CN107519843A - 畜禽饲料t‑2毒素复合吸附剂及其制备方法和应用 - Google Patents

畜禽饲料t‑2毒素复合吸附剂及其制备方法和应用 Download PDF

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CN107519843A
CN107519843A CN201710780100.4A CN201710780100A CN107519843A CN 107519843 A CN107519843 A CN 107519843A CN 201710780100 A CN201710780100 A CN 201710780100A CN 107519843 A CN107519843 A CN 107519843A
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孙铝辉
齐德生
张妮娅
高鑫
赵玲
吴坤坦
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Huazhong Agricultural University
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Abstract

本发明公开了一种畜禽饲料T‑2毒素复合吸附剂及其制备方法和应用,所述复合吸附剂的原料按照重量百分比计由60~65%的改性蒙脱石、1.0~1.5%的硒代蛋氨酸羟基类似物、18~21%的酵母细胞壁多糖、10~15%的改性活性炭和2.0~3.0%的姜黄素组成。将改性蒙脱石、硒代蛋氨酸羟基类似物、酵母细胞壁多糖、改性活性炭和姜黄素混合均匀;得到畜禽饲料T‑2毒素复合吸附剂。本发明将以上配方合成的脱毒剂添加适当剂量于肉鸡日粮中,发现与现有市售脱毒剂相比,本发明能有效缓解T‑2毒素引起的毒性效应,特别是能提高肉鸡生长性能,促进机体健康,且少量添加即可获得较好效果,降低生产成本。

