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Effect of replacement different methionine levels and sources with betaine on blood metabolites, breast muscle morphology and immune response in heat-stressed broiler chickens
Italian Journal of Animal Science ( IF 2.2 ) Pub Date : 2021-01-07
Fatemeh Sahebi-Ala, Ahmad Hassanabadi, Abolghasem Golian

Abstract

This study was performed to evaluate the effect of replacement different methionine (Met) levels and sources (DL or L) with betaine on blood metabolites, breast muscle morphology and immune response in heat-stressed broiler chickens. A total of 1200 unsexed day-old Ross-308 chicks were raised under the same condition in the first 10 days and then reared under normal or subnormal (32 °C) ambient temperatures for the 11 to 42 days of age. The experiment was designed as a split-plot factorial arrangement with 2 (temperatures) × 2 (Met sources) × 3 (Met levels) × 2 (betaine amounts). Met level in the basal diet was 30% lower than recommendation (Low-Met) and was increased to recommendation (Rec-Met) or 30% more than it (High-Met) by supplemental DL- or L-Met. Betaine was or was not substituted at the rate of 30% of the supplemental DL- or L-Met. From 11 to 24 d of age, broilers fed high-met diets showed better FCR than those received Low- and Rec-Met diet. High-Met diet under heat stress (HS) showed highest plasma uric acid and homocysteine concentration than two other diets, under normal or HS condition. Replacing 30% of the supplemental Met with betaine showed lower plasma homocysteine concentration compared to non-supplemented betaine diets. Birds fed Low- and Rec-Met diets under normal condition showed a significant decrease in heterophil/lymphocyte ratio compared to their counterparts under HS. Birds fed L-Met supplemented diet showed a greater myofibers diameter than birds fed DL-Met diet. In general, High-Met diet decreased heterophil/lymphocyte ratio and FCR of broilers. A total of 30% of dietary supplemental Met can be replaced by betaine.

  • Highlights
  • Heat stress increase methionine requirements of broiler chickens.

  • L-methionine increases breast yield in compare with DL-methionine.

  • Betaine in animal feed can be replaced by methionine without adverse effect on broiler chickens.



中文翻译:

