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首页> 外文期刊>Tropical Animal Health and Production >Effects of dietary methionine source on productive performance, blood chemical, and hematological profiles in broiler chickens under tropical conditions
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Effects of dietary methionine source on productive performance, blood chemical, and hematological profiles in broiler chickens under tropical conditions

机译：日粮蛋氨酸来源对热带条件下肉鸡生产性能，血液化学和血液学特征的影响

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摘要

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.
机译：这项研究旨在研究日粮中补充DL-蛋氨酸（DLM）和液体DL-蛋氨酸羟基类似物游离酸（MHA）对肉仔鸡生产性能，血液化学和血液学特征的影响。总共使用了216只商业雄鸡雏鸡来比较两种饮食蛋氨酸来源DLM和MHA。将小鸡放在高环境温度和相对湿度的开放式外壳中的电池笼中饲养35天。将小鸡分为三个处理，一式六份，每组12只。使用完全随机的设计。治疗组为（1）对照组（蛋氨酸和总硫氨基酸缺乏饮食），（2）饮食中补充DLM作为蛋氨酸的来源，（3）饮食中补充MHA作为蛋氨酸的来源。 DLM和MHA的生产性能没有显着差异。与对照组相比，补充DLM和MHA均显着改善了最终体重，体重增加，平均日增重和饲料转化率（P <0.01）。补充DLM和MHA均可显着增加血浆胱氨酸浓度水平（P <0.05）。使用DLM可提高血浆蛋氨酸浓度（P <0.01），并提高异嗜性/淋巴细胞比（P <0.05）。 MHA升高血浆牛磺酸和尿酸浓度水平（P <0.05）。总之，在热带条件下，补充DLM和MHA在生产性能上没有显着差异。补充DLM可增加血浆蛋氨酸浓度，而补充MHA可显着增加血浆牛磺酸和尿酸浓度。

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