Dietary energy:protein ratio influences the efficiency of utilization of dietary protein by growing turkeys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F23%3A91885" target="_blank" >RIV/60460709:41210/23:91885 - isvavai.cz</a>

Výsledek na webu

<a href="http://10.1080/00071668.2022.2116696" target="_blank" >http://10.1080/00071668.2022.2116696</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/00071668.2022.2116696" target="_blank" >10.1080/00071668.2022.2116696</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dietary energy:protein ratio influences the efficiency of utilization of dietary protein by growing turkeys

Popis výsledku v původním jazyce

1. The following experiment was designed to confirm that the efficiency of dietary protein utilisation can be reduced when the AMEn to digestible crude protein ratio of the feed falls below a critical level. In addition, whether the efficiency would be improved at high DCP contents through the addition of oil or starch was determined. 2. A 14d trial using BUT 6 turkeys, was designed to measure the effects on ep of four feeds with AMEn, DCP ratios ranging from 45 to 72 MJ AMEn per kg, and two additional feeds with the same DCP as the highest protein feed, through the addition of canola oil, Twenty birds constituted each experimental unit, with two replications of each sex being used per dietary treatment. 3. Ten birds per sex were sampled at the start of the trial and a further five per pen at the end for carcass analysis. Each carcass including feathers was ground and subsampled for water, protein and lipid determination. 4. A split-line regression described ep on the four feeds unsupplemented with additional energy with breakpoint at 60,6 MJ AME per kg DCP, maximum ep at 0,736 g per g, and a slope of 0,017. No improvement in ep resulted from supplementing the high protein feed with oil or a mixture of oil and starch, but feed intake and protein and lipid retention increased significantly. 5. The argument that insufficient energy is available to enable high protein feeds to be utilised efficiently was not corroborated by the evidence from this trial.

Název v anglickém jazyce

Dietary energy:protein ratio influences the efficiency of utilization of dietary protein by growing turkeys

Popis výsledku anglicky

1. The following experiment was designed to confirm that the efficiency of dietary protein utilisation can be reduced when the AMEn to digestible crude protein ratio of the feed falls below a critical level. In addition, whether the efficiency would be improved at high DCP contents through the addition of oil or starch was determined. 2. A 14d trial using BUT 6 turkeys, was designed to measure the effects on ep of four feeds with AMEn, DCP ratios ranging from 45 to 72 MJ AMEn per kg, and two additional feeds with the same DCP as the highest protein feed, through the addition of canola oil, Twenty birds constituted each experimental unit, with two replications of each sex being used per dietary treatment. 3. Ten birds per sex were sampled at the start of the trial and a further five per pen at the end for carcass analysis. Each carcass including feathers was ground and subsampled for water, protein and lipid determination. 4. A split-line regression described ep on the four feeds unsupplemented with additional energy with breakpoint at 60,6 MJ AME per kg DCP, maximum ep at 0,736 g per g, and a slope of 0,017. No improvement in ep resulted from supplementing the high protein feed with oil or a mixture of oil and starch, but feed intake and protein and lipid retention increased significantly. 5. The argument that insufficient energy is available to enable high protein feeds to be utilised efficiently was not corroborated by the evidence from this trial.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40201 - Animal and dairy science; (Animal biotechnology to be 4.4)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

British Poultry Science

ISSN

0007-1668

e-ISSN

0007-1668

Svazek periodika

64

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

116-121

Kód UT WoS článku

000875481900001

EID výsledku v databázi Scopus

2-s2.0-85141017173