CN114027424B - 条纹锯鮨幼鱼循环水养殖专用膨化饲料及其制备方法和应用 - Google Patents
条纹锯鮨幼鱼循环水养殖专用膨化饲料及其制备方法和应用 Download PDFInfo
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- CN114027424B CN114027424B CN202111557707.9A CN202111557707A CN114027424B CN 114027424 B CN114027424 B CN 114027424B CN 202111557707 A CN202111557707 A CN 202111557707A CN 114027424 B CN114027424 B CN 114027424B
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- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
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- A01K61/10—Culture of aquatic animals of fish
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- A—HUMAN NECESSITIES
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- A23K10/22—Animal feeding-stuffs from material of animal origin from fish
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- Fodder In General (AREA)
Abstract
本发明公开了一种条纹锯鮨幼鱼循环水养殖专用膨化饲料,以质量计,所述循环水养殖专用膨化饲料蛋白质含量为54%,脂肪含量为16%,蛋脂比为3.375:1。本发明还公开了其制备方法和应用。本发明条纹锯鮨幼鱼循环水养殖专用膨化饲料含54%蛋白质和16%脂肪,蛋脂比为3.375:1,饲喂的条纹锯鮨幼鱼在工厂化循环水养殖条件下有最佳的生长表现。
Description
技术领域
本发明涉及鱼类膨化饲料技术领域,具体涉及一种条纹锯鮨幼鱼循环水养殖专用膨化饲料及其制备方法和应用。
背景技术
条纹锯鮨,学名Centropristis striata,又称美洲黑石斑,在分类学上隶属于鲈形目(Perciformes)>鲈亚目(Porcoidei)>鮨科(Serranidae)>锯鮨属(Centropristis)>条纹锯鮨(Centropristis striata)。条纹锯鮨是一种名贵的海水鱼类,主要分布于美国和墨西哥东海岸即大西洋沿岸,具有生长速度快、适应能力强、出肉率高、营养丰富等诸多优良品质。有研究者对其营养成分进行过分析并对其营养价值做出了评价,佐证了条纹锯鮨是一种营养价值和经济价值都较高的且具有广阔市场前景的优良养殖品种。
条纹锯鮨属于广温、广盐、暖温性鱼类,其生存温度为5~31℃,最适的生长温度为17~25℃;其生存盐度为10~35,最适的生长盐度为23~33。条纹锯鮨的耗氧率较低,能耐3.0mg/L的低氧条件,因此可以密养。条纹锯鮨为肉食性鱼类,较为凶猛,养殖初始,由于环境的改变,较为胆怯,不会马上摄食,需经一定时间耐心驯化。在人工养殖条件下,它的生长速度要比自然环境下快许多倍;饲养的黑石斑能够很快适应干性颗粒饲料的摄食;在封闭式或开放式养殖***中的养殖效果都很好。
