饲料碳水化合物水平对南方鲇生长的影响  

EFFECT OF DIETARY CARBOHYDRATE LEVELS ON GROWTH PERFORMANCE IN SILURUS MERIDIONALIS CHEN

作　　者：付世建[1] 谢小军[2] 

机构地区：[1]中国科学院水生生物研究所,武汉430072 [2]西南师范大学水产科学研究所,重庆400715

出　　处：《水生生物学报》2005年第4期393-398,共6页Acta Hydrobiologica Sinica

基　　金：国家自然科学基金资助项目(编号:30371121)资助

摘　　要：2002年6—8月对南方鲇(SilurusmeridionalisChen)(初始体重12.93±0.13g)进行人工配合饲料的喂养实验。实验以白鱼粉、玉米油、糊化玉米淀粉分别作为蛋白质、脂肪和碳水化合物(CBH)原料。配制等蛋白质(含量为40%),等脂肪(含量为10%),不同CBH梯度的6组饲料,饲料CBH水平分别设计为0%,6%,12%,18%,24%,30%。实验每水平设4个重复,采用室内循环水养殖系统,在27.5℃下以饱足日粮水平喂养8周。实验结果表明:随着饲料淀粉水平的增加,摄食率和生长率呈先增加后降低的趋势;当饲料CBH水平不超过18%时,不会对饲料成分的消化率产生显著影响,但添加量超过18%会降低CBH的消化率。综合实验结果分析:南方鲇生长的最适CBH为12%—18%。From June to August,the growth experiment was conducted in a recirculating rearing system on juvenile of the southern catfish,Silurus meridionalis Chen with initial weight 12.93±0.13g. The white fishmeal,corn oil and gelatinized cornstarch were used as protein,lipid and carbohydrate respectively. Fish were fed with six iso-nitrogenous(40%crude protein)and iso-lipidic(10%crude lipid)experimental diets contain 0(control diet),6,12,18,24 and 30%of carbohydrate level. At each of the diets,4 groups of southern catfish (12 in each group)were fed at ad libitum ration level for 8 weeks at 27.5℃. The digestibility of carbohydrate was not significantly affected when dietary carbohydrate level did not exceed 18%,but decreased when dietary carbohydrate level exceeded 18%. The feeding rate and specific growth rate(SGR)increased with dietary carbohydrate level at a level of dietary carbohydrate not more than 18%,and decreased at a higher level. The feeding rate of 6%and 12%carbohydrate level were significantly higher than those of other levels,and the feeding rate of 30%carbohydrate level was significantly lower than those of other levels. The specific growth rate(SGR)of 6%and 12%carbohydrate level were significantly higher than those of 0,24 and 30%carbohydrate levels,and specific growth rate(SGR)of 30%carbohydrate level was significantly lower than those of 6,12,18 and 24% carbohydrate level. The results suggested the optimal dietary carbohydrate level for growth in this fish was 12%—18%.

关 键 词：南方鲇 配合饲料 碳水化合物 生长率 摄食率 消化率 

分 类 号：S965.128[农业科学—水产养殖] S963.1[农业科学—水产科学]