甜菜碱替代不同蛋氨酸水平和来源对热应激肉鸡血液代谢产物,胸肌形态和免疫反应的影响

摘要

进行这项研究以评估用甜菜碱替代不同蛋氨酸(Met)水平和来源(DL或L)对热应激肉鸡的血液代谢产物,胸肌形态和免疫反应的影响。在开始的10天内,在相同条件下饲养了1200只未性别化的日龄Ross-308雏鸡,然后在正常或低于正常(32°C)的环境温度下饲养了11至42天。实验设计为2(温度)×2(Met源)×3(Met水平)×2(甜菜碱量)的分解图因子分解设计。基础饮食中的蛋氨酸水平比推荐水平(低蛋氨酸)低30%,通过补充DL-或L-蛋氨酸达到推荐水平(Rec-Met)或比推荐水平(高蛋氨酸)高30%。甜菜碱被取代或未被取代的比例为补充DL-或L-Met的30%。从11日至24日龄,饲喂高日粮的肉鸡的FCR比接受低日和Rec-Met日粮的肉鸡更好。在正常或HS条件下,热应激(HS)的高热量饮食显示的血浆尿酸和高半胱氨酸浓度高于其他两种饮食。与未补充甜菜碱饮食相比,用甜菜碱替代30%的补充Met会显示较低的血浆同型半胱氨酸浓度。在正常条件下,饲喂低和Rec-Met日粮的家禽与HS相比,其异养/淋巴细胞比率显着降低。饲喂L-Met饮食的鸟类的肌纤维直径比饲喂DL-Met饮食的鸟类更大。一般而言,高营养饮食会降低肉鸡的异嗜性/淋巴细胞比率和FCR。甜菜碱可替代总共30%的膳食补充Met。饲喂高日粮的肉鸡的FCR比低日和Rec-Met日粮的肉鸡更好。在正常或HS条件下,热应激(HS)的高热量饮食显示的血浆尿酸和高半胱氨酸浓度高于其他两种饮食。与未补充甜菜碱饮食相比,用甜菜碱替代30%的补充Met会显示较低的血浆同型半胱氨酸浓度。在正常条件下,饲喂低和Rec-Met日粮的家禽与HS相比,其异养/淋巴细胞比率显着降低。饲喂L-Met饮食的鸟类的肌纤维直径比饲喂DL-Met饮食的鸟类更大。一般而言,高营养饮食会降低肉鸡的异嗜性/淋巴细胞比率和FCR。甜菜碱可以替代总共30%的膳食补充Met。饲喂高日粮的肉鸡的FCR比低日和Rec-Met日粮的肉鸡更好。在正常或HS条件下,热应激(HS)的高热量饮食显示的血浆尿酸和高半胱氨酸浓度高于其他两种饮食。与未补充甜菜碱饮食相比,用甜菜碱替代30%的补充Met会显示较低的血浆同型半胱氨酸浓度。在正常条件下,饲喂低和Rec-Met日粮的家禽与HS相比,其异养/淋巴细胞比率显着降低。饲喂L-Met饮食的鸟类的肌纤维直径比饲喂DL-Met饮食的鸟类更大。一般而言,高营养饮食会降低肉鸡的异嗜性/淋巴细胞比率和FCR。甜菜碱可以替代总共30%的膳食补充Met。在正常或HS条件下,热应激(HS)的高热量饮食显示的血浆尿酸和高半胱氨酸浓度高于其他两种饮食。与未补充甜菜碱饮食相比,用甜菜碱替代30%的补充Met会显示较低的血浆同型半胱氨酸浓度。与在HS情况下的同伴相比,在正常条件下饲喂低和Rec-Met饮食的鸟类显示出异养/淋巴细胞比率显着降低。饲喂L-Met饮食的鸟类的肌纤维直径比饲喂DL-Met饮食的鸟类更大。一般而言,高营养饮食会降低肉鸡的异嗜性/淋巴细胞比率和FCR。甜菜碱可以替代总共30%的膳食补充Met。在正常或HS条件下,热应激(HS)的高热量饮食显示的血浆尿酸和高半胱氨酸浓度高于其他两种饮食。与未补充甜菜碱饮食相比,用甜菜碱替代30%的补充Met会显示较低的血浆同型半胱氨酸浓度。与在HS情况下的同伴相比,在正常条件下饲喂低和Rec-Met饮食的鸟类显示出异养/淋巴细胞比率显着降低。饲喂L-Met饮食的鸟类的肌纤维直径比饲喂DL-Met饮食的鸟类更大。一般而言,高营养饮食会降低肉鸡的异嗜性/淋巴细胞比率和FCR。甜菜碱可以替代总共30%的膳食补充Met。与未补充甜菜碱饮食相比,用甜菜碱替代30%的补充Met会显示较低的血浆同型半胱氨酸浓度。在正常条件下,饲喂低和Rec-Met日粮的家禽与HS相比,其异养/淋巴细胞比率显着降低。饲喂L-Met饮食的鸟类的肌纤维直径比饲喂DL-Met饮食的鸟类更大。一般而言,高营养饮食会降低肉鸡的异嗜性/淋巴细胞比率和FCR。甜菜碱可替代总共30%的膳食补充Met。与未补充甜菜碱饮食相比,用甜菜碱替代30%的补充Met会显示较低的血浆同型半胱氨酸浓度。在正常条件下,饲喂低和Rec-Met日粮的家禽与HS相比,其异养/淋巴细胞比率显着降低。饲喂L-Met饮食的鸟类的肌纤维直径比饲喂DL-Met饮食的鸟类更大。一般而言,高营养饮食会降低肉鸡的异嗜性/淋巴细胞比率和FCR。甜菜碱可替代总共30%的膳食补充Met。饲喂L-Met饮食的鸟类的肌纤维直径比饲喂DL-Met饮食的鸟类更大。一般而言,高营养饮食会降低肉鸡的异嗜性/淋巴细胞比率和FCR。甜菜碱可以替代总共30%的膳食补充Met。饲喂L-Met饮食的鸟类的肌纤维直径比饲喂DL-Met饮食的鸟类更大。一般而言,高营养饮食会降低肉鸡的异嗜性/淋巴细胞比例和FCR。甜菜碱可以替代总共30%的膳食补充Met。

  • 强调
  • 热应激增加了肉鸡蛋氨酸的需求量。

  • 与DL-蛋氨酸相比,L-蛋氨酸可提高乳房产量。

  • 可以用蛋氨酸代替动物饲料中的甜菜碱,而不会对肉鸡造成不良影响。

更新日期:2021-01-07
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