氨基酸螯合锌对肉仔鸡生长代谢的影响
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摘要
本研究通过两个试验,探索了锌源与锌水平对肉仔鸡生产性能、免疫机能、组织锌沉积以及营养物质代谢相关指标的影响,旨在研究不同锌源及其添加量对肉用仔鸡的营养效应,从而为肉仔鸡实用日粮中锌适宜添加量的确定提供科学依据。
试验一氨基酸螯合锌对肉仔鸡生长性能和免疫功能的影响
本试验采用单因子和2×4二因子组合完全随机试验设计,研究日粮锌来源及锌水平对肉仔鸡生产性能与免疫机能的影响。选取体重相近的2周龄AA肉鸡(公雏)270只随机分为9个处理,每组设5个重复,每个重复6只鸡。对照组饲喂锌含量为14.97mg/kg的半纯合基础日粮;试验1至4组分别在基础日粮中添加ZnSO_4·7H_2O(分析纯)20、40、60和80mg/kg,试验5至8组分别在基础日粮中添加氨基酸螯合锌(Zn-AA) 20、40、60和80mg/kg。试验25日龄结束。结果表明,不同的锌水平对F/G影响显著(P<0.05),添加60和80mg/kgZn时,饲料转化率较低锌组显著提高(p<0.05)。锌源对生产性能无显著影响,但显著影响肉仔鸡血清ANAE活性和ND抗体滴度(P<0.05),其中氨基酸螯合锌添加组显著高于硫酸锌组。锌添加水平显著影响ANAE活性和血清ND抗体滴度(P<0.05),并呈随添加水平提高而增高的趋势,其中添加60和80mg/kg组显著高于其它各组(P<0.05)。由此可见,在缺锌日粮中补充有机和无机锌均能改善肉仔鸡的生长性能和免疫功能,但氨基酸螯合锌改善肉仔鸡免疫功能的效果优于无机锌。综合生长和免疫指标,14~25日龄肉仔鸡适宜的锌水平在70mg/kg以上。
试验二氨基酸螯合锌对肉仔鸡组织锌沉积量和物质代谢的影响
本试验采用单因子和2×4二因子组合完全随机试验设计,研究日粮锌来源及锌水平对肉仔鸡组织锌沉积量和物质代谢的影响。选取体重相近的2周龄AA肉鸡(公雏)270只随机分为9个处理,每组设5个重复,每个重复6只鸡。对照组饲喂锌含量为14.97mg/kg的半纯合基础日粮;试验1至4组分别在基础日粮中添加ZnSO_4·7H_2O(分析纯)20、40、60和80mg/kg,试验5至8组分别在基础日粮中添加氨基酸螯合锌(Zn-AA) 20、40、60和80mg/kg。试验25日龄结束。结果表明,锌源对胫骨和胰腺锌沉积量影响显著,其中Zn-AA组显著高于硫酸锌组(P<0.05);锌添加水平显著影响胫骨、胰腺和血清锌含量(P<0.01),呈随Zn添加水平提高而增高的趋势,其中80mg/kg组胰腺和血清锌含量最高,20mg/kg组最低,与其他各水平组差异显著(P<0.05)。胫骨锌呈相似的变化规律,但除20mg/kg组外,其它各组间差异不显著。锌源对肉仔鸡血糖及血清总蛋白含量有极显著的影响(P<0.01),Zn-AA组显著高于ZnSO4组。锌添加水平对二者也有显著影响,其中60mg/kg组血糖最高,显著高于其他水平组(P<0.05),20mg/kg组总蛋白最低,显著低于其它各组。由此可见,日粮Zn水平直接影响肉仔鸡组织锌储备,其中氨基酸螯合锌具有更高的组织沉积效率。此外,日粮Zn水平对糖代谢和蛋白质代谢都有影响,尤以氨基酸螯合锌的作用更为明显。
The objective of this study was to evaluate the effects of different zinc sources and zinc levels on performance, immune function, zinc deposition and nutrient metabolism of broiler chicks. It can provide scientific basis for zinc level in practical diet of broiler chicks on the basis of comparing those different zinc sources.