2002年条纹锯鮨引入我国山东省,2006年驯化并人工繁育成功。曾在我国福建地区养殖较多,其他地区数量很少,但因销路一般而慢慢淡出市场。近年来因其在刺身行业的出色表现,深受广大消费者青睐,因此养殖规模得到扩大。随着条纹锯鮨规模化养殖在我国福建、广东、山东、舟山等地区的兴起,迫切需要提供能满足其生长需要的优质配合饲料,而目前国内对条纹锯鮨的研究主要集中在资源调查,生态学,生理学,人工育苗和养殖技术等方面,对其营养需求方面的研究报道较少,因此本发明对其配合饲料中的蛋白水平、脂肪水平及蛋脂比进行一系列的研究,以获得其生长所需的最优饲料蛋脂比。
蛋白质和脂肪是鱼类正常生长发育所需的重要物质基础,其中蛋白质是决定鱼类生长最关键的营养物质,对鱼类的生长发育有显著影响。在畜牧生产上,常选用高精料高蛋白饲料进行强度育肥,因为含较高蛋白营养水平,其饲料转化率优于低蛋白饲料,而水产动物对蛋白质的需求远高于畜禽动物。当饲料中蛋白质含量不足,无法满足其正常生长发育的营养需求,将导致鱼类生长速度的下降和饲料利用效率的降低,甚至会降低其机体的抗病能力,对不利环境的适应耐受能力和抗应激能力也会下降;而饲料中蛋白质含量过高时,不但会使水产养殖成本增加,而且鱼类会因摄入过量的蛋白质而产生过多的氨氮***物,会在一定程度上加重养殖水体的污染,增加病害的发生,同时还会造成蛋白资源的浪费。
非蛋白能源已被证明可用于减少蛋白质作为能量被消耗并增加用于生长的蛋白质的利用,这一过程被称为“蛋白质节约”。然而,在水产饲料中使用非蛋白能源必须进行评估,因为水产饲料中添加过多的非蛋白能源有以下几个缺点:(1)减少饲料摄入量;(2)鱼体脂肪含量过高;(3)抑制其他营养素的利用。饲料中蛋白质和脂肪的含量以及比例不仅关系到鱼类养殖的经济效益,还涉及到生态环境问题。因此,在设计水产饲料配方时,除了满足其营养需求,还应该考虑到最佳的饲料蛋脂比。
发明内容
本发明的目的是提供一种条纹锯鮨幼鱼循环水养殖专用膨化饲料及其制备方法和应用,以解决现有技术的不足。
本发明采用以下技术方案:
本发明第一方面提供了一种条纹锯鮨幼鱼循环水养殖专用膨化饲料,以质量计,所述循环水养殖专用膨化饲料蛋白质含量为54%,脂肪含量为16%,蛋脂比为3.375:1。
进一步地,所述循环水养殖专用膨化饲料包括秘鲁鱼粉、脱脂南极磷虾粉、豆粕、小麦淀粉、谷朊粉、豆奶宝、鱼油、大豆油、预混料、氯化胆碱、L-赖氨酸和DL-蛋氨酸,其中预混料由维生素预混料和矿物预混料组成。
本发明第二方面提供了一种条纹锯鮨幼鱼循环水养殖专用膨化饲料的制备方法,包括如下步骤:
步骤1、将秘鲁鱼粉、脱脂南极磷虾粉和豆粕分别粉碎后100目过筛;
步骤2、按配方量称取秘鲁鱼粉、脱脂南极磷虾粉、豆粕、小麦淀粉、谷朊粉和豆奶宝在双轴搅拌机中充分混匀,再按配方量称取预混料、氯化胆碱、L-赖氨酸和DL-蛋氨酸混合均匀后加入到双轴搅拌机中充分混匀,之后以秘鲁鱼粉、脱脂南极磷虾粉、豆粕、小麦淀粉、谷朊粉、豆奶宝、预混料、氯化胆碱、L-赖氨酸和DL-蛋氨酸总质量计,缓缓加入45%-50%的水并进一步混匀,得到湿料,常温下放置24小时以平衡湿料水分;
步骤3、使用双螺杆膨化机进行制粒,出料模具孔径为4.0mm,饲料经烘干机快速烘干定型并控制水分在7%-9%之间;
步骤4、使用真空喷涂机进行油脂喷涂,所述油脂为鱼油和大豆油;
步骤5、过筛并挑除破损颗粒后,得到所述条纹锯鮨幼鱼循环水养殖专用膨化饲料。
本发明第三方面提供了上述循环水养殖专用膨化饲料在饲喂条纹锯鮨幼鱼中的应用。
进一步地,所述纹锯鮨幼鱼初始均重为42.2±0.33g。
本发明的有益效果:
本发明通过70天的配合饲料投喂实验,以摄食、生长、饲料利用、全鱼组分、营养素储积率为综合评价指标,通过单因素与双因素方差分析得到条纹锯鮨幼鱼(初始均重为42.2±0.33g)的最适蛋白需求量为54%,最适脂肪需求量为16%。
