期刊论文

Feed processing and protein requirement of bighead carp

中文

淡水渔业

1000-6907

2019

49

6

75-81

10.13721/j.cnki.dsyy.2019.06.012

本校为第一机构

采用单因素梯度实验设计方法,研究双螺杆挤压膨化加工鳙(Aristichthys nobilis)慢沉性饲料的制作工艺,并通过饲养实验确定鳙幼鱼对饲料蛋白的适宜需求量。结果显示:饲料加工过程中物料的水分含量、脂肪含量和机筒温度对鳙饲料的下沉速度(SV)和糊化度有显著影响。当物料水分含量控制在25%、脂肪含量控制在7% ~ 9%和机筒温度控制在90→115→130 ℃时,鳙饲料具有糊化度高、下沉速度慢的特性,适合鳙的摄食需求。在此工艺基础上,以酪蛋白和白鱼粉为主要蛋白源,制作蛋白质含量分别为20%、25%、30%、35%、40%和45%的6种配合饲料,饲养初始重6.0 g的鳙90 d,以增重率(WG)和特定生长率(SGR)为主要指标,评价...

Single factor gradient experiment design method was adopted to study the twin-screw extruding processing technic on slowly sinking feed processing parameters and the suitable dietary protein requirement of bighead carp(Aristichthys nobilis). The moisture content and lipid content in pellets and extruding barrel temperature had significant effects on the sinking velocity(SV)and gelatinisation of the bighead carp pellets. When the pellets moisture content controlled at 25% and lipid content controlled at 7%-9%,extruding barrel temperature control...