Effects of dietary methionine source on productive performance, blood chemical, and hematological profiles in broiler chickens under tropical conditions
Effects of dietary methionine source on productive performance, blood chemical, and hematological profiles in broiler chickens under tropical conditions
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DOI：
10.1007/s11250-012-0164-7
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发表时间：
2012-12-01
影响因子：
1.7
通讯作者：
Bunchasak, Chaiyapoom
中科院分区：
文献类型：
--
作者：
Yodseranee, Rachawadee;Bunchasak, Chaiyapoom
本试验旨在研究在日粮中添加dl-蛋氨酸（DLM）和液体dl-蛋氨酸羟基类似物游离酸（MHA）对热带条件下肉鸡生产性能、血液生化指标和血液学特性的影响。在所有，216个商业雄性肉仔鸡被用来比较两种日粮蛋氨酸来源，DLM和MHA。将雏鸡在高环境温度和相对湿度的开放式笼舍中饲养35天。将雏鸡分为3个处理，每个处理6个重复，每个重复12只雏鸡。采用完全随机设计。试验组为（1）对照组（蛋氨酸和总硫氨基酸缺乏日粮）、（2）日粮中添加DLM作为蛋氨酸源、（3）日粮中添加MHA作为蛋氨酸源。DLM和MHA的生产性能差异不显著。与对照组相比，添加DLM和MHA均显著提高了肉鸡的最终体重、增重、平均日增重和饲料转化率（P < 0.01）。添加DLM和MHA均显著提高血浆胱氨酸水平（P < 0.05）。DLM能显著提高血浆蛋氨酸浓度（P < 0.01），并能显著提高异嗜性粒细胞/淋巴细胞比值（P < 0.05）。而MHA则使血浆牛磺酸和尿酸浓度升高（P < 0.05）。总之，在热带条件下，添加DLM和MHA对生产性能无显著影响;添加DLM可提高血浆蛋氨酸浓度，而添加MHA可显著提高血浆牛磺酸和尿酸浓度。
This study was conducted to investigate the effects of supplementation of dl-methionine (DLM) and liquid dl-methionine hydroxy analog free acid (MHA) in diets on productive performance, blood chemical, and hematological profiles in broiler chickens under tropical conditions. In all, 216 commercial male broiler chicks were used to compare two dietary methionine sources, DLM and MHA. Chicks were raised for 35 days in battery cages situated in high ambient temperature and relative humidity open-side housing. The chicks were divided into three treatments in six replications with 12 chicks each. A completely randomized design was used. The treatment groups were (1) control group (methionine and total sulfur amino acid deficient diet), (2) supplementation of DLM as the methionine source in diet, and (3) supplementation of MHA as the methionine source in diet. The productive performance of DLM and MHA was not significantly different. Both supplementation of DLM and MHA significantly improved final body weight, body weight gain, average daily gain, and feed conversion ratio when compared to the control group (P < 0.01). Both DLM and MHA supplementation significantly increased the plasma cystine concentration level (P < 0.05). The use of DLM enhanced the plasma methionine concentration (P < 0.01) and increased the heterophil/lymphocyte ratio (P < 0.05). While MHA elevated the plasma taurine and uric acid concentration levels (P < 0.05). In conclusion, under tropical conditions, there was no significant difference between DLM and MHA supplementation on productive performance; plasma methionine concentration was increased by DLM supplementation, while plasma taurine and uric acid concentration were significantly increased by MHA supplementation.