不同饲料蛋脂比对条纹锯鮨幼鱼的生长产生显著影响,摄食D5(54/16)饲料的条纹锯鮨幼鱼在工厂化循环水养殖条件下具有最佳的生长表现,得到条纹锯鮨幼鱼循环水养殖专用膨化饲料的最适蛋脂比为3.375:1。
具体实施方式
下面结合实施例对本发明做更进一步地解释。下列实施例仅用于说明本发明,但并不用来限定本发明的实施范围。
1实验材料与方法
1.1主要原料及实验饲料
本次实验采用2*4双因子设计方式,共设置8个实验组,包含2种脂肪水平(12%、16%)和4种蛋白水平(54%、50%、46%和42%),分别为D1(54/12)、D2(50/12)、D3(46/12)、D4(42/12)、D5(54/16)、D6(50/16)、D7(46/16)和D8(42/16)。八种饲料的配方及其化学组成见表1。表1中预混料为多维多矿预混料,多维多矿预混料由维生素预混料和矿物预混料组成,配方分别如下:
维生素预混料(mg kg-1饲料):维生素A,1.95;维生素B1,20;维生素B2,10;维生素B6,30;烟酰胺,250;维生素C,5;泛酸钙,50;叶酸,20;维生素E,1200;维生素K,0.8;维生素D,0.05;肌醇,650;脱脂米糠,150。
矿物预混料(mg kg-1饲料):CuSO4·5H2O,10;FeSO4·7H2O,300;ZnSO4·H2O,200;MnSO4·H2O,100;KI(10%),80;Na2SeO3(10%Se),67;CoCl2·6H2O(10%Co),5;NaCl,100;沸石粉,638。
将秘鲁鱼粉、脱脂南极磷虾粉和豆粕分别粉碎后100目过筛。按配方量称取秘鲁鱼粉、脱脂南极磷虾粉、豆粕、小麦淀粉、谷朊粉和豆奶宝在双轴搅拌机中充分混匀,再按配方量称取预混料、氯化胆碱、L-赖氨酸和DL-蛋氨酸混合均匀后加入到双轴搅拌机中充分混匀,之后以秘鲁鱼粉、脱脂南极磷虾粉、豆粕、小麦淀粉、谷朊粉、豆奶宝、预混料、氯化胆碱、L-赖氨酸和DL-蛋氨酸总质量计,缓缓加入45%-50%的水并进一步混匀,得到湿料。常温下放置24小时以平衡湿料水分。饲料加工使用双螺杆膨化机(SYSLG30-IV,赛百诺科技有限公司,济南)进行制粒,出料模具孔径为4.0mm。饲料经烘干机快速烘干定型并控制水分在7%-9%之间。使用ZJB-40型真空喷涂机进行油脂(鱼油和大豆油)喷涂。过筛并挑除破损颗粒后,从每种饲料中随机挑选出3*1000颗完整饲料称重,得到每种饲料的平均粒重。
1.2实验饲料物理性状的测定
实验饲料的物理性状指标包括饲料颗粒的长度(Length,L)、粒径(Diameter,D)、饲料耐久性指数(Pellet durability index,PDI)、膨化率(Expansion rate,E)和硬度(Hardness of pellets,HP)。
每种饲料(未喷涂)中随机选取50粒颗粒完整的饲料,用数显游标卡尺对其长度L、粒径D进行测量并记录。
颗粒饲料耐久性指数PDI是反映颗粒饲料质量最主要的指标之一,它是用来衡量颗粒饲料成品在输送和搬运过程中饲料颗粒抗破碎的相对能力。本次实验使用ST-136型双箱饲料粉化测定仪(盛泰仪器有限公司,济南)对自制实验饲料的PDI进行测定。取500g未喷涂油脂的颗粒饲料(记为M)置于粉化机的回转箱内,仪器转速为50r/min,持续运转10分钟,待仪器停止工作后取出样品,使用20目,孔径0.9mm的标准筛对样品手筛2分钟左右,称取筛上物重量记为m。重复上述步骤一次,两次测定结果取平均值,即为该饲料的最终粉化率。
PDI计算公式:
式中:
m——过筛后筛上样品重量(g);
M——初始样品重量(g)。
饲料膨化率E的计算方式为:
式中:
D1——颗粒饲料的粒径(mm);
D2——出料模孔的孔径(mm)。
本次试验饲料硬度采用ST-120B型硬度测定仪(盛泰仪器有限公司,济南)对其进行测定。从每种未喷涂油脂的饲料中随机选取50颗饲料颗粒,放于硬度测定仪中测量读数并记录,取平均值。所有8种自制试验饲料的物理性状详见表2。
