水生生物学报2011，Vol.35Issue(1)：80-87,8.DOI:10.3724/SP.J.1035.2011.00080
饲料脂肪水平对吉富罗非鱼生产性能、营养物质消化及血液生化指标的影响
EFFECTS OF DIETARY LIPID LEVELS ON GROWTH PERFORMANCE, NUTRIENT DIGESTIBILITY AND BLOOD BIOCHEMICAL INDICES OF GIFT TILAPIA (OREOCHROMIS NILOTICUS)
摘要
Abstract
In order to determine the optimal levels of the lipid of GIFT strain Nile tilapia (Oreochromis niloticus), 630 GIFT with average weight of (2.63±0. 16) g were divided into six groups (1.73％ lipid, 3.71％ lipid, 5.69％ lipid, 7.67％ lipid, 9.64％ lipid and 16.55％ lipid) randomly. One with triplication was the control group fed with basal diet (1.73％ lipid), the others were the treated groups fed with basal diet (1.73％ lipid) supplemented with 2％, 4％, 6％, 8％ and 15％ fish oil, respectively. After rearing 90d, the growth, feed conversion ratio, nutrient apparent digestibility and blood biochemical parameter were determined. Results showed that, along with dietary lipid level raising, weight gain rate and specific growth rate had a trend of going up first then falling down (P＜0.05), protein efficiency ratio improved (P＜0.01) and feed conversion ratio reduced (P＜0.01). Second-order regression of weight gain rate on concentrations of dietary lipid indicated that the optimal dietary lipid for maximal growth of GIFT tilapia was about 9.34％. Crude protein and dry-matter digestibility had no significant effected by dietary lipid levels (P＞0.05). Crude lipid and phosphorus digestibility raised significantly with dietary lipid level increasing (P＜0.05). Albumin and albumin/globulin ratio in 1.73％ group (this group did not added fish oil) was significantly higher than other group (P＜0.05). Along with dietary lipid level raising, cholesterol and alkaline phosphatase of fish serum raised significantly (P＜0.01). Dietary lipid level had significantly influence on blood glucose (P＜0.05), and there was no significantly influence on the content of triglyceride and the activities of glutamic-pyruvic transaminase and glutamic-oxaloacetic transaminase (P＞0.05). It indicated that the level of lipid in the dietary could improve the growth, the apparent digestibilities of crude lipid and phosphorus to some degree, but excessive amount of lipid content in the dietary may be negative effects of fish growth and immune ability in GIFT. So 7.67％-9.34％ lipid of the dietary are the optimal levels of GIFT Seedlings in aquaculture.关键词
吉富罗非鱼/脂肪水平/生产性能/表观消化率/血液生化指标分类
农业科技引用本文复制引用
王爱民,韩光明,封功能,杨文平,郭家豪,王恬,徐跑..饲料脂肪水平对吉富罗非鱼生产性能、营养物质消化及血液生化指标的影响[J].水生生物学报,2011,35(1):80-87,8.基金项目
农业部水生动物遗传育种和养殖生物学重点开放实验室重点开放课题(项目编号:BZ2007-06) （项目编号:BZ2007-06）
江苏省2008年度省高校自然科学基础研究项目(项目编号:08KJD240003) （项目编号:08KJD240003）
江苏省"青蓝工程"优秀青年骨干教师培养基金项目资助 （）
