| 饲料中碳水化合物水平对鲈鱼生长、生理状态参数及体组成的影响 |
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| 作者姓名： | 窦兵帅 梁萌青 郑珂珂 陈壮 王新星 |
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| 作者单位： | [1]上海海洋大学水产与生命学院,201306 [2]青岛市海水鱼类种子工程与生物技术重点实验室中国水产科学研究院黄海水产研究所,266071 |
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| 基金项目： | 公益性行业（农业）科研专项（201003020）资助 |
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| 摘 要： | 以初始体重(34.26±0.37)g的鲈鱼Lateolabrax japonicus为研究对象,进行为期70d的生长实验,探讨饲料中不同的碳水化合物(CHO)水平对其生长、饲料利用、血糖水平和糖酵解酶活力的影响。实验配制6种不同CHO水平(0、6%、12%、18%、24%和30%)的等氮等脂饲料。结果表明,随着饲料中CHO水平的升高,特定生长率(SGR)和饲料效率(FE)均呈现先上升后下降的趋势,都在12%组达到最大值,并显著高于24%和30%组(P0.05),而肝体比(HSI)和脏体比(VSI)呈显著升高的趋势(P0.05),且在30%组达到最大值。饲料中不同CHO水平对鲈鱼成活率、肥满度、肌糖原和己糖激酶(HK)活力均无显著影响(P0.05)。饲料中不同CHO水平显著提高了鲈鱼粗蛋白和粗脂肪含量(P0.05),降低了灰分含量(P0.05)。饲料干物质的表观消化率(ADC)在各组之间差异显著(P0.05),18%组显著高于其余5组(P0.05),12%组饲料蛋白质的ADC显著高于对照组(P0.05)。血清中葡萄糖、甘油三酯、胆固醇含量随着饲料中CHO水平的增加而逐渐上升(P0.05),肝糖原含量先显著升高后趋于平稳(P0.05)。以SGR为评价指标,用二次曲线模型分析得出鲈鱼饲料中CHO的适宜添加量为17.75%。
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| 关 键 词： | 鲈鱼 碳水化合物 生长 血糖 糖原 |
| 收稿时间： | 2013/3/4 0:00:00 |
| 修稿时间： | 2013/3/29 0:00:00 |
Effects of dietary carbohydrate level on growth performance, physiological status and body composition of Japanese seabass Lateolabrax japonicus |
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| Authors: | DOU Bing-shuai ＇ e LIANG Meng-qing ZHENG Ke-ke CHEN Zhuang ＇ WANG Xin-xing |
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| Institution: | 2 ( College of Fisheries and Life Science,Shanghai Ocean University,201306) (z Qingdao Key Laboratory for Marine Fish Breeding and Biotechnology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 266071 ) |
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| Abstract: | Ten-week feeding trial was conducted to evaluate the effects of dietary carbohy- drate level on the growth performance, feed utilization, plasma glucose and glycolytic enzyme activities of Japanese seabass Lateolabrax japonicus. Six isonitrogenous and isolipidic practical diets were formulated to contain graded levels of carbohydrate（CHO） （0, 6 %, 12%, 18%00,24% and 30%）. Specific growth rate （SGR）and feed efficiency（FE） first increased significantly and then decreased with the increasing dietary carbohydrate （P〈0.05）, and they reached the high- est level at the CHO level of 12%, which were significantly higher than those of 24% and 30% groups（P〈0.05）. The hepatopancreas somatic index（HSI） and viscerosomatic index（VSI） in- creased significantly with the increasing dietary carbohydrate contents（P〈0.05）. No signifi- cant differences were observed in survival rate, condition factor（CF）, muscle glycogen and hex- okinase （HK）among different carbohydrate treatments （P〉0.05）. Dietary CHO significantly improved the content of crude protein and crude lipid（P〈0.05）, but significantly reduced the content of ash in the fish（P〈0.05）. The apparent digestibility coefficients （ADC） of dry matter and crude protein in diets reached the highest at the starch level of 18% and 12% respectively, which were significantly greater than those of the control （P〈0.05）. With the increasing dieta- ry carbohydrate, glucose,triglyceride and total cholesterol in serum significantly increased （P〈 0.05）. The liver glycogen increased first and then leveled off with the increasing carbohydrate level（P〈0.05）. On the basis of SGR, the optimum dietary carbohydrate level for the growth of Japanese seabass was 17. 75% ,estimated by second-order polynomial regression analysis. |
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| Keywords: | Japanese seabass Carbohydrate Growth Blood glucose Glycogen |
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