1.3实验用鱼及饲养管理
本次实验的条纹锯鮨幼鱼于2019年5月购置于舟山市水产养殖研究所朱家尖基地,用商品饲料暂养于浙江海洋大学中欧水产动物营养与饲料资源研究所养殖实验室直至实验规格,然后转入室内海水循环养殖***进行正式实验。实验前对条纹锯鮨幼鱼进行24小时饥饿处理,然后用MS-222麻醉剂对实验鱼进行麻醉处理。挑选健康、体魄强健、无伤病害,体长、体重基本一致的600条纹锯鮨幼鱼(初始均重约为42.2±0.33g),称重后随机放入24个容积为500L的圆柱形玻璃纤维缸中,每缸25尾。每种饲料三个平行缸。养殖过程中,每日光照15小时,通过气石24小时不间断供氧,每缸换水量4-5L/min,养殖用水盐度24-26,pH值7.0-7.5,水温25℃-28℃,溶氧>5.5mg/L,氨氮含量≤0.5mg/L,亚硝酸盐含量≤0.25mg/L。
生长实验开始后,每日投喂3次(8:00,14:00,20:00),每次投喂时间约1小时,保证每缸实验鱼达到表观饱食,不再进行摄食为止。每缸日投喂量为在该缸前三日平均净摄食量的基础上增加10%,残饵量的计算方法为每次投喂后产生的残饵数乘以每缸对应饲料的颗粒均重。饲喂实验总共进行70天。
1.4样品采集与分析
1.4.1样品采集
生长实验开始前选取10尾与实验鱼体型体重基本一致且健康活泼的条纹锯鮨幼鱼作为初始全鱼样本,使用过量MS-222将其麻醉致死并称重后保存于-20℃的冰箱中。终末取样前一天停止投喂,取样时每缸实验鱼先用MS-222(1.0mg/L)麻醉剂进行麻醉处理,随后沥干,抹去鱼体表面多余水分后称总重。然后从中选取10尾大小均匀的个体,测量其体长和体重后置于-20℃冰箱中作为全鱼样本。
1.4.2样品分析
使用SXC-12型绞肉机(恒悦食品机械有限公司,上海)将初始与各缸终末全鱼样分别搅成鱼糜,每个样本混合均匀后取样测定全鱼鲜样水分。使用DGL-758型立式蒸汽灭菌器(登冠医疗器械有限公司,江苏)将各全鱼鱼糜样本在120℃温度下高压蒸煮30分钟,再用组织均浆机中匀浆后,将匀浆液置于80℃烘箱中烘干至水分含量≤9%。烘干后使用研磨机粉碎并过30目标准筛后得到全鱼干粉,装入样品瓶中待测全鱼组分。
水分的测定采用105℃烘干恒重法,使用DHG-9140A型烘箱(精宏实验设备有限公司,上海)烘干36-48小时;灰分的测定使用SX2-4-10A型马弗炉(上虞道墟科析仪器厂,绍兴)550℃灼烧30小时;粗蛋白的测定采用凯氏定氮法,使用Opsis KD3型全自动凯氏定氮仪(OPSIS公司,瑞士);粗脂肪的测定采用索氏抽提法,使用Opsis SX-360型索氏抽提仪OPSIS公司,瑞士)。样品总能的测定采用氧弹法,使用Parr-1271型全自动氧弹量热仪(Parr公司,美国)。
1.5数据计算与统计分析
摄食量(Feed intake,FI)、鱼体增重(Weight gain,WG)、增重率(Weight gainrate,WGR)、饲料系数(Feed conversion ratio,FCR)、蛋白质储积率(Protein retentionefficiency,PRE)、能量储积率(Energy retention efficiency,ERE)的计算公式如下:
FI(g干物质/尾)=总摄食量/尾数
WG(g/尾)=终末均重-初始均重
WGR(%)=增重/初始均重×100%
FCR=摄食量/增重
PRE(%)=(终末均重*终末全鱼粗蛋白含量-初始均重*初始全鱼粗蛋白含量)/(饲料干基粗蛋白含量*摄食量)×100%
ERE(%)=(终末均重*终末全鱼能值-初始均重*初始全鱼能值)/(饲料干基能值*摄食量)×100%
使用One-way ANOVA方法对同一脂肪水平下四种不同蛋白含量饲料组的数据进行统计分析,若有显著性差异(P<0.05),则进一步做回归分析进行线性或二次项曲线估计。使用Two-way ANOVA对不同脂肪水平和不同蛋白水平两个因子进行统计分析。以上均使用SPSS 20.0软件完成。