Experiment 1. The Effects of Zinc-Amino Acid Chelate on Performance and Immune Function of Broiler chicks
The effects of different zinc sources and zinc levels on performance and immunity function of broiler chicks at 2 week-old were studied. A single factor and a 2*4 factorial arrangement of treatments in a completely random design was conducted. 270 male chicks were divided into 9 treatments (5 duplicates per treatment and each duplicate had 6 chicks) in random. The Control Group was fed semi-purified basic diet with 14.97mg/kg of zinc content. The Group 1 to 4 were added zinc-amino acid chelate(Zn-AA)at 20, 40, 60 and 80mg/kg. The Group 5 to 8 were added ZnSO_4·7H_2O at the same level as Zn-AA .The whole experiment was ended at 25 day.
The result showed that: Feed gain ratio (F/G) was affected with dietary zinc levels significantly ( P<0.05). F/G of 60 and 80mg/kg zinc level groups were significantly higher than the groups which added zinc at lower level (P<0.05). There was no significant difference of performance among zinc sources groups, while ANAE activity and Serum ND antibody titer were affected with zinc sources, those two indexes of Zn-AA groups were higher than those of ZnSO4 groups (P<0.05). Zinc levels affected ANAE activity and Serum ND antibody titer significantly (P<0.05), and have a trend that those two indexes were increased with zinc levels were raised, those indexes of 60 and 80mg/kg zinc levels groups were higher than others significantly (P<0.05). It showed that adding organic and inorganic zinc in zinc deficiency diet can both improve performance and immune function of broiler chicks, and the effect of Zn-AA on improving immune function of broiler chicks was superior to inorganic zinc. Colligate the performance and immune indexes, the optimal zinc level in 14~25 day-old broiler chick was higher than 70mg/kg.
Experiment 2. The Effects of Zinc-Amino Acid Chelate on tissue deposition rate and nutrient metabolism of Broiler chicks
The effects of different zinc sources and zinc levels on tissue deposition rate and nutrient metabolism of broilers at 2 week-old were studied. A single factor and a 2*4 factorial arrangement of treatments in a completely random design was conducted. 270 male chicks were divided into 9 treatments (5 duplicates per treatment and each duplicate had 6 chicks) in random. The Control Group was fed semi-purified basic diet with 14.97mg/kg of zinc content. The Group 1 to 4 were added zinc-amino acid chelate(Zn-AA)at 20, 40, 60 and 80mg/kg. The Group 5 to 8 were added ZnSO_4·7H_2O at the same level as Zn-AA .The whole experiment was ended at 25 day.
The result showed that: The effect of zinc sources on zinc deposition in tibia and pancreas were significantly, and the deposition of Zn-AA group higher than that of ZnSO4 group (P<0.05). Zinc levels effected zinc content in tibia, pancreas and serum significantly (P<0.01), and have a trend that those contents were increased with zinc levels were raised, the zinc content in pancreas and serum in 80mg/kg zinc level group were highest, and the zinc content in pancreas and serum in 20 mg/kg zinc level group were the lowest, and those content in the two zinc levels groups were different form others groups significantly (P<0.05). Zinc content in tibia had similar variety law, the difference between groups except 20mg/kg zinc level group was no significant (P>0.05).Zinc sources significantly influenced content of blood glucose and serum total protein (P<0.01), and those indexes of Zn-AA group higher than ZnSO4 group. Zinc level also had significant effect on content of blood glucose and serum total protein, the content of blood glucose in 60mg/kg zinc level was higher than others groups significantly (P<0.05), and the content of serum total protein in 20mg/kg zinc level group was lower than others groups significantly (P<0.05). It showed that dietary zinc level influence tissue zinc deposition of broiler chicks directly, and Zn-AA had higher tissue zinc deposition efficiency. Besides, dietary zinc level influenced on glucose metabolism and protein metabolism, especially as Zn-AA.
