BIO Web Conf.
Volume 33, 2021The 1st International Conference of Advanced Veterinary Science and Technologies for Sustainable Development (ICAVESS 2021)
|Number of page(s)||9|
|Section||Livestock and Food Biosafety|
|Published online||23 August 2021|
Probiotics and Herbs Combination in Commercial Feed Additives as Growth Promoter in Broiler Chicken
Veterinary Science Study Program, Faculty of Veterinary Medicine, Universitas Gadjah Mada, Jl. Fauna No. 2, Sleman, Yogyakarta
2 Departement of Microbiology, Faculty of Veterinary Medicine, Universitas Gadjah Mada, Jl. Fauna No. 2, Sleman, Yogyakarta
3 Departement of Internal Medicine, Faculty of Veterinary Medicine, Universitas Gadjah Mada, Jl. Fauna No. 2, Sleman, Yogyakarta
4 Depertement of Pathology, Faculty of Veterinary Medicine, Universitas Gadjah Mada, Jl. Fauna No. 2, Sleman, Yogyakarta
* Corresponding author: firstname.lastname@example.org
The prohibition on the use of Antibiotic Growth Promoter (AGP) causes the use of probiotics, herbs, enzymes and organic acids as an alternatives to AGP. This study aimed to determine the role of combination of probiotic and herbs in commercial feed additives on broiler performance. Sixty day-old male broiler were divided into 3 groups where each group consisted of 20 chickens with 4 replication each group. Group I was given commercial feed, group II was given commercial feed + AGP and group III was given commercial feed + combination of probiotics, herbs, enzymes and organic acids. All chickens were kept for 5 weeks. Body weight gain (BWG), body weight (BW) and Feed Convertion Ratio (FCR) were calculated every week. Carcass percentage was calculated at week 5. The results obtained from BWG and BW on group III at weeks 4 and 5 weeks were higher and significant difference (P<0.05) compared to groups I and II. The percentage of carcasses between groups did not have a significant difference (P>0.05). FCR values in group III from week 1 to weeks 5 were lower than groups I and II. The use of combination of probiotics, herbs, enzymes and organic acids has proven to have a good role on broiler performance so that it can replace AGP as a feed additive on broiler.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Feed additives are ingredients that are mixed in the livestock feed which can affect health, productivity and nutritional conditions of livestock animals. In the recent decades, antibiotics have been commonly used as the feed additives. Antibiotics are added to animal feed can improve livestock performance, but have negative effects such as residues in tissues, antimicrobial resistance and cross resistance in antimicrobial therapy .
The World Health Organization (WHO) through the Global Strategy for Containment of Antimicrobial Resistance prohibits the use of Antibiotic Growth Promoter (AGP) as an effort to minimize the incidence of antibiotic resistance. The strategy is aimed at governments to take measures to ban the use of antibiotics as a growth promoter in livestock feed. The Indonesian government through the Minister of Agriculture Regulation of the Republic of Indonesia Number 14/PERMENTAN/PK.350/5/2017 has officially prohibited the use of AGP for animal feed additives whose products are consumed by humans. Therefore, nowadays there are a lot of research focused on finding alternatives to antibiotics that are safe and do not have bad side effects .These alternative substitutes for AGP such as probiotics, herbs, enzymes and organic acids both independently or in combination.
Probiotics are nonpathogenic living organisms present in some foods which have positive effects on the health of the hosts if they enter the body in sufficient amounts . Probiotics are often combined with several types of feed additives such as enzymes and organic acids. Probiotics, herbs, enzymes and organic acids independently have a good effect on broiler performance such as increase digestive enzyme activity in the gut, nutrient digestibility, villi height, weight gain, carcass percentage and decrease FCR value [4-10].
Probiotics, herbs, enzymes and organic acids independently have a positive effect on performance, therefore a combination of feed additives is needed in order to get the maximum effect. Several previous studies in vivo using a combination of probiotics, prebiotics and organic acids  and a combination of probiotics, prebiotics and enzymes  revealed that the feed additives combination had a synergistic effect and could improve broiler performance. In vivo studies using combination of probiotic and herbal simultaneously are still rare, but in vitro studies conducted by Prakasita et al.  has proven that the combination of probiotics and herbs has a synergistic effect where the administration of media containing extracts from curcuma, red ginger and turmeric can support the growth of probiotics (Lactobacillus acidophilus and Lactobacillus brevis). Therefore, it is necessary to conduct in vivo study using a combination of probiotics, herbs, enzymes and organic acids. This study therefore aimed to determine the role of probiotics, herbs, enzymes and organic acids combination on broiler performance.