2实验结果与分析
2.1不同饲料蛋脂比对条纹锯鮨幼鱼摄食、生长和饲料利用的影响
不同饲料蛋脂比对条纹锯鮨幼鱼的摄食量、增重、增重率和饲料系数均有显著影响(P<0.05),结果详见表3。饲料D1(54/12)和饲料D5(54/16)饲喂的条纹锯鮨幼鱼具有最高且相似的摄食量、增重和增重率,最高摄食量高达73.1g/尾,增重高达50.2g/尾,增重率高达119%,显著高于同一脂肪水平的其它3种饲料(P<0.05),同时饲料系数亦显著低于同脂肪水平的其他组(P<0.05)。以脂肪和蛋白两个水平对条纹锯鮨幼鱼的摄食、生长和饲料利用进行双因子方差分析(表4)发现,不同的脂肪含量对实验鱼的摄食、生长和饲料利用同样有显著影响(P<0.05),但蛋白质和脂肪的交互作用对条纹锯鮨幼鱼的各项生长指标无显著影响(P>0.05)。摄食量、增重、增重率随蛋白质含量降低而减少,随脂肪含量的变化亦然。饲料系数随着蛋白含量或脂肪含量的降低而增大。综上所述,基于本次实验结果,饲料D5(54/16)对实验幼鱼的摄食、生长和饲料利用方面具有更佳表现。
2.2不同饲料蛋脂比对条纹锯鮨幼鱼全鱼组分的影响
如表5所示,不同饲料蛋脂比仅对组分投喂16%脂肪水平饲料的实验鱼的全鱼粗蛋白具有显著影响(P<0.05),但对干物质、粗脂肪、灰分、能量及12%脂肪水平的全鱼粗蛋白等在各处理组间均无明显差异(P>0.05)。基于回归分析,16%脂肪水平下,鱼体粗蛋白含量与饲料中蛋白含量呈线性关系(表5,粗蛋白=0.922X+135,R2=0.83,其中X表示饲料中蛋白含量)。根据表6,脂肪含量的改变对条纹锯鮨幼鱼全鱼的干物质、粗脂肪、总能具有显著影响(P<0.05)。饲料中蛋白含量的改变仅对实验鱼全鱼的粗蛋白产生显著影响(P<0.05)。由表7,表8可得,不同饲料蛋脂比对条纹锯鮨幼鱼全鱼蛋白储积率和能量储积率均无显著差异(P>0.05)。
2.3条纹锯鮨幼鱼饲料中蛋白质和脂肪的合适含量及最适蛋脂比
根据表3,在同一脂肪水平下,不同蛋白质含量的处理组之间进行相互比较,即D1(54/12)、D2(50/12)、D3(46/12)、D4(42/12)或者D5(54/16)、D6(50/16)、D7(46/16)、D8(42/16)之间相互比较。表明高蛋白含量(54%)饲料处理组的摄食、生长和饲料利用均显著高于其他处理组(P<0.05),更适合于条纹锯鮨幼鱼的生长。因此初步判定饲料中54%的蛋白质含量为条纹锯鮨幼鱼生长所需最适的蛋白质含量。在同一蛋白质水平下,不同脂肪含量饲料的处理组之间进行比较,结果显示高脂肪组(16%)的摄食、生长和饲料利用均高于低脂肪组(12%),因此初步判定饲料中16%的脂肪含量为条纹锯鮨幼鱼最适生长所需脂肪含量。结合表5、表6,饲料中蛋白含量改变仅对全鱼粗蛋白产生显著影响(P<0.05),且实验鱼全鱼的粗蛋白含量随饲料中蛋白含量的增加而增加,饲料中蛋白含量达到50%之后无明显差异。饲料中脂肪含量的改变对鱼体干物质、粗脂肪含量和总能均产生显著影响(P<0.05),且实验鱼全鱼的干物质、粗脂肪含量和总能随饲料中脂肪含量的增加而增加。而从表7和表8可知,饲料中蛋白质含量或者脂肪含量的改变对全鱼蛋白储积率和能量储积率均无显著影响(P>0.05)。综上所述,条纹锯鮨幼鱼循环水养殖专用膨化饲料中最适蛋白质含量为54%左右,脂肪含量为16%左右,蛋脂比为3.375:1。
3结论
1.以摄食、生长、饲料利用、全鱼组分、营养素储积率为综合评价指标,通过单因素与双因素方差分析得到条纹锯鮨幼鱼(初始均重约为42.2±0.33g)的最适蛋白需求量为54%,最适脂肪需求量为16%。
2.不同饲料蛋脂比对条纹锯鮨幼鱼的生长产生显著影响(P<0.05),摄食D5(54/16)饲料的条纹锯鮨幼鱼在工厂化循环水养殖条件下具有最佳的生长表现,综上可知条纹锯鮨幼鱼循环水养殖专用膨化饲料的最适蛋脂比为54%:16%,即3.375:1。
