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Studies on the effect of extrusion processing on availavility of trace elements to rainbow trout

挤压加工对虹鳟鱼微量元素利用率影响的研究

基本信息

批准号：
07660266
负责人：
SATOH Shuichi
金额：
$ 1.41万
依托单位：
Tokyo University of Fisheries
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07660266/
关键词：
Extrusion processing Feed Rainbow trout Zinc Manganese Soybean meal 大豆油粕

项目摘要

A series of feeding experiments was conducted to determine the effect of extrusion processing of soybean meal (SBM) on trace element availability in partially replaced fish meal based diet to rainbow trout. SBM was extruded by different conditions such as temperature, and replaced with white fishmeal. The experimental diets were fed to the juvenile rainbow trout for 21 weeks.The growth of the fish fed the diet replaced white fish meal with SBM extruded at 145ﾟC is much higher than that of the fish on the diet included SBM extruded at 100ﾟC.The same trend was obtained in mineral status in fish body.Consequently, the graded levels of high temperature (150ﾟC) extruded SBM (0,30,60%) were replaced with white fishmeal and the graded levels of Zn were supplemented to the 30% extruded SBM included diet. The experimental diets were fed to the juvenile rainbow trout for 12 weeks.The growth reached a plateau by the supplementation with 20 mg Zn/kg among the 30% extruded SBM included diets and Zn content became to the equivalent amount in fish fed the fish meal diet by 40mg Zn/kg. The growth of fish receiving the 60% extruded SBM included diet was lower than the other groups, but the mineral status in fish body was not influenced by dietary treatment.The results of these studies demonstrated that high temperature such as 150ﾟC extrusion cooking influences the quality of SBM very efficiently, and that extruded SBM might be a very suitable material for substitution of fishmeal in terms of trace element.

通过饲喂虹鳟鱼，研究了挤压膨化豆粕对部分替代鱼粉饲料中微量元素有效性的影响。通过改变挤压温度等条件，将SBM挤压成膨化食品，并用白色鱼粉代替。用145 ℃挤压豆粕替代白色鱼粉的试验饲料饲喂虹鳟幼鱼21周后，其生长量明显高于100 ℃挤压豆粕的试验饲料，鱼体中矿物质含量也有相同的变化趋势。因此，高温（150 ℃）挤压豆粕的分级水平用白色鱼粉替代（0、30、60%）的膨化豆粕，并在含30%膨化豆粕的日粮中添加不同水平的锌。试验饲料饲喂虹鳟幼鱼12周后，在30%膨化豆粕饲料中添加20 mg/kg Zn时，生长达到平台期，添加40 mg/kg Zn时，虹鳟幼鱼的Zn含量与鱼粉饲料相当。60%膨化豆粕组的生长速度低于其他组，但对鱼体矿物质含量无明显影响，说明高温膨化处理（150 ℃）对豆粕的品质有显著影响，膨化豆粕是一种非常适合替代鱼粉的微量元素添加剂。