1. Introduction
Intensive broiler production exposed the birds to several stressors, such as environmental factors, crowding and vaccination. However, when free radical is higher than physiological tolerance cause oxidative stress ( 1 ). Oxidative stress is a factor that induces several diseases (inflammation, diabetes, skin lesions and neurological diseases) ( 2 ) and reduce growth, Immune suppression and increase lipid peroxidation ( 3 ), Synthetic antioxidant (BHA and BHT) is important phenolic compound to stabilize the feed, but natural antioxidant has become the focus for protecting the feeds ( 4 ). Grapes (Vitis vinifera) are rich sources of polyphenol compounds, which exert antioxidant, anti-inflammatory and antibacterial activity ( 5 ) immunostimulant ( 6 ). It has been shown that grape by-products improve the ecosystem of intestinal microflora of birds. Viveros, Chamorro ( 7 ) reported that dietary polyphenol products might be effective for beneficial bacteria growth, which resulted in growth performance. El-Damrawy ( 8 ) reported that supplementing the broiler diet with grape extracts lower plasma lipid concentration and enhances antioxidant and immunostimulant status ( 6 ). Therefore, the present study was designed to investigate the effect of supplementing different levels of grape seed powder to a broiler diet on productive performance, lipid profile and bacterial count of the duodenum and cecum.
2. Materials and Methods
2.1. Study Design
This study was conducted to study the effect of adding different levels of grape seed powder to a broiler diet on productive performance, lipid profile and microbial bacteria in the duodenum and ceca. A total of 180 unsexed (Ross 308) broiler chicks were randomly distributed to four dietary treatments with three replicate pens/treatments (15 birds/pen): Treatments were as follows, T1: control; T2; T3; and T4 were feed 1, 2, 3% grape seed powder in their diets, from 1-42 days of age. Table 1 shows the chemical composition of the diet according to National Research Council ( 9 ). Average live weight, accumulative weight gain, feed consumption and feed conversion ratio were measured at 21 and 42 days. At 42 days of age, blood samples were randomly taken from 3 birds/treatment with equal average body weight. Glucose concentration and high-density lipoprotein (HDL) were measured according to a method previously described by Tietz, Finley ( 10 ), and low-density lipoprotein (LHL) was measured according to a method previously described by Grundy, Cleeman ( 11 ). The triglyceride was measured according to a method previously described by Fossati ( 12 ).
Ingredients, % | Starter diets | Finisher diets |
---|---|---|
1-21 day | 22-42 day | |
Yellow corn | 51.0 | 54.0 |
Wheat | 12.5 | 11.5 |
SBM (44%) | 22.0 | 24.0 |
Protein con (40%) | 10.0 | 10.0 |
Sunflower oil | 1.5 | 1.5 |
Limestone | 0.7 | 0.7 |
NaCl | 0.3 | 0.3 |
Calculated composition of the experimental diet according to the National Research Council (9) | ||
CP (%) | 21.49 | 20.0 |
ME/kg (Kcal) | 2990.5 | 3150 |
Ca (%) | 1.43 | 1.26 |
P,ava., (%) | 0.67 | 0.57 |
Lysine (%) | 1.22 | 1.14 |
Meth+Cys (%) | 0.62 | 0.58 |
Protein conc. Provide per kg: 44% protein ; 2100 kcal ; fat 3.51%; lysine 3.90% ; 3.90% methionine+cystine ; 6% calcium; 3% available phosphorus and vitamins and mineral is which meet National Research Council (9) |
Total protein and globulin were measured according to a method previously described by King and Wootton ( 13 ) and Marshall, Lapsley ( 14 ), respectively.
Glutathione peroxidase was measured according to a method previously described by Rotruck ( 15 ). Plasma AST and ALT were measured according to a method previously described by Reitman and Frankel ( 16 ). While microbial counts were measured according to the American Public Health Association protocol ( 17 ).
2.2. Statistical Analysis
Data were analyzed according to a Randomized complete design, and significant means were compared by Duncan multiple range tests ( 18 ) and statistical analysis ( 19 ).
3. Results and Discussion
The effect of supplementing different levels of grape seed powder in the diet on productive performance is presented in table 2. Results indicated that birds consuming a diet containing 3 and 4 % grape seed had significantly (P<0.05) higher final live body weight, accumulative average gain and feed consumption than those in the control group and the animals in T2. Feeding grape seed powder has not had any significant effects on the feed conversion ratio (g. feed / g. gain) (P>0.05). Supplementation of grape seed powder at 2 and 3 % improved final body weight by 2.19% and 2.79% for T3 and T4, respectively, over the control group (T1).
From0-21 days of age | Grape seed powder % | Levels of significance | |||
---|---|---|---|---|---|
T1 (0 %) | T2 (1 %) | T3 (2 %) | T4 (3 %) | ||
Avg.body weiht (g) | 854.70±7.92b | 895.24±5.29a | 874.65±13.10ab | 902.29±9.25a | * |
Avg. gain (g) | 763.44±11.65 | 773.82±14.25 | 766.71±9.32 | 800.44±11.79 | NS |
Avg. feed intake (g) | 1183.77±11.39 | 1194±8.75 | 1190.10±12.36 | 1201.00±15.37 | NS |
Feed conversion ratio | 1.55±0.03 | 1.54±0.02 | 1.55±0.03 | 1.50±0.01 | N.S |
From 22-42 days of age | |||||
Avg.body weiht (g) | 2765.92±13.78b | 2776.25±17.30b | 2828.10±12.25a | 2845.41±15.4a | * |
Avg. gain (g) | 2712.11±10.22b | 2736.81±11.98b | 2784.48±17.71a | 2802.25±16.71a | * |
Avg. feed intake (g) | 4518±7.88b | 4525±12.17b | 4565.74±13.43a | 4585±11.02a | * |
Feed conversion ratio | 1.67±0.007 | 1.65±0.009 | 1.64±0.014 | 1.64±0.011 | NS |
a,b means *(P<0.05) N.S : Not significant |
Table 3 summarises the effect of grape seed powder supplementation on cholesterol, triglyceride, High-density lipoprotein and low-density lipoprotein concentration. Grape seed powder treatments lead to a significant (P<0.05) decrease in plasma concentration of cholesterol, triglyceride and low-density lipoprotein for treatments T3 and T4 compared with the control group (T1) and did not differ significantly from treatment T2 in plasma concentration of (TG) and (LDL). High-density lipoprotein (HDL) was significantly higher in T4 than in treatment T1, While plasma concentration of (HDL) in T4 did not statically differ compared with T2 and T3.
