries & Germplasm Resource, Wuxi, Peoples R China
关键词: grass carp;Ctenopharyngodon idella;lysine;processing method extruded pellets
期刊名称:ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH ( 影响因子:0.287; 五年影响因子:0.593 )
ISSN: 0792-156X
年卷期: 2015 年 67 卷
页码:
收录情况: SCI
摘要: Effects of feed processing method and lysine level on the growth performance of grass carp were evaluated in this study. 13 g kg-1, 15 g kg-1 and 17 g kg-1 lysine level of diet were prepared through (a) extrusion and (b) cold pelleting process, supplemented with crystalline lysine (L-lysine HCL). After 8 weeks of feeding experiment, the results showed that the feed processing method had no effect on growth and on the feed conversion rate of grass carps. Weight gain, protein and amino acids retention, feed efficiency of grass carp fed with the extruded and pelleted feeds were significantly improved by with lysine supplementation (P < 0.05). Viscerasomatic index (VSI), hepatopancreasomatic index (HSI), intraperitoneal fat ratio (IPF), muscle fat content, whole body fat content, serum high density lipoprotein and low density lipoprotein of fish were significantly increased when fed extruded diets (P < 0.05). This result suggests that extrusion can affect fat metabolism. VSI, HIS IPF, muscle fat content and whole body fat content of grass carp were significantly reduced with supplemented crystalline lysine (P < 0.05). Lower serum Aspartate aminotransferase activity and glutamate dehydrogenase activity were observed when fish were fed with extruded diets (P < 0.05).
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