动物营养学报2016，Vol.28Issue(12)：185-191,7.DOI:10.3969/j.issn.1006-267x.2016.12.023
北方须鳅幼鱼的饲料蛋白质需求量
Dietary Protein Requirement of Barbatula barbatula nuda Juvenile
摘要
Abstract
A 60⁃day feeding trial was conducted to investigate the dietary protein requirement of Barbatula bar⁃batula nuda juvenile. Fish meal, fermented soybean meal and casein were used as the protein sources to formu⁃late 5 isolipidic and isocaloric experimental diets containing different protein levels of 22. 85%, 31. 09%, 40.72%, 47.21% and 54.08%, respectively. Triplicate tanks were assigned to each experimental diet, and 40 fish with initial body weight of (0.77±0.02) g were assigned to each tank (water body volume: 80 cm× 50 cm×20 cm). The result showed as follows: when dietary protein levels were 22.85% to 40.72%, the weight gain rate ( WGR) and special growth rate ( SGR) were significantly increased with the dietary protein level increasing ( P<0.05) , but continued to increase the dietary protein level, the WGR and SGR were signif⁃icantly decreased ( P<0.05) . When dietary protein levels were 22.85% to 40.72%, the feed efficiency ( FE) and survival rate ( SR) showed increase trends with the dietary protein level increasing; when dietary protein levels were 40.72% to 54.08%, the FE and SR showed decrease trends with the dietary protein level increas⁃ing. The WGR, SGR FE and SR of Barbatula barbatula nuda juvenile reached the maximum values when diet⁃ary protein level was 40. 72%. Condition factor ( CF), viscerosomatic index ( VSI), hepatosomatic index ( HSI) and the contents of whole body moisture and crude protein were not significantly affected by dietary protein level ( P>0.05) . The crude lipid content of whole body was significantly decreased when dietary pro⁃tein level was over 40.72% ( P<0.05) , it was decreased with the dietary protein level increased from 31.09%to 54.08%. Base on the quadratic regression equation of WGR and dietary protein level, dietary protein re⁃quirement of Barbatula barbatula nuda juvenile to reach the maximum growth rate is 41.57%.关键词
北方须鳅幼鱼/生长/蛋白质/需求量Key words
Barbatula barbatula nuda juvenile/growth/protein/requirement分类
农业科技引用本文复制引用
韩如政,骆小年,韩雨哲,刘宗英,徐浩然,蒋湘辉..北方须鳅幼鱼的饲料蛋白质需求量[J].动物营养学报,2016,28(12):185-191,7.基金项目
辽宁省自然科学基金项目 （）