parameter | Grape seed powder % | Levels of significance | |||
---|---|---|---|---|---|
T1 (0 %) | T2 (1 %) | T3 (2 %) | T4 (3 %) | ||
Cholesterol | 77.29±8.32a | 62.18±8.91ab | 41.71±5.79b | 43.90±7.06b | * |
Triglycerides | 160.40±5.84a | 149.39±6.26a | 122.94±4.98b | 109.45±7.77b | * |
HDL | 78.48±5.10b | 85.96±5.62ab | 86.43±6.07ab | 96.11±4.45a | * |
LDL | 55.24±6.63a | 42.91±3.62ab | 38.73±5.13b | 32.97±4.02b | * |
a,b means *(P<0.05) |
Total aerobic bacteria and colon bacteria in the duodenum and ceca were significantly (P<0.05) decreased in T4 compared with the (T1), while total bacteria in (T4) was not (P<0.05) different compared with (T2) group. Lactobacilli spp bacteria in duodenum and ceca were significantly (P<0.05) higher in the T4 group over the control (T1), while lactobacilli spp bacteria in T4 was not significantly different compared with (T2) (Table 4).
TREATMENTS | Duodenum | Ceca | ||||
---|---|---|---|---|---|---|
Aerobic bacteria | Colon bacteria | Lactobacilli bacteria | Aerobic bacteria | Colon bacteria | Lactobacilli bacteria | |
T1 | 5.21±0.05a | 11.28±0.06a | 3.72±0.07b | 3.91±0.05a | 7.33±0.06a | 2.91±0.07b |
T2 | 5.01±0.06a | 11.19±0.10a | 3.88±0.6b | 3.77±0.06ab | 7.09±0.07ab | 2.99±0.04ab |
T3 | 4.52±0.09a | 10.81±0.09ab | 4.46±0.08a | 3.46±0.02b | 6.82±0.08a | 3.50±0.06a |
T4 | 4.37±0.10b | 10.47±0.7b | 4.69±0.09a | 3.23±0.06b | 6.99±0.10b | 3.81±0.09a |
Levels of significance | * | * | * | * | * | * |
a,b means *(P<0.05) |
Lichovnikova, Kalhotka ( 20 ) reported that the increase in lactobacilli bacteria (beneficial) and the decrease in pathogenic bacteria could be related to the antibacterial and antioxidant activity of phenolic compounds in grape seeds ( 21 ).
Table 5 showed that there was a significant (P<0.05) decrease in malondialdehyde in all experimental groups as compared with the control group (T1), while glutathioperoxidase was significantly (P<0.05) increased in T3 and T4 groups. Lipid peroxidation results from the imbalance between oxidation and antioxidant defence system ( 22 ) and impaired muscle membrane system. Malondialdehyde is a marker for lipid peroxidation ( 23 ). Flavonoids are potent antioxidants and can terminate oxidative reactions by scavenging free radicals.
parameter | Grape seed powder % | Levels of significance | |||
---|---|---|---|---|---|
T1 (0 %) | T2 (1 %) | T3 (2 %) | T4 (3 %) | ||
GSH-PX, umol/mol | 4.71±0.61b | 4.98±0.13b | 6.32±0.16a | 6.92±0.12a | * |
MDA, umol/mol | 205.24±5.87a | 176.14±3.15b | 182.89±6.04b | 167.00±5.86b | * |
a,b means *(P<0.05); GSH; glutathionperoxidase : MDA, malondialdehyde |
There was a significant (P<0.05) decrease in plasma glucose concentration (T3 and T4) as compared with the control group (T1). This decrease in glucose concentration could be due to proanthocyanidins, which have been shown to have cholesterol-lowering activity ( 24 ) (Table 6).
parameter | Grape seed powder % | Levels of significance | |||
---|---|---|---|---|---|
T1 (0 %) | T2 (1 %) | T3 (2 %) | T4 (3 %) | ||
Glucose | 241.72±12.00a | 219.81±6.11ab | 201.97±13.34b | 195.63±11.89b | * |
ALT | 19.45±0.90 | 18.75±0.39 | 17.58±0.74 | 17.11±0.57 | NS |
AST | 28.83±0.76 | 28.21±0.41 | 26.18±1.17 | 25.91±1.5 | N.S |
a,b means *(P<0.05); N.S: not significant; AST: Aspartate transaminatinase; ALT: Alnine transaminase |
Authors' Contribution
Study concept and design: A. S. N.
Acquisition of data: H. E. A.
Analysis and interpretation of data: A. H. K.
Drafting of the manuscript: A. S. N.
Critical revision of the manuscript for important intellectual content: A. S. N.
Statistical analysis: H. E. A.
Administrative, technical, and material support: A. H. K.
Ethics
All the ethical standards were approved by the ethics committee of the Al-Qasim Green University, Al Qasim, Iraq.
Conflict of Interest
The authors declare that they have no conflict of interest.
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