This study was approved by the Commission of Ethical Clearance Faculty of Veterinary Medicine, Gadjah Mada University (0014/EC-FKH/Int./2019).
A total of 60 day-old male broilers chickens (Lohmann strain) were divided randomly into 3 groups, where each group consisted of 20 chickens with 4 replication. Each replication was placed in one flock. Group I was a control group that was given basal feed, group II was given a mixture of basal feed and AGP (enramycin) at a dose of 250 gr/ton (based on the recommended dosage of commercial products) and group III was given a mixture of basal feed and commercial feed additives (combinations of probiotic, herbal, enzyme and organic acid) at a dose of 3 kg/ton. The combination of probiotic, herbal, enzyme and organic acids is available in the form of PromixTM commercial feed additives with the composition of the each microbial 6.2 x 108 CFU/g (Bacillus subtillis, Bifidobacterium bifidum, Bifidobacterium longum, Lactobacillus acidophilus, Saccharomyces cereviciae), 3% herbal mix (Zingiber officinale, Curcuma xanthorrhiza, C. domestica, Kaempferia galanga), enzymes (proteolytic, amylolytic, lipolytic, cellulolytic) and organic acids (lactic acid and acetic acid). PromixTM compositions are based on a composition table listed on the product packaging.
The chickens were maintained and treated for 5 weeks. All chickens were vaccinated on day 1 with live ND + IB vaccine (spray), live IBD (subcutaneous) and ND killed (subcutaneous) and booster vaccine was given on day 18 with live ND vaccine (intraocular). Maintenance was carried out at the Center of Innovation and Agrotechnology UGM. Group division was done by dividing the chickens into 12 pens. Each pen consists of 5 individuals. Feeding was carried out in ad libitum. The commercial feed used was an AGP-free basal feed. The composition of basal feed can be seen in Table 1 (basal feed composition is obtained from the commercial feed composition table and according to nutritional requirements for broiler chickens). The drinking water was provided using chlorinated water at a dose of 2-5 ppm.
Nutritional content of basal feed
Body weight (BW) were calculated every week from week 1 to week 5. From BW data obtained, then body weight gain (BWG) were calculated with formula BWGn = BWn BWn-1. All chicken were weighed individually and then averaged as a group value. Chicken weighing was done in the morning before being given food and drinking water. Feed Conversion Ratio (FCR) was calculated every week from week 1 to week 5 by dividing total feed consumption by total body weight every week. The total feed consumption and total body weight were measured at the same time by each group. Five chickens were taken randomly from each group at week 5 and then slaughtered to calculate the carcass percentage. The carcass percentage is the percentage of the carcass weight of the life weight of the chicken.
Data on weight gain, body weight and carcass percentage were analysed using the One-Way ANOVA test on statistical program (SPSS 24). If significant differences were found, the test would be continued with the Duncan’s test to find out the difference in mean value between groups. The data would be presented in the form of mean ± standard deviation (Mean ± SD). The significant level used is P<0.05.
Based on the data obtained (Table 2), there was no significant difference (P≥0.05) of BWG from the week 1 to the week 3 between groups. In the week 4, group III had a higher BWG and significant difference (P≤0.05) compared to groups I and II. In the week 5, group III had a higher BWG and significant difference (P≤0.05) compare to group I. There was no significant difference (P≥0.05) of BW between groups starting from week 1 to week 3. Significant differences are observed in the week 4 and week 5. In the week 4, group III had higher BW and significant difference (P≤0.05) compared to groups I and II. The same results also occurred at week 5 where group III had a higher BW and significant difference (P≤0.05) compared to groups I and II (Table 2).
Previous studies have proven that the use of probiotics (B. subtilis) , herbs (Z. officinale and Allium sativum) , enzymes (xylanase, β-glucanase, invertase, protease, cellulase, amylase, mannanase)  as well as organic acid (fumaric acid, citric acid and malic acid)  can increase BWG and BW in broilers. Broilers in group III was given a combination of herbal probiotic enzymes and organic acids, its BWG and BW were higher than other group because the feed additives can increase nutrient digestibility and absorption , increase digestive enzyme activity  and modulating immune system in the digestive tract .