Description

畜禽饲料T-2毒素复合吸附剂及其制备方法和应用
技术领域
本发明涉及复合吸附剂领域,具体地指一种畜禽饲料T-2毒素复合吸附剂及其制备方法和应用。
背景技术
T-2毒素属于单端孢霉烯族毒素,由镰刀菌属的菌侏产生。T-2毒素广泛存在于各类谷物粮食作物中,其中,我国谷物中T-2毒素的检出率为80%(Liu等,1996)。玉米、小麦、大麦、燕麦和黑麦是受T-2毒素污染最为严重的作物品种。T-2毒素的毒性较强,畜禽高剂量摄入含有T-2毒素的饲料可导致其急性中毒,主要症状表现为呕吐、出血性素质和心血管功能障碍死亡(Parent等,2004)。低剂量的摄入也会导致其慢性中毒,主要症状为生产性能下降,包括食欲不振、采食量下降、体重下降、饲料转化效率下降及口腔和食道病变等(Hoehler等,1996;Edrington等,1997)。同时,T-2毒素还能诱发动物免疫抑制,造成动物对环境应激及病原微生物的抵抗能力减弱,容易感染各种疾病(Li等,2006)。T-2毒素对不同动物的毒性有一定种属差异,其中雏鸡对T-2毒素尤为敏感。T-2毒素能引起鸡的食欲不振、采食量下降、拒食,进而诱发生长阻滞,还可引起蛋鸡的产蛋量降低、蛋壳变薄、孵化率降低等现象(Hoehler等,1996)。此外,动物食用受污染的饲料会造成动物源性食品存在的毒素残留,威胁着人类的健康。近年,饲料霉菌毒素污染致畜禽中毒事件仍然时有发生,给饲料行业和养殖业造成了巨大经济损失。
目前,畜禽生产中应用最为广泛的霉菌毒素脱毒方法是以吸附脱毒为主。蒙脱石和活性炭引起较好的吸附作用被广泛应用于霉菌毒素脱毒剂,但因其吸附力具有非特异性,容易大量吸附饲料中的其他营养物质,可能引起动物的营养缺乏症;不同来源和成分的活性炭则存在与霉菌毒素结合力强弱的较大差异等缺陷,这些问题使得目前很多霉菌毒素吸附剂的真正吸附效果和临床应用效果难于评价。因此,目前常用的饲料霉菌毒素吸附剂往往只着重于产品本身对毒素的吸附排除作用,而忽视添加剂对机体健康的保护作用。
发明内容
本发明目的之一是提供了一种畜禽饲料T-2毒素复合吸附剂及其制备方法,该方法在改性物理吸附的基础上,加入具有抗氧化作用的硒元素和姜黄素,研制出具有吸附和抗氧化解毒功效的脱毒剂,该复合吸附剂具有对毒素的吸附排除作用,同时保护机体健康。
本发明目的之二是提供了畜禽饲料T-2毒素复合吸附剂作为饲料添加剂的应用,将复合吸附剂添加于T-2毒素污染的日粮中后,对T-2引起的毒性损伤具有良好的缓解作用,能提高动物采食量和促进动物的健康。
为实现上述目的,本发明提供的一种畜禽饲料T-2毒素复合吸附剂,所述复合吸附剂的原料按照重量百分比计由60~65%的改性蒙脱石、1.0~1.5%的硒代蛋氨酸羟基类似物、18~21%的酵母细胞壁多糖、10~15%的改性活性炭和2.0~3.0%的姜黄素组成。
进一步地,所述复合吸附剂的原料按照重量百分比计由60~63%的改性蒙脱石、1.0~1.2%的硒代蛋氨酸羟基类似物、18~21%的酵母细胞壁多糖、12~15%的改性活性炭和2.0~3.0%的姜黄素组成。
再进一步地,所述复合吸附剂的原料按照重量百分比计由62.0%的改性蒙脱石、1.0%的硒代蛋氨酸、20%的酵母细胞壁多糖、15%的改性活性炭和2.0%的姜黄素。
再进一步地,所述硒代蛋氨酸羟基类似物中硒元素含量为2.0~2.5%。
再进一步地,所述改性活性炭由活性炭经高温处理得到,所述改性活性炭的中孔容积为0.570~0.685cm3/g,比表面积为1030~1078m2/g。
本发明还提供了一种上述畜禽饲料T-2毒素复合吸附剂的制备方法,包括以下步骤:
1)将按照上述重量百分比称取改性蒙脱石、硒代蛋氨酸羟基类似物、酵母细胞壁多糖、改性活性炭和姜黄素,备用;
2)将改性蒙脱石、硒代蛋氨酸羟基类似物、酵母细胞壁多糖、改性活性炭和姜黄素混合均匀;得到畜禽饲料T-2毒素复合吸附剂。
再进一步地,所述步骤1)中,改性活性炭的制备方法:将粉状活性炭置于温度为1000~1200℃条件下隔氧热处理3~5h制得改性活性炭。
再进一步地,所述改性活性炭的中孔容积为0.570~0.685cm3/g,比表面积为1030~1078m2/g。
本发明还提供了一种上述畜禽饲料T-2毒素复合吸附剂作为添加剂添加在T-2毒素污染的日粮中应用,所述日粮中,畜禽饲料T-2毒素复合吸附剂的添加量为0.5~1.0g/kg。
本发明的有益效果在于:
本发明将以上配方合成的脱毒剂添加适当剂量于肉鸡日粮中,发现与现有市售脱毒剂相比,本发明能有效缓解T-2毒素引起的毒性效应,特别是能提高肉鸡生长性能,促进机体健康,且少量添加即可获得较好效果,降低生产成本。
具体实施方式
为了更好地解释本发明,以下结合具体实施例进一步阐明本发明的主要内容,但本发明的内容不仅仅局限于以下实施例。
一种畜禽饲料T-2毒素复合吸附剂,所述复合吸附剂的原料按照重量百分比计由60~65%的改性蒙脱石、1.0~1.5%的硒代蛋氨酸羟基类似物、18~21%的酵母细胞壁多糖、10~15%的改性活性炭和2.0~3.0%的姜黄素组成。
上述畜禽饲料T-2毒素复合吸附剂的制备方法,包括以下步骤:
