Improvement in broiler performance by feeding a nutrient-dense diet after a mild feed restriction

Background: The use of early nutrient-restriction programs in broilers can prevent complications such as increased body fat deposition and its consequences. However, feed restriction not always gives the expected results. Objective: To assess the effect of two levels of feed restriction followed by a re-alimentation period with five increasing nutrient levels on growth performance and immune response of broiler chickens. Methods: A total of 330 animals were used. The treatments were: 25 (T25) and 35% (T35) quantitative feed restriction during the starting period, and 0, 2.5, 5, 7.5, 10, and 15% increased energy and protein contents during the growing and finishing periods. Results: For all the T25 treatments, except for T25-0, feed intake (FI) and body weight gain (BWG) were higher, and feed conversion rate (FCR) was lower (p<0.05) compared to the control treatment. In that group, the response of FI and BWG to the increased nutrient density was mostly quadratic (p<0.001), whereas that of FCR was linear (p<0.001). The FI and BWG results were less homogeneous in the T35 treatments, but FCR was lower compared to the control treatment (p<0.05) in all of them. The FCR showed no differences (p>0.05) between treatments during the finishing period. Conclusion: Feeding a nutrient-dense diet after a period of mild feed restriction gives the best results, while increasing nutrient density after a more severe feed restriction does not improve productive results compared to a standard diet. Carcass traits and immune function were not affected by restriction level or nutrient density.

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Effect of different level of rosemary leave powder in diet on blood metabolites, carcass characteristics and broiler performance

Veterinary Science Development ◽

10.4081/vsd.2018.6935 ◽

2018 ◽

Vol 8 (1) ◽

Author(s):

Mojtaba Roudgar Amoli ◽

Kaveh Jafari Khorshdidi ◽

Mohammad Jafari

Keyword(s):

Feed Intake ◽

Broiler Chickens ◽

Body Weight Gain ◽

Carcass Traits ◽

Broiler Chicks ◽

Feed Conversion ◽

Broiler Performance ◽

And Performance ◽

Experimental Treatments ◽

Broiler Feed

This experiment was conducted to investigate the effect of rosemary powder in diet on blood metabolite and performance of broiler chickens. 180 one day broiler chicks were distributed in a completely randomize design with 4 treatments and 3 replicates and 15 bird in each. Experimental treatments were included: Control (without additive), 0.05, 0.1 and 0.2 percent of rosemary in diet. In 42 day of age one bird from each replicate was selected and slaughtering for carcass traits. The results were sowed use of 0.05 percent of rosemary could be significantly increased feed intake of broiler in starter period (p<0.05). Also use of 0.1 percent of rosemary caused to significantly increase broiler body weight gain in overall of rearing period than 0.2 percent group (p<0.05). Use of 0.1 percent rosemary in diet had a significantly feed conversion ratio (FCR) than T4 (0.2% rosemary). Experimental treatments had no significant effect on carcass traits, except in liver percent weight, which had significantly higher in T2 group (p<0.05). Also experimental treatments had no significant effect on glucose, cholesterol, triglyceride level of broiler chickens in 42 day of age. The results of this experiment showed use of rosemary powder could be improved broiler feed intake in starter period.

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The effect of severity and duration of early feed restriction on feed intake, body weight gain and feed conversion ratio of male broiler chickens

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200013399 ◽

2003 ◽

Vol 2003 ◽

pp. 180-180

Author(s):

H. Jahanian Najafabadi ◽

A. Golian ◽

F. Eftekhari Shahroudi

Keyword(s):

Body Weight ◽

Weight Gain ◽

Feed Intake ◽

Broiler Chickens ◽

Body Weight Gain ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Metabolic Energy ◽

Feed Restriction ◽

Feed Conversion

One method of reducing feed cost is to restrict the feed in the early life of broilers. In this regard, Fontana et al. (1992) reported that early feed restriction programs in their experiments proportionally reduced the consumption of the starter diets by an average of 22% in restricted broilers when compared with controls. Energy restriction has also been shown to result in a reduction in metabolic energy loss leading to a reduced requirement for maintenance. If during refeeding, this low requirement is maintained and if growth resumed at a normal or above normal rate (compensatory growth), feed efficiency would be substantially improved, leading to an economical advantage. This experiment was conducted to determine the effect of severity of diet dilution (energy and protein) and duration of early feed restriction on feed intake (FI), body weight gain (BWG) and feed conversion ratio (FCR) of male broiler chickens.