Significant differences in BW and BWG between groups can be seen in the week 4 and week 5, where group III has a higher BW and BWG than groups I and II. This shows that feed additives already have a positive effect. The positive effect is due to the mechanism of action of feed additives such as probiotics, herbs, enzymes and organic acids can increase nutrient digestibility, absorption, and increase digestive enzyme activity. In addition, it is also caused by the growth of intestinal villi in broiler chickens that have been maximized at the age of 4 weeks so that the absorption of nutrients from the feed consumed can be maximized .
Body weight (BW) and body weight gain (BWG) between groups from week 1 to 5
There was no significant difference (P≥0.05) of the carcass percentage at week 5 between groups (Table 3). The carcass percentage between groups is in the range of 69.51% 69.56%. Although the results of BW and BWG data show a significant difference, but in the carcass percentage data there is no significant difference. The results of this study are similar to studies which were conducted by several researchers who used herbs (cinnamon oil) and organic acids (sodium butyrate) combination , herbs (Z. officinale) and probiotics (L. acidophilus, L. casei , E. faecium and B. thermophilum) combination  and organic acids (formic acid and propionic acid) herbs (Origanum onites, Syzygium aromaticum, Cuminum cyminum)  in broiler feed did not effect on carcass percentage. The results of this study are supported by research conducted by  who revealed that the use of probiotics (Bacillus subtilis) in broiler feed had a significant effect on body weight but did not significantly influence the carcass percentage. Furthermore, although no significant effect on carcass percentage overall but significantly affect the percentage of the chest muscle. This shows that although there is no effect on the overall carcass weight, but there is the possibility of giving feed additives can affect the carcass pieces.
Carcass percentage between groups at week 5
Group III from week 1 to week 5 have a lower FCR value compared to groups I. Group III have a lower FCR value at week 1, week 2, week 4 and week 5 compared to groups II. At week 1 up to week 3, BW and BWG is not significant different beetwen groups, but FCR is significant different, it shows that group III has better feeding efficiency compared to groups I and II. A low FCR value showed that the food consumed is efficiently utilized to increase body weight (Figure 1).
Similar results were also obtained from several previous studies that used probiotics, herbs, enzymes and organic acids supplements both independently and in combination. Research using enzymes (phytase, xylanase, amylase and protease) and probiotics (B. amyloliquefaciens) in broiler feed revealed that the use of enzyme both independently or in combination with probiotics can decrease FCR value compared to control group . The study using probiotics and citric acid combination revealed that the use of combination a probiotics and organic acids significantly decrease FCR values compared to control group . A good FCR values in the group given a combination of probiotics, herbs, enzymes and organic acids are due to the feed additives used can increase cellulase enzyme activity, crude fibre and dry matter digestibility [17,18,24].
The results of this study in the form of good performance indicate that the feed combination used has a synergistic effect. This synergistic effect focuses on probiotics and herbs which are the ingredients of the feed additives used. Several previous studies have also proven that herbs added to yogurt can maintain viability of probiotic bacteria (L. Bulgaricus and L. acidophilus) for 29 days of storage . The results of this studies show that in fact, probiotics and herbs have a synergistic effect in which herbs can act as probiotics which can be a source of nutrition for probiotic bacteria. The carbohydrate content of herbal extracts can act as a substrate for bacterial growth. Besides that, the content of polyphenols in herbal extracts has high antioxidant activity against free radicals and oxidative stress arising from metabolic activity and can support the growth of probiotic bacteria by providing a microaerophilic environment .
Feed Conversion Ratio each groups from week 1 to week 5.
The combination of probiotic and herbs in commercial feed additives PromixTM has a synergistic effect and good role on growth performance of broiler such as increasing BWG, BW and decreasing FCR value so that it can replace AGP as a feed additives in broilers.
The writers would like to express gratitude to the head office of the Center of Innovation and Agrotechnology UGM who has granted us the permission to use chicken coops to conduct research for 5 weeks. Thanks also goes to drh. Agnes Heratni, MP who has prepared feed additives.
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