表1条纹锯鮨幼鱼实验饲料配方及其化学成分分析(干物质基础)
表2条纹锯鮨幼鱼8种膨化饲料的物理性状
表3不同饲料蛋脂比对条纹锯鮨幼鱼摄食、生长和饲料利用的影响(基于单因素方差分析)
不同的上标字母a,b和c表示不同处理组间具有显著性差异(P<0.05)。
1综合均数标准误差。
表4不同饲料蛋脂比对条纹锯鮨幼鱼摄食、生长和饲料利用的影响(基于双因素方差分析)
不同的上标字母a,b和c表示不同处理组间具有显著性差异(P<0.05)。
1综合均数标准误差。
表5不同饲料蛋脂比对条纹锯鮨幼鱼全鱼组成成分的影响(基于单因素方差分析)
不同的上标字母a,b和c表示不同处理组间具有显著性差异(P<0.05)。
1综合均数标准误差。
表6不同饲料蛋脂比对条纹锯鮨幼鱼全鱼组成成分的影响(基于双因素方差分析)
不同的上标字母a,b和c表示不同处理组间具有显著性差异(P<0.05)。
1综合均数标准误差。
表7不同饲料蛋脂比对条纹锯鮨幼鱼蛋白储积率和能量储积率的影响(基于单因素方差分析)
1综合均数标准误差。
表8不同饲料蛋脂比对条纹锯鮨幼鱼蛋白储积率和能量储积率的影响(基于双因素方差分析)
不同的上标字母a和b表示不同处理组间具有显著性差异(P<0.05)。
1综合均数标准误差。
Claims (4)
1.一种条纹锯鮨幼鱼循环水养殖专用膨化饲料,其特征在于,以质量计,所述循环水养殖专用膨化饲料蛋白质含量为54%,脂肪含量为16%,蛋脂比为3.375:1;所述循环水养殖专用膨化饲料包括秘鲁鱼粉、脱脂南极磷虾粉、豆粕、小麦淀粉、谷朊粉、豆奶宝、鱼油、大豆油、预混料、氯化胆碱和DL-蛋氨酸,其中预混料由维生素预混料和矿物预混料组成;
以g·kg-1饲料计算各组分的具体的含量如下:秘鲁鱼粉250、脱脂南极磷虾粉40、豆粕95、小麦淀粉117、谷朊粉75、豆奶宝280、鱼油70、大豆油61、预混料10、氯化胆碱0.5和DL-蛋氨酸0.6;
以mg·kg-1饲料计算所述维生素预混料:维生素A,1.95;维生素B1,20;维生素B2,10;维生素B6,30;烟酰胺,250;维生素C,5;泛酸钙,50;叶酸,20;维生素E,1200;维生素K,0.8;维生素D,0.05;肌醇,650;脱脂米糠,150;
以mg·kg-1饲料计算所述矿物预混料:CuSO4·5H2O,10;FeSO4·7H2O,300;ZnSO4·H2O,200;MnSO4·H2O,100;KI,80;Na2SeO3,67;CoCl2·6H2O,5;NaCl,100;沸石粉,638。
2.根据权利要求1所述的条纹锯鮨幼鱼循环水养殖专用膨化饲料的制备方法,其特征在于,包括如下步骤:
步骤1、将秘鲁鱼粉、脱脂南极磷虾粉和豆粕分别粉碎后100目过筛;
步骤2、按配方量称取秘鲁鱼粉、脱脂南极磷虾粉、豆粕、小麦淀粉、谷朊粉和豆奶宝在双轴搅拌机中充分混匀,再按配方量称取预混料、氯化胆碱和DL-蛋氨酸混合均匀后加入到双轴搅拌机中充分混匀,之后以秘鲁鱼粉、脱脂南极磷虾粉、豆粕、小麦淀粉、谷朊粉、豆奶宝、预混料、氯化胆碱和DL-蛋氨酸总质量计,缓缓加入45%-50%的水并进一步混匀,得到湿料,常温下放置24小时以平衡湿料水分;
步骤3、使用双螺杆膨化机进行制粒,出料模具孔径为4.0mm,饲料经烘干机快速烘干定型并控制水分在7%-9%之间;
步骤4、使用真空喷涂机进行油脂喷涂,所述油脂为鱼油和大豆油;
步骤5、过筛并挑除破损颗粒后,得到所述条纹锯鮨幼鱼循环水养殖专用膨化饲料。
3.根据权利要求1所述的循环水养殖专用膨化饲料在饲喂条纹锯鮨幼鱼中的应用。
4.根据权利要求3所述的应用,其特征在于,所述纹锯鮨幼鱼初始均重为42.2±0.33g。
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