1)将粉状活性炭置于温度为1000~1200℃条件下隔氧热处理3~5h制得改性活性炭;所述改性活性炭的中孔容积为0.570~0.685cm3/g,比表面积为1030~1078m2/g;
2)将按照上述重量百分比称取改性蒙脱石、硒代蛋氨酸羟基类似物、酵母细胞壁多糖、改性活性炭和姜黄素,备用;
3)将改性蒙脱石、硒代蛋氨酸羟基类似物、酵母细胞壁多糖、改性活性炭和姜黄素混合均匀;得到畜禽饲料T-2毒素复合吸附剂。
上述原料来源:
改性蒙脱石的制备方法:
1)将400g市售钙基蒙脱石,倒入400mL蒸馏水中,配成矿浆,
2)然后加入6%的NaF改型剂,70℃左右水浴2h,制成钠化蒙脱石,洗涤烘干;
3)将0.5mol/L的FeCl3溶液与NaOH溶液以体积比=1:1.5~2.5混合,制成改性剂;
4)将钠化蒙脱石与改性剂溶液以质量体积比1:1.5~3.0g/ml比例混合,60℃恒温振荡10h。静置10h,后过滤干燥,110℃活化。制得无机改性蒙脱石。
硒代蛋氨酸羟基类似物、酵母细胞壁多糖、活性炭和姜黄素购于市面。
将上述畜禽饲料T-2毒素复合吸附剂添加疗效对比实验
1、畜禽饲料T-2毒素复合吸附剂在雏鸡T-2毒素中毒模型中的解毒功能效果
1.1动物实验设计及给药:
试验选用健康、体重相近的1日龄科宝(Cobb)肉鸡120羽,随机分为5个处理组,每组4个重复,每个重复6羽。试验前彻底清扫鸡舍、鸡笼,熏蒸消毒。试验期饲喂2周的试验日粮,具体见表1。于试验第1天接种新城疫系苗。采用笼养的方式,自由饮水和采食,每天观察动物表现。
表1 T-2毒素复合吸附剂添加剂在肉鸡中脱毒效果研究的试验分组
备注:基础日粮配方参见NRC 1994;畜禽饲料 T-2毒素复合吸附剂和市售脱毒剂添加量均为0.05%。
1.2检测指标:
1.21生长性能的测定
试验初和试验末清晨空腹称重。记录试验全期的发病与死亡情况。实验期间记录每天每笼采食量。各处理组分别于试验的第7和14天测定肉鸡的采食量和体重,用于平均采食量、平均增重和饲料转化率(FCR)的计算。
饲料转化率(FCR)=采食量/体增重
1.22血液生化指标的测定
于试验的第14天,每组采集8只肉鸡血清组织用于血液常规指标的测定。
用10ml离心管采血,采血后在室温下静置2小时,在4℃条件下过夜,次日离心。血液在3000r/min下离心10min,取上清于1.5ml EP管中,-80℃保存。样品用全自动生化分析仪测定谷丙转氨酶(ALT)、谷草转氨酶(AST)、总蛋白(TP)、白蛋白(ALB)等指标。
1.23结果:
日粮添加T-2毒素后,引起肉鸡采食量日增重和饲料转化效率显著下降,毒性作用显著;本发明吸附剂在T-2毒素污染的肉鸡日粮中添加后,显著提高了T-2毒素中毒肉鸡的采食量和日增重,并提高了饲料效率,且显著降低血清中谷草转氨酶(AST)的含量,说明其有一定护肝作用;且本发明的吸附剂在饲料转化率方面显著优于市售脱毒剂B,可以减少养殖成本。单独添加本发明脱毒剂对肉鸡生长性能无任何不良影响。
基于以上结果,说明本发明的畜禽饲料T-2毒素复合吸附剂对肉鸡T-2毒素中毒引起的生长性能下降有良好的缓解作用,且效果优于市售脱毒剂。
表3日粮中添加脱毒剂和T-2毒素对雏鸡生长性能的影响(X±S)
表4日粮中添加脱毒剂和T-2毒素对14日龄肉鸡血液生化指标的影响(X±S)
实施例1
上述畜禽饲料T-2毒素复合吸附剂1的制备方法,包括以下步骤:
1)将粉状活性炭置于温度为1100℃条件下隔氧热处理4h制得改性活性炭;所述改性活性炭的中孔容积为0.570~0.685cm3/g,比表面积为1030~1078m2/g;
2)将按照上述重量百分比称取62.0%的改性蒙脱石、1.0%的硒代蛋氨酸、20%的酵母细胞壁多糖、15%的改性活性炭和2.0%的姜黄素,备用;
3)将改性蒙脱石、硒代蛋氨酸羟基类似物、酵母细胞壁多糖、改性活性炭和姜黄素混合均匀;得到畜禽饲料T-2毒素复合吸附剂1。
实施例2
本实施例制备畜禽饲料T-2毒素复合吸附剂2的方法与实施例制备方法基本相同,不同之处在于:
畜禽饲料T-2毒素复合吸附剂2的原料按照重量百分比计由65%的改性蒙脱石、1.0%的硒代蛋氨酸羟基类似物、21%的酵母细胞壁多糖、10%的改性活性炭和3.0%的姜黄素组成。
实施例3
本实施例制备畜禽饲料T-2毒素复合吸附剂3的方法与实施例制备方法基本相同,不同之处在于:
畜禽饲料T-2毒素复合吸附剂3的原料按照重量百分比计由60%的改性蒙脱石、1.5%的硒代蛋氨酸羟基类似物、21%的酵母细胞壁多糖、15%的改性活性炭和2.5%的姜黄素组成。
实施例4
本实施例制备畜禽饲料T-2毒素复合吸附剂4的方法与实施例制备方法基本相同,不同之处在于:
畜禽饲料T-2毒素复合吸附剂4的原料按照重量百分比计由63%的改性蒙脱石、1.2%的硒代蛋氨酸羟基类似物、20%的酵母细胞壁多糖、13%的改性活性炭和2.8%的姜黄素组成。
其它未详细说明的部分均为现有技术。尽管上述实施例对本发明做出了详尽的描述,但它仅仅是本发明一部分实施例,而不是全部实施例,人们还可以根据本实施例在不经创造性前提下获得其他实施例,这些实施例都属于本发明保护范围。

