当前位置: X-MOL 学术Br. Poult. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
PERFORMANCE AND MEAT QUALITY OF BROILER CHICKENS REARED ON TWO DIFFERENT LITTER MATERIALS AND AT TWO STOCKING DENSITIES
British Poultry Science ( IF 2 ) Pub Date : 2020-12-16
Hérica de Araujo Costa, Roberta Gomes Marçal Vieira Vaz, Mônica Calixto da Silva, Kênia Ferreira Rodrigues, Luciano Fernandes Sousa, Latóya de Sousa Bezerra, Mayara da Cruz Ribeiro, Aleane Francisca Cordeiro Barbosa, Josimar Santos de Almeida, Magna Ferreira de Oliveira

ABSTRACT

This study evaluated the performance and meat quality of broiler chickens reared on two litter materials and at two stocking densities.

  1. The chicks were allotted in a completely randomised design in a 2x2 factorial arrangement with two litter materials (wood shavings or rice straw) and two stocking densities (24 or 30 kg/m2), with six replicates per treatment. Broiler performance, carcass yield, prime cuts, blood plasma proteins, the enzymes alanine aminotransferase and aspartate aminotransferase, edible viscera, immune organs, intestine weight and length, abdominal fat, breast meat colour, pH, weight loss by defrosting, weight loss by cooking and shear force were evaluated.

  2. The density of 24 kg/m2 positively influenced feed consumption and weight gain. The type of litter had a positive influence on feed conversion, with a lower value for birds raised on wood shavings.

  3. Breast production was improved in birds reared at a density of 24 kg/m2 when compared to birds reared at a density of 30 kg/m2. The rice straw bedding negatively affected abdominal fat (resulting in higher percentages) when compared to birds reared on wood shavings.

  4. The types of litter affected the enzyme aspartate aminotransferase in birds raised on wood shavings, although these values were not increased to the point of influence on the physiological functions of broilers.

  5. The colour of the breast meat, pH, temperature, weight loss after thawing or cooking, shear force, cholesterol, triglycerides, albumin, total proteins, glucose or alanine aminotransferase content were not influenced by the stocking densities or bedding.

  6. The use of wood shavings as poultry bedding at a stocking density of 24 kg/m2 resulted in the best performance for broiler chickens at 42 days of age.



中文翻译:

两种不同垫料和两种填充密度下雏鸡的性能和肉品质

摘要

这项研究评估了用两种垫料和两种放养密度饲养的肉鸡的性能和肉质。

  1. 以完全随机的设计,以2x2因子分配方式给小鸡分配两种垃圾材料(刨花或稻草)和两种饲养密度(24或30 kg / m 2),每次处理重复六次。肉鸡性能,car体产量,初切肉,血浆蛋白,丙氨酸氨基转移酶和天冬氨酸氨基转移酶,食用内脏,免疫器官,肠的重量和长度,腹部脂肪,胸肉颜色,pH,除霜引起的体重减轻,烹饪引起的体重减轻评估剪切力。

  2. 24 kg / m 2的密度对饲料消耗和体重增加产生积极影响。凋落物的类型对饲料转化率有积极的影响,用刨花饲养的鸟的价值较低。

  3. 与以30 kg / m 2的密度饲养的家禽相比,以24 kg / m 2的密度饲养的家禽的胸脯产量得到改善。与用刨花饲养的鸟类相比,稻草被褥对腹部脂肪产生了负面影响(导致百分比更高)。

  4. 凋落物的类型会影响刨花饲养的鸟类中的天冬氨酸转氨酶,尽管这些值并未增加到影响肉鸡生理功能的程度。

  5. 母乳的颜色,pH,温度,解冻或烹饪后的体重减轻,剪切力,胆固醇,甘油三酸酯,白蛋白,总蛋白,葡萄糖或丙氨酸氨基转移酶的含量不受放养密度或垫料的影响。

  6. 放牧密度为24 kg / m2时,使用刨花作为家禽垫料使42日龄的肉鸡表现最佳。

更新日期:2020-12-16
down
wechat
bug