不同投喂频率对网箱养殖点带石斑鱼生长、食物利用及氮磷排放的影响  

Effect of feeding frequency on growth,feed utilization and nitrogen and phosphorus waste output of malabar grouper,Epinephelus malabaricus,reared in net pens

作　　者：纪文秀[1] 王岩[1] 厉珀余[1] 

机构地区：[1]浙江大学动物科学学院,浙江杭州310029

出　　处：《浙江大学学报（农业与生命科学版）》2011年第4期432-438,共7页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家自然科学基金资助项目(30771673);浙江省科技厅资助项目(2008C22055)

摘　　要：通过网箱养殖实验研究不同投喂频率对初始体质量为(137±1)g的点带石斑鱼生长,食物利用及饲料氮、磷排放的影响;实验分别按每天4次(4.00 meal·d-1)、每天2次(2.00 meal·d-1)、每天1次(1.00 meal·d-1)、2天1次(0.50 meal·d-1)和4天1次(0.25 meal·d-1)的频率投喂冰鲜杂鱼.结果表明:将投喂频率从0.25 meal·d-1增加到1.00 meal·d-1,鱼摄食率,增质量,饲料系数和饲料氮、磷排放量升高,但饲料氮、磷储积效率下降;将投喂频率从1.00 meal·d-1增加到4.00 meal·d-1,鱼摄食率,增质量,饲料氮、磷储积效率和排放量无显著变化;改变投喂频率对条件系数、肝质量指数和鱼体组成无显著影响;本试验结果显示投喂杂鱼饲养点带石斑鱼适宜的投喂频率为1.00 meal·d-1,在此投喂频率下,经过109 d生长后增质量可达253 g,饲料系数为1.1,饲料氮、磷储积效率分别为22%和24%,每kg鱼产量饲料氮、磷废物排放量分别为108 g和24 g.A net pen experiment was carried out to evaluate the effect of feeding frequency on growth,feed utilization and nitrogen and phosphorus waste output of malabar grouper,Epinephelus malabaricus.In the experiment,fish [initial body mass（137±1） g] were fed raw fish feed at 5 feeding frequencies,including 4 meals per day（4.00 meal·d-1）,2 meals per day（2.00 meal·d-1）,1 meal per day（1.00 meal·d-1）,1 meal every 2 days（0.50 meal·d-1） or 1 meal every 4 days（0.25 meal·d-1）.The results indicated that feed intake（FI）,mass gain,feed conversion ratio（FCR）,nitrogen waste output（TNW） and phosphorus waste output（TPW） increased,while nitrogen retention efficiency（NRE） and phosphorus retention efficiency（PRE） decreased with the increase of feeding frequency from 0.25 meal·d-1 to 1.00 meal·d-1.However,no significant changes were found in FI,mass gain,FCR,NRE,PRE,TNW and TPW,when feeding frequency was further increased from 1.00 meal·d-1 to 4.00 meal·d-1.There were no significant differences in condition factor,hepatosomatic index and whole body composition among fish fed at different feeding frequencies.The results revealed that the suitable feeding frequency for malabar grouper fed raw fish feed should be at 1.00 meal·d-1.Fed at 1.00 meal·d-1 for 109 days,mass gain of malabar grouper was 253 g,and FCR was 1.1,and NRE was 22%,and PRE was 24%,and TNW was 108 g N·kg-1 fish production,and TPW was 24 g P·kg-1 fish production.

关 键 词：点带石斑鱼 投喂频率 增质量 饲料系数 氮、磷废物排放量 

分 类 号：S965.3[农业科学—水产养殖]