Claims (9)

1.一种畜禽饲料T-2毒素复合吸附剂,其特征在于:所述复合吸附剂的原料按照重量百分比计由60~65%的改性蒙脱石、1.0~1.5%的硒代蛋氨酸羟基类似物、18~21%的酵母细胞壁多糖、10~15%的改性活性炭和2.0~3.0%的姜黄素组成。
2.根据权利要求1所述畜禽饲料T-2毒素复合吸附剂,其特征在于:所述复合吸附剂的原料按照重量百分比计由60~63%的改性蒙脱石、1.0~1.2%的硒代蛋氨酸羟基类似物、18~21%的酵母细胞壁多糖、12~15%的改性活性炭和2.0~3.0%的姜黄素组成。
3.根据权利要求2所述畜禽饲料T-2毒素复合吸附剂,其特征在于:所述复合吸附剂的原料按照重量百分比计由62.0%的改性蒙脱石、1.0%的硒代蛋氨酸、20%的酵母细胞壁多糖、15%的改性活性炭和2.0%的姜黄素。
4.根据权利要求1或2或3所述畜禽饲料T-2毒素复合吸附剂,其特征在于:所述硒代蛋氨酸羟基类似物中硒元素含量为2.0~2.5%。
5.根据权利要求1或2或3所述畜禽饲料T-2毒素复合吸附剂,其特征在于:所述改性活性炭由活性炭经高温处理得到,所述改性活性炭的中孔容积为0.570~0.685cm3/g,比表面积为1030~1078m2/g。
6.一种权利要求1~3中任意一项所述畜禽饲料T-2毒素复合吸附剂的制备方法,其特征在于:包括以下步骤:
1)将按照上述重量百分比称取改性蒙脱石、硒代蛋氨酸羟基类似物、酵母细胞壁多糖、改性活性炭和姜黄素,备用;
2)将改性蒙脱石、硒代蛋氨酸羟基类似物、酵母细胞壁多糖、改性活性炭和姜黄素混合均匀;得到畜禽饲料T-2毒素复合吸附剂。
7.根据权利要求6所述畜禽饲料T-2毒素复合吸附剂的制备方法,其特征在于:所述步骤1)中,改性活性炭的制备方法:将粉状活性炭置于温度为1000~1200℃条件下隔氧热处理3~5h制得改性活性炭。
8.根据权利要求7所述畜禽饲料T-2毒素复合吸附剂的制备方法,其特征在于:所述改性活性炭的中孔容积为0.570~0.685cm3/g,比表面积为1030~1078m2/g。
9.一种权利要求1所述畜禽饲料T-2毒素复合吸附剂作为添加剂添加在T-2毒素污染的日粮中应用,其特征在于:所述日粮中,畜禽饲料T-2毒素复合吸附剂的添加量为0.5~1.0g/kg。
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