试验一氨基酸螯合锌对肉仔鸡生长性能和免疫功能的影响
本试验采用单因子和2×4二因子组合完全随机试验设计,研究日粮锌来源及锌水平对肉仔鸡生产性能与免疫机能的影响。选取体重相近的2周龄AA肉鸡(公雏)270只随机分为9个处理,每组设5个重复,每个重复6只鸡。对照组饲喂锌含量为14.97mg/kg的半纯合基础日粮;试验1至4组分别在基础日粮中添加ZnSO_4·7H_2O(分析纯)20、40、60和80mg/kg,试验5至8组分别在基础日粮中添加氨基酸螯合锌(Zn-AA) 20、40、60和80mg/kg。试验25日龄结束。结果表明,不同的锌水平对F/G影响显著(P<0.05),添加60和80mg/kgZn时,饲料转化率较低锌组显著提高(p<0.05)。锌源对生产性能无显著影响,但显著影响肉仔鸡血清ANAE活性和ND抗体滴度(P<0.05),其中氨基酸螯合锌添加组显著高于硫酸锌组。锌添加水平显著影响ANAE活性和血清ND抗体滴度(P<0.05),并呈随添加水平提高而增高的趋势,其中添加60和80mg/kg组显著高于其它各组(P<0.05)。由此可见,在缺锌日粮中补充有机和无机锌均能改善肉仔鸡的生长性能和免疫功能,但氨基酸螯合锌改善肉仔鸡免疫功能的效果优于无机锌。综合生长和免疫指标,14~25日龄肉仔鸡适宜的锌水平在70mg/kg以上。
试验二氨基酸螯合锌对肉仔鸡组织锌沉积量和物质代谢的影响
本试验采用单因子和2×4二因子组合完全随机试验设计,研究日粮锌来源及锌水平对肉仔鸡组织锌沉积量和物质代谢的影响。选取体重相近的2周龄AA肉鸡(公雏)270只随机分为9个处理,每组设5个重复,每个重复6只鸡。对照组饲喂锌含量为14.97mg/kg的半纯合基础日粮;试验1至4组分别在基础日粮中添加ZnSO_4·7H_2O(分析纯)20、40、60和80mg/kg,试验5至8组分别在基础日粮中添加氨基酸螯合锌(Zn-AA) 20、40、60和80mg/kg。试验25日龄结束。结果表明,锌源对胫骨和胰腺锌沉积量影响显著,其中Zn-AA组显著高于硫酸锌组(P<0.05);锌添加水平显著影响胫骨、胰腺和血清锌含量(P<0.01),呈随Zn添加水平提高而增高的趋势,其中80mg/kg组胰腺和血清锌含量最高,20mg/kg组最低,与其他各水平组差异显著(P<0.05)。胫骨锌呈相似的变化规律,但除20mg/kg组外,其它各组间差异不显著。锌源对肉仔鸡血糖及血清总蛋白含量有极显著的影响(P<0.01),Zn-AA组显著高于ZnSO4组。锌添加水平对二者也有显著影响,其中60mg/kg组血糖最高,显著高于其他水平组(P<0.05),20mg/kg组总蛋白最低,显著低于其它各组。由此可见,日粮Zn水平直接影响肉仔鸡组织锌储备,其中氨基酸螯合锌具有更高的组织沉积效率。此外,日粮Zn水平对糖代谢和蛋白质代谢都有影响,尤以氨基酸螯合锌的作用更为明显。
The objective of this study was to evaluate the effects of different zinc sources and zinc levels on performance, immune function, zinc deposition and nutrient metabolism of broiler chicks. It can provide scientific basis for zinc level in practical diet of broiler chicks on the basis of comparing those different zinc sources.