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IMPROVED FEEDING VALUE OF SASKATCHEWAN-GROWN BARLEY FOR BROILER CHICKENS WITH DIETARY ENZYME SUPPLEMENTATION

Canadian Journal of Animal Science ◽

10.4141/cjas88-140 ◽

1988 ◽

Vol 68 (4) ◽

pp. 1253-1259 ◽

Cited By ~ 37

Author(s):

H. L. CLASSEN ◽

G. L. CAMPBELL ◽

J. W. D. GROOTWASSINK

Keyword(s):

Body Weight ◽

Feed Efficiency ◽

Broiler Chickens ◽

Body Weight Gain ◽

Dietary Treatment ◽

Chick Growth ◽

Mixed Feed ◽

Broiler Performance ◽

Nutrient Density ◽

Feeding Value

Nine barley samples representative of cultivars grown throughout Saskatchewan were fed with dietary β-glucanase supplementation (Aspergillus niger) as mixed feed to broiler chickens. Experiment 1 compared barley diets with or without enzyme addition for broilers from 0 to 21 d, while exp. 2 involved comparison of broiler performance to market weight (0–42 d) when fed enzyme-supplemented barley diets or a wheat/corn-based diet. In exp. 1, chicks fed barley diets with the enzyme additive gained more weight and converted feed more efficiently than those given diets without the enzyme (P < 0.01). Variability among barley diets, as indicated by chick growth and feed efficiency, was reduced by the addition of the enzyme. In exp. 2, broilers consuming barley with dietary enzyme were lighter than their wheat/corn-fed counterparts at 21 and 42 d (P < 0.05). Body weight gain from 21 to 42 d was not significantly affected by dietary treatment. Feed-to-gain ratio was higher for barley-fed broilers (P < 0.05) in comparison to birds fed the wheat/corn diet, reflecting the lower nutrient density of the barley diets. Key words: Broiler chickens, barley, β-glucanase

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A Research on the Comparative Effect of Active Dry Yeast and Inactivated-Stabilized Probiotic Yeast (Thepax) Added at Different Levels to Diets on Broiler Performance

Turkish Journal of Agriculture - Food Science and Technology ◽

10.24925/turjaf.v9i12.2219-2225.4488 ◽

2021 ◽

Vol 9 (12) ◽

pp. 2219-2225

Author(s):

Süleyman Çalışlar ◽

Rahmi Kanat

Keyword(s):

Broiler Chickens ◽

Body Weight Gain ◽

Live Weight ◽

Abdominal Fat ◽

Carcass Weight ◽

Feed Consumption ◽

Control Group ◽

Feed Conversion ◽

Broiler Performance ◽

Different Levels

This experiment was conducted to determine the effect of active yeast (AY) and inactive-stabilized yeast (Thepax) supplementation to the rations in different levels on broiler performance. In the experiment carried out according to the randomized plot design, there were 5 different treatment groups as control group (Group 1), 0.1% Thepax (Group 2), 0.2% Thepax (Group 3), 0.1% AY (Group 4) and 0.2% AY (Group 5). In the experiment, the effects of active and inactive yeasts on body weight gain (BWG), feed consumption, feed conversion rate, carcass weight (CW), carcass yield (CY), abdominal fat amount and mortality were investigated. In the present experiment, the final live weight, the cumulative feed consumption and feed conversion were insignificant. The statistical difference between the groups in the experiment was significant in carcass weight, but insignificant in the amount of abdominal fat and mortality rate. Inactive-stabilized yeast (Thepax 0.1%) was more effective than 0.2% AY on BWG. Only 0.1% Thepax increased the CW besides CY was high in 0.1%, 0.2% Thepax and 0.1% AY groups. It has been observed that active and inactive yeasts are used in broiler chickens without any problem.

