نتایج جستجو برای: 13 birds per replicate pen

تعداد نتایج: 801106  

Journal: Poultry Science Journal 2016

This study was conducted to investigate the effects of dietary influence of aspirin on growth performance, antioxidant status and mortality in the broilers subjected to cold-induced ascites. A total six hundred 1-d old male broilers (Ross, 308) were randomly allotted to four treatment groups, with five replicate pens per treatment and 30 birds each. The experimental groups were kept in a cold c...

محمدباقری, نسیبه, نجفی, رامین,

An experiment was conducted to evaluate the effects of organic acids and phytase enzyme supplementation on immune system and carcass characteristics of broiler chickens. The experiment was done in factorial arrangement 2×2×2 based on completely randomized design with 8 treatments, 5 replicates and 12 chicks in each to 42 d of age. Diets including natural vinegar (0 and 2%), citric acid (0 and 1...

2014
A. E. Murakami C. Eyng J. Torrent

The objective of the present study was to investigate the effects of a mixture of functional oils (Essential, Oligo Basics Agroind. Ltda) on performance response of chickens challenged with coccidiosis and the determination of apparent metabolizable energy (AME), nitrogen-corrected apparent metabolizable energy (AMEn), the coefficients of protein and ether extract digestibility and intestinal m...

Journal: :Poultry science 2003
L J Keeling I Estevez R C Newberry M G Correia

Laying hens were reared from 1 d of age in four replicates each of four different group sizes: 15, 30, 60, and 120 birds. To maintain stocking density at a constant 5 birds/m2, they were housed in litter floor pens of 3, 6, 12, and 24 m2, respectively. The allocation of feeder space, drinker nipples, and perch space was also constant per bird, irrespective of group size, as was the arrangement ...

محمدرضا اکبری, , حسن کرمانشاهی, , غلامعلی کلیدری, ,

This experiment was conducted to evaluate the effects of adding acetic acid to drinking water on the performance and ileal microorganisms of broiler chickens. In a completely randomized design with 5 treatments and 5 replicates, 300 day-old commercial mail broiler chicks (ROSS) were divided into 25 groups, 12 chicks per group. Each of the five levels of acetic acid added to drinking water (0.0,...

Mohammad Houshmand Siamak Parsaei, Zahra Amini

This experiment was conducted to investigate the effects of olive leaf (OL) on immune response and some blood metabolites of broiler chickens. A total of 400 one-day-old broiler chicks (male and female) were randomly assigned to 5 experimental treatments with 4 replicates of 20 birds each. Birds of different treatments were given diets containing 0, 0.25, 0.5, 0.75 and 1% OL powder from 14 to 4...

Journal: :Journal of animal science 1995
K G Friesen J L Nelssen R D Goodband M D Tokach J A Unruh D H Kropf B J Kerr

One hundred fourteen high-lean growth gilts (72.5 kg BW) were used to determine the apparent digestible lysine requirement for maximum growth performance and carcass protein deposition rate from 72.5 to 136 kg BW. The experiment was a randomized complete block design with initial BW used to establish blocks. Six dietary treatments were included, ranging from .44 to .94% (.10% increments) appare...

2004
C. W. Hastad J. L. Nelssen R. D. Goodband M. D. Tokach S. S. Dritz J. M. DeRouchey N. Z. Frantz

Recent studies have shown that dried distiller’s grains with solubles (DDGS) has an ME value similar to that of corn, but pigs fed diets with DDGS have a lesser feed intake than do those fed corn. We conducted three studies to evaluate the effects of DDGS on palatability and feed intake of growing pigs. In Exp. 1, 90 gilts (initially 58.2 lb) were used to evaluate the effects of a diet based on...

Journal: :Journal of animal science 1991
B L Gwartney C R Calkins S J Jones

To examine the effects of cimaterol (CIM) and its withdrawal on meat tenderness and carcass composition, 21-d-old broiler chickens (n = 288) were randomly assigned to one of nine treatments. For Treatments 1 through 6, birds were fed a control diet or a diet containing 1 ppm CIM until slaughter at 35, 42, or 49 d of age. Treatments 7 and 8 consisted of birds fed the CIM diet for 14 d and then w...

Journal: :Frontiers in animal science 2021

Genetic selection for fast growth rate and high breast muscle yield in modern broilers has unintended effects on animal welfare behavior, namely terms of inactivity leg disorders. We hypothesized that exercise stimulated through environmental enrichment could positively stimulate pen-wide activity improve bird welfare. The study objectives were to implement a laser device motivate active feedin...

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