动物营养学报2019，Vol.31Issue(3)：1231-1239,9.DOI:10.3969/j.issn.1006-267x.2019.03.028
饲料蛋白质水平对拉萨裸裂尻鱼幼鱼生长、饲料利用、形体指标和肌肉营养成分的影响
Effects of Dietary Protein Level on Growth, Feed Utilization, Morphology Parameters and Muscle Nutritional Components of Schizopygopsis younghusbandi younghusbandi Regan
摘要
Abstract
This experiment was aimed to investigate the effects of dietary protein level on growth, feed utiliza-tion, morphology parameters and muscle nutritional components of Schizopygopsis younghusbandi younghus-bandi Regan. A total of 540 Schizopygopsis younghusbandi younghusbandi Regan with an initial body weight of (22.42±0.56) g were randomly divided into 6 groups with 3 replicates per group and 30 fish per replicate. Fish in each group were fed experimental groups that the protein levels were 20%, 25%, 30%, 35%, 40% and 45%, respectively. The experiment lasted for 60 days. The results showed as follows: 1) the final weight ( FW) , weight gain rate ( WGR) , specific growth rate ( SGR) , protein efficiency ratio( PER) of Schizopy-gopsis younghusbandi younghusbandi Regan were firstly increased and then decreased with dietary protein level increased, while the feed conversion ratio ( FCR) was firstly decreased and then increased. The FW, WGR, SGR in dietary protein level 35% group were the highest, and significantly higher than those in other groups except dietary protein level 30% group ( P<0.05) . The PER in dietary protein level 30% group was the high-est, and significantly higher than that in other groups except dietary protein level 25% group ( P<0.05). The FCR in dietary protein level 30% group was the lowest, and significantly lower than that in other groups except dietary protein level 35% group ( P<0. 05) . By regression analysis of regression analysis, the WGR, SGR and FCR obtained optimal value when dietary protein levels were 34.01%,34.09% and 35.31%. 2) The viscerasomatic index (VSI), hepaticsomatic index (HSI) and viserosomatic index (VI) of Schizopygopsis younghusbandi young-husbandi Regan were firstly decreased and then increased with dietary protein level increased, and got the minimum values in dietary protein level 35% group. The VSI in dietary protein level 35% group was significantly lower than that in other groups except dietary protein level 40% group (P<0.05), the HSI and VI in dietary protein level 35% group were significantly lower than those in other groups except dietary protein level 30% and 40% groups ( P<0.05). 3) The muscle crude protein content of Schizopygopsis younghusbandi younghusbandi Regan was firstly in-creased and then tended to stabilize with dietary protein level increased, and got the highest in dietary protein level 40% group, and significantly higher than that in dietary protein level 20% and 25% groups (P<0.05); while the muscle ether extract content was firstly decreased and then tended to stabilize, and got the lowest in dietary protein level 35% group, and significantly lower than that in dietary protein level 20%, 25% and 30% groups (P<0.05). In conclusion, properly increasing the dietary protein level can improve the fish growth rate, increase the edible part of the fish, increase the muscle crude protein content, decreased the muscle ether extract content. But too high dietary protein level can decrease the feed utilization rate, increase feed costs Under this experimental conditions, the suitable dietary protein level of Schizopygopsis younghusbandi younghusbandi Regan is 34. 01% to 35. 31%. [Chinese Journal of Animal Nutrition, 2019, 31(3):1231-1239]关键词
拉萨裸裂尻鱼/蛋白质水平/生长/形体指标/肌肉营养成分Key words
Schizopygopsis younghusbandi younghusbandi Regan/protein level/growth/morphology parameters/muscle nutritional components分类
农业科技引用本文复制引用
曾本和,旺久,张忭忭,刘海平,王建,王万良,朱成科,牟振波,王金林,周建设..饲料蛋白质水平对拉萨裸裂尻鱼幼鱼生长、饲料利用、形体指标和肌肉营养成分的影响[J].动物营养学报,2019,31(3):1231-1239,9.基金项目
西藏自治区自然科学基金项目(XZ2017ZRG-47) （XZ2017ZRG-47）
西藏自治区区财政厅农业科技与服务资金项目(2018SFTG01) （2018SFTG01）
西藏自治区科技厅重点研发及转化计划项目(XZ201801NB12) （XZ201801NB12）
西藏自治区地方引智示范推广项目(542108SF03) （542108SF03）