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Impaired Performance of Broiler Chickens Fed Diets Naturally Contaminated with Moderate Levels of Deoxynivalenol

Toxins ◽

10.3390/toxins13020170 ◽

2021 ◽

Vol 13 (2) ◽

pp. 170

Author(s):

Regiane R. Santos ◽

Ellen van Eerden

Keyword(s):

Activated Charcoal ◽

Broiler Chickens ◽

Body Weight Gain ◽

Experimental Unit ◽

Feed Conversion ◽

Broiler Performance ◽

Impaired Performance ◽

Intestinal Segments ◽

Intestinal Morphometry ◽

Maximum Threshold

Mycotoxin exposure is common in the poultry industry. Deoxynivalenol (DON) is usually detected at levels below the maximum threshold (5000 ppb), but depending on diet and age, broiler performance can be affected. We evaluated the effects of 900 ppb and 2300 ppb DON on the performance, intestinal morphometry, and lesion scores of broiler chickens. One-day-old male Ross broilers (n = 736) were divided into 4 treatments with 8 replicates each, and a pen containing 23 birds was the experimental unit. The animals were fed diets naturally contaminated with two levels of DON: 900 (Low DON—LD) or 2300 (Moderate DON—MD) ppb, with or without activated charcoal, over 28 days. After this, all birds were fed a marginally DON-contaminated diet without charcoal. During the first 28 days, body weight gain (BWG) and feed conversion ratio (FCR) were significantly impaired when broilers were fed a MD diet without activated charcoal. Even after feeding a marginally contaminated diet from D28–35, birds previously fed the MD diet presented a significantly lower performance. The villus height:crypt depth (VH:CD) ratio was significantly higher in the ileum from 14-day-old broilers fed the MD when compared with the LD diet. At D28, the MD diet caused decreased villus height (VH) and increased crypt depth (CD), affecting VH:CD ratio in both intestinal segments, with higher levels in the jejunum from 28-day-old broilers fed a non-supplemented LD diet. Broiler production was negatively affected by DON, even at moderate levels (2300 ppb).

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Influence of a combination of formic and propionic acids added to wheat- and barley-based diets on the performance and gut histomorphology of broiler chickens

Acta Veterinaria Hungarica ◽

10.1556/avet.55.2007.4.7 ◽

2007 ◽

Vol 55 (4) ◽

pp. 479-490 ◽

Cited By ~ 14

Author(s):

N. Senkoylu ◽

H. Samli ◽

M. Kanter ◽

Aylin Agma

Keyword(s):

Broiler Chickens ◽

Body Weight Gain ◽

Dietary Treatment ◽

Control Group ◽

Broiler Chicks ◽

Feed Conversion ◽

Villus Height ◽

Nutrient Density ◽

Dietary Treatments ◽

Different Levels

Day-old male chicks were used to test the effects of a combination of formic and propionic acids (CFP) added to wheat- and barley-based diets on the performance and gut histomorphology of broilers. The CFP, containing formic and propionic acids based on an inorganic phyllo-silicate carrier, was added to starter and grower broiler diets of standard (NRC, 1994) or lower nutrient density (LND) using different levels of wheat and barley. Body weight gain (BWG) and feed conversion ratio (FCR) of broiler chicks were significantly (P < 0.001) improved by CFP supplementation at 21 days of age regardless of nutrient density (ND). However, at 35 days of age CFP addition significantly (P < 0.001) increased BWG and FCR. Proventriculus weight was also significantly affected by the dietary treatments. Ileal viscosity was significantly (P < 0.05) affected by ND which was associated with wheat and barley contents, whereas feed viscosity was significantly (P < 0.05) affected by CFP supplementation. Villus height was significantly (P < 0.05) increased by the CFP supplementation. In the case of villus width, an interaction effect was observed: there was a significant (P < 0.05) decrease in the group fed the standard ND diet, but only a numerical decrease in the group fed the LND diet compared to control group. No significant effect of dietary treatment on the thickness of the lamina muscularis mucosae could be detected.