Experiment 1. The Effects of Zinc-Amino Acid Chelate on Performance and Immune Function of Broiler chicks
The effects of different zinc sources and zinc levels on performance and immunity function of broiler chicks at 2 week-old were studied. A single factor and a 2*4 factorial arrangement of treatments in a completely random design was conducted. 270 male chicks were divided into 9 treatments (5 duplicates per treatment and each duplicate had 6 chicks) in random. The Control Group was fed semi-purified basic diet with 14.97mg/kg of zinc content. The Group 1 to 4 were added zinc-amino acid chelate(Zn-AA)at 20, 40, 60 and 80mg/kg. The Group 5 to 8 were added ZnSO_4·7H_2O at the same level as Zn-AA .The whole experiment was ended at 25 day.
The result showed that: Feed gain ratio (F/G) was affected with dietary zinc levels significantly ( P<0.05). F/G of 60 and 80mg/kg zinc level groups were significantly higher than the groups which added zinc at lower level (P<0.05). There was no significant difference of performance among zinc sources groups, while ANAE activity and Serum ND antibody titer were affected with zinc sources, those two indexes of Zn-AA groups were higher than those of ZnSO4 groups (P<0.05). Zinc levels affected ANAE activity and Serum ND antibody titer significantly (P<0.05), and have a trend that those two indexes were increased with zinc levels were raised, those indexes of 60 and 80mg/kg zinc levels groups were higher than others significantly (P<0.05). It showed that adding organic and inorganic zinc in zinc deficiency diet can both improve performance and immune function of broiler chicks, and the effect of Zn-AA on improving immune function of broiler chicks was superior to inorganic zinc. Colligate the performance and immune indexes, the optimal zinc level in 14~25 day-old broiler chick was higher than 70mg/kg.
Experiment 2. The Effects of Zinc-Amino Acid Chelate on tissue deposition rate and nutrient metabolism of Broiler chicks
The effects of different zinc sources and zinc levels on tissue deposition rate and nutrient metabolism of broilers at 2 week-old were studied. A single factor and a 2*4 factorial arrangement of treatments in a completely random design was conducted. 270 male chicks were divided into 9 treatments (5 duplicates per treatment and each duplicate had 6 chicks) in random. The Control Group was fed semi-purified basic diet with 14.97mg/kg of zinc content. The Group 1 to 4 were added zinc-amino acid chelate(Zn-AA)at 20, 40, 60 and 80mg/kg. The Group 5 to 8 were added ZnSO_4·7H_2O at the same level as Zn-AA .The whole experiment was ended at 25 day.
The result showed that: The effect of zinc sources on zinc deposition in tibia and pancreas were significantly, and the deposition of Zn-AA group higher than that of ZnSO4 group (P<0.05). Zinc levels effected zinc content in tibia, pancreas and serum significantly (P<0.01), and have a trend that those contents were increased with zinc levels were raised, the zinc content in pancreas and serum in 80mg/kg zinc level group were highest, and the zinc content in pancreas and serum in 20 mg/kg zinc level group were the lowest, and those content in the two zinc levels groups were different form others groups significantly (P<0.05). Zinc content in tibia had similar variety law, the difference between groups except 20mg/kg zinc level group was no significant (P>0.05).Zinc sources significantly influenced content of blood glucose and serum total protein (P<0.01), and those indexes of Zn-AA group higher than ZnSO4 group. Zinc level also had significant effect on content of blood glucose and serum total protein, the content of blood glucose in 60mg/kg zinc level was higher than others groups significantly (P<0.05), and the content of serum total protein in 20mg/kg zinc level group was lower than others groups significantly (P<0.05). It showed that dietary zinc level influence tissue zinc deposition of broiler chicks directly, and Zn-AA had higher tissue zinc deposition efficiency. Besides, dietary zinc level influenced on glucose metabolism and protein metabolism, especially as Zn-AA.
引文
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