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PENGARUH PENGGANTIAN SEBAGIAN JAGUNG DENGAN SILASE KULIT PISANG KEPOK (Musa paradisiaca formatypica) DALAM RANSUM TERHADAP PERFORMANS AYAM BROILER

ZOOTEC ◽

10.35792/zot.38.1.2018.19138 ◽

2018 ◽

Vol 38 (1) ◽

pp. 244

Author(s):

Alfian Y. Nuraga ◽

Florencia N. Sompie ◽

Youdhie H. S. Kowel ◽

Mursye N. Regar

Keyword(s):

Broiler Chickens ◽

Body Weight Gain ◽

Feed Consumption ◽

Partial Replacement ◽

Feed Conversion ◽

Broiler Performance ◽

Yellow Corn ◽

Randomized Design ◽

Completely Randomized Design ◽

Experimental Treatments

UTILIZATION OF ENSILAGE KEPOK BANANA PEELS REPLACING PART OF CORN IN THE DIET ON BROILER PERFORMANCE. The study was conducted to determine the extent of the effect of partial replacement of corn with ensilage kepok banana peels in the ration on broiler performance. This study uses a 60 head broiler unsexed strains Cobb age of 1 day. The study design used completely randomized design (CRD), which consists of 4 treatments and 5 replications. The composition of experimental treatments in part the following: R0 = 50% of yellow corn and 0% ; R1 = 42.5% of yellow corn and 7.5% ; R2 = 35% of yellow corn and 15% ensilage kapok banana peels ; R3 = 27.5% of yellow corn and 22.5% ensilage kepok banana peels . The results showed that the treatment effect highly significant (P <0.01) on feed consumption, significantly different (P <0,05) on body weight gain and feed conversion. Based on the results it was concluded that the ensilage kapok banana peels can replace yellow corn up to 45% or used in the ration of broiler chickens up 22.5%. Keywords:,Broiler, ensilage kepok banana peels, Performance.

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Enhancing the Productive Performance of Broiler Chickens by Adding Spirulina platensis Compared with Probiotic, Prebiotics, and Oxytetracycline

The Iraqi Journal of Veterinary Medicine ◽

10.30539/ijvm.v45i1.1037 ◽

2021 ◽

Vol 45 (1) ◽

pp. 31-36

Author(s):

Wisam R Atiyah ◽

Mohanad F Hamood

Keyword(s):

Drinking Water ◽

Body Weight ◽

Weight Gain ◽

Feed Intake ◽

Spirulina Platensis ◽

Broiler Chickens ◽

Body Weight Gain ◽

Feed Conversion ◽

Live Body Weight ◽

Feed Conversion Rate

This study was conducted in order to find out the effect of Spirulina platensis (S. platensis) algae mixed with drinking water (2%) on the production performance of broiler chickens infected with or without Enterococcus faecalis (E. faecalis) and compare it with the effects of probiotics (containing Lactobacillus acidophilus, L. casi, L. reuteri, and Bacillus subtillis), prebiotics (containing antioxidants and a group of vitamins) as well as oxytetracycline. The experiment included 350 one day old (Ross-308) broiler chicks, randomly divided into 7 groups by 50 chicks per group for 35 days. The groups were divided as follows: T1: infected experimentally with E. faecalis only, T2: treated with S. platensis, T3: infected experimentally with E. faecalis and treated with 2% S. platensis, T4: infected experimentally with E. faecalis and treated with probiotic, T5: infected experimentally with E. faecalis and treated with prebiotic, T6: infected experimentally with E. faecalis and treated with oxytetracycline. T7: control group without any addition. Weekly live body weight and weekly body weight gain were measured as well as weekly feed intake and feed conversion rate for broiler chickens were estimated. The current study proved that S. platensis algae added to drinking water (2%) in T2 and T3 groups had caused a significant increase (P<0.05) in the weekly live body weight and weekly body weight gain, Spirulina also caused a significant decrease (P<0.05) in weekly feed intake and feed conversion rate for broiler chickens. Therefore, S. platensis could be a suitable alternative to some feed additives such as probiotics, prebiotics, and antibiotics in addition to the ability of Spirulina to reduce the symptoms of E. faecalis.

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Supplementing Garlic Nanohydrogel Optimized Growth, Gastrointestinal Integrity and Economics and Ameliorated Necrotic Enteritis in Broiler Chickens Using a Clostridium perfringens Challenge Model

Animals ◽

10.3390/ani11072027 ◽

2021 ◽

Vol 11 (7) ◽

pp. 2027

Author(s):

Doaa Ibrahim ◽

Tamer Ahmed Ismail ◽

Eman Khalifa ◽

Shaimaa A. Abd El-Kader ◽

Dalia Ibrahim Mohamed ◽

...

Keyword(s):

Growth Performance ◽

Clostridium Perfringens ◽

Broiler Chickens ◽

Body Weight Gain ◽

Economic Benefits ◽

Production Costs ◽

Broiler Chicks ◽

Necrotic Enteritis ◽

Feed Conversion ◽

Intestinal Lesion

Necrotic enteritis (NE) caused by Clostridium perfringens (C. perfringens) results in impaired bird growth performance and increased production costs. Nanotechnology application in the poultry industry to control NE outbreaks is still not completely clarified. Therefore, the efficacy of dietary garlic nano-hydrogel (G-NHG) on broilers growth performance, intestinal integrity, economic returns and its potency to alleviate C. perfringens levels using NE challenge model were addressed. A total of 1200 male broiler chicks (Ross 308) were assigned into six groups; four supplemented with 100, 200, 300 or 400 mg of G-NHG/kg diet and co-challenged with C. perfringens at 21, 22 and 23 d of age and two control groups fed basal diet with or without C. perfringens challenge. Over the total growing period, the 400 mg/kg G-NHG group had the most improved body weight gain and feed conversion efficiency regardless of challenge. Parallel with these results, the mRNA expression of genes encoding digestive enzymes (alpha 2A amylase (AMY2A), pancreatic lipase (PNLIP) and cholecystokinin (CCK)) and intestinal barriers (junctional adhesion molecule-2 (JAM-2), occludin and mucin-2 (Muc-2)) were increased in groups fed G-NHG at higher levels to be nearly similar to those in the unchallenged group. At 14 d post challenge, real-time PCR results revealed that inclusion of G-NHG led to a dose-dependently decrease in the C. perfringens population, thereby decreasing the birds’ intestinal lesion score and mortality rates. Using 400 mg/kg of G-NHG remarkably ameliorated the adverse effects of NE caused by C. perfringens challenge, which contributed to better growth performance of challenged birds with rational economic benefits.

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Enterococcus faecium PNC01 isolated from the intestinal mucosa of chicken as an alternative for antibiotics to reduce feed conversion rate in broiler chickens

Microbial Cell Factories ◽

10.1186/s12934-021-01609-z ◽

2021 ◽

Vol 20 (1) ◽

Author(s):

Yang He ◽

Xuan Liu ◽

Yuanyang Dong ◽

Jiaqi Lei ◽

Koichi Ito ◽

...

Keyword(s):

Epithelial Cells ◽

Intestinal Mucosa ◽

Conversion Rate ◽

Broiler Chickens ◽

Intestinal Epithelial Cells ◽

Relative Length ◽

Intestinal Epithelial ◽

Feed Conversion ◽

Broiler Production ◽

Feed Conversion Rate

Abstract Background The development and utilization of probiotics had many environmental benefits for replacing antibiotics in animal production. Bacteria in the intestinal mucosa have better adhesion to the host intestinal epithelial cells compared to bacteria in the intestinal contents. In this study, lactic acid bacteria were isolated from the intestinal mucosa of broiler chickens and investigated as the substitution to antibiotic in broiler production. Results In addition to acid resistance, high temperature resistance, antimicrobial sensitivity tests, and intestinal epithelial cell adhesion, Enterococcus faecium PNC01 (E. faecium PNC01) was showed to be non-cytotoxic to epithelial cells. Draft genome sequence of E. faecium PNC01 predicted that it synthesized bacteriocin to perform probiotic functions and bacteriocin activity assay showed it inhibited Salmonella typhimurium from invading intestinal epithelial cells. Diet supplemented with E. faecium PNC01 increased the ileal villus height and crypt depth in broiler chickens, reduced the relative length of the cecum at day 21, and reduced the relative length of jejunum and ileum at day 42. Diet supplemented with E. faecium PNC01 increased the relative abundance of Firmicutes and Lactobacillus, decreased the relative abundance of Bacteroides in the cecal microbiota. Conclusion E. faecium PNC01 replaced antibiotics to reduce the feed conversion rate. Furthermore, E. faecium PNC01 improved intestinal morphology and altered the composition of microbiota in the cecum to reduce feed conversion rate. Thus, it can be used as an alternative for antibiotics in broiler production to avoid the adverse impact of antibiotics by altering the gut microbiota. Graphic Abstract

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