Poultry, Fisheries & Wildlife Sciences

Poultry, Fisheries & Wildlife Sciences
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Research Article - (2019)Volume 7, Issue 1

Comparative Efficacy of Different Chinese Herbal Extracts in Broiler Production

Atif Rehman, Xu Jingyi, Liu Shuang, Liu Fan, Chen Xiu Hong, He Shenghu* and Zhao Hong Ji
 
*Correspondence: He Shenghu, Department of Veterinary Science, College of Agriculture, Ningxia University, Ningxia Hui Autonomous Region Yinchuan, China, Tel: 008615009407407, Email:

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Abstract

The objective of current trail was to evaluate the effect of three Chinese herbal extracts (Lonicera japonica, Radix liquiritiae and Lysimachia davurica) supplementation in drinking water as alternative to antibiotics on performance and immune organs weight/index in growing broilers chicks. For this purpose, 150 day old broiler chicks were reared in floor pens and raised on commercial feed for 7 days for adaptation. After seven days, birds were distributed into five groups in such a way that each group contained 3 replicates and each replicate had 10 birds. All groups were fed commercial diet and offered water with or without additives. In control group drinking water was without any additives; In second group drinking water was supplemented with antibiotic (Flavomycin 10 ml/liter). The remaining three groups were supplemented with Lonicera japonica, Radix liquiritiae, and Codonopsis extract @ 20 ml/liter, 15 ml/liter, and 10 ml/liter in drinking water, respectively. Results indicated improved growth performance in broiler had supplementation of Chinese herbal extracts in drinking water as compared to control (P<0.05). A significant decrease in cholesterol and blood glucose was observed in those birds which had supplementation of Chinese herbs extracts in drinking water (P<0.05). Moreover, Chinese herbs extract in drinking water improved immune organ weight and immune indexes in broiler. It could be concluded that supplementation Chinese herbs extracts in drinking water had positive influence on growth performance, blood biochemistry and immune organs in broiler.

Keywords

Lonicera japonica; Radix liquiritiae; Lysimachia davurica; Growth performance; Broiler

Introduction

Phytogenics, pharmaceutical plants, and herbs are being used in human food for different purpose [1]. In recent years, the use of phytogenics, pharmaceutical plants, and herbs has been increased in the diet of poultry as fed additive to boost health and comfort of birds [2-4]. The use of herbs or herbs extract as alternative growth promotor has been increased due to ban of antibiotics as growth promotor in poultry diet [3,5]. In commercial diet of poultry different types of antibiotics are used to reduce load of harmful microorganisms in intestine of the bird and to improve growth performance, feed conversion ratio, and immunity [4,6]. However, different countries have banned antibiotics use in animal diets due to efflorescence of microbe resistance [7,8]. Therefore, scope of use of herb or herb extract is increasing as growth promotor.

In livestock nutrition generally and poultry nutrition specifically, a large number of herbs has been used to evaluate herbs potential as growth promotor, coccidiostatic, antimicrobial, anthelmintic, and immune-stimulating [4]. Among different herbs, Chinese herbs are the most popular options as a substitute of antibiotic growth promoters because Chinese herbs have been proved to have a great effect toward immune response, intestinal health, nutrient metabolism and growth in animals [2]. However, studies of Chinese herbs like Rheum rhabarbarum (Lonicera japonica), Radix liquiritiae, and Codonopsis in animal feed generally and poultry feed specifically are limited.

Lonicera japonica is an important herbal medicinal plant and known due to its antimicrobial, hepatoprotective, immunostimulant, antigenotoxic, antioxidant, antifungal, antihypertensive and anti-inflammatory action [3]. It has been reported that Lonicera japonica contains different phytochemicals isoazadirolide, nimbandiol, nimbaflavone, nimbinene, querectin, nimbolide, quercitrin, vilasanin and rutin [9]. Radix liquiritiae, is another herbal medicinal plant having antifungal, antibacterial, antiviral, anti-amoeba, anti-inflammatory, antidiarrhea, and antioxidant effects [10]. Radix liquiritiae is abundant in phytochemicals like mucilage and resins. Another Chinese herb Codonopsis could be used as growth promoter in broiler diet. Codonopsis is as non-conventional vegetable protein in poultry rations. It is also known as for its antibiotics, hypocholesterolaemic, antiulcerative, anti-inflammatory and diuretic agent [11].

Based on therapeutic potentials of Lonicera japonica, Radix liquiritiae, and Codonopsis, we hypothesized that Lonicera japonica, Radix liquiritiae, and Codonopsis could be good herbal growth promoters. Therefore, a study was executed to examine Lonicera japonica, Radix liquiritiae, and Codonopsis extract effects on growth performance, blood chemistry, carcass characteristics and digestibility of nutrient in broilers chicks.

Materials and Methods

Current experimental trial was executed on research centre of College of Agriculture, Department of Veterinary Science, Ningxia University, China. All procedures and experiments protocol were approved by the Ethic Committee of Animal Experiments, Department of Veterinary Science, College of Agriculture, Ningxia University. All birds under the current trail were handled humanly and no stress was given throughout the experiment. During the experiment animal were given free access to water and commercial to avoid thrust and hunger stress. Birds welfare protocol was followed strictly. In current experiment a total of 150 day old broiler chicks were procured from the local hatchery. Procured day old chicks were housed in floor pens and raised on commercial feed for 7 days to adopt house conditions. After seven days, all chicks were divided into five groups in such a way that each group contained 3 replicates and each replicate had 10 birds (approx. 1.2 bird/ft2). The trail was executed in environmental control conditions and light schedule was 21-h light period with 3-h dark cycle. Each replicate was placed in a specific floor pen of dimension 4×3 ft2 (Details of birds per replicate are given above). Saw dust was used as a litter material and the depth of litter material was 5-6 cm. Two types of commercial feed, granules and pellet, were used in the current experiment. Granules form of feed was used from day 1 to 21 day of life, while pellet form of feed was used from 22 to 35 days. Six treatments were applied in current experiment in such a way that each treatment had commercial feed adlibitum and drinking water with or without supplement. In control treatment drinking water was without any additives; in second treatment drinking water was supplemented with antibiotic (Flavomycin 10 ml/liter). The remaining three treatments were supplemented with Lonicera japonica, Radix liquiritiae and Lysimachia davurica extract @ 20 ml/liter, 15 ml/liter, and 10 ml/liter in drinking water, respectively. The brooding temperature was 95°F for first week and then reduces every week 5°F. Local vaccination schedule was followed. The house relative humidity was maintained between 50 to 70% throughout the trail.

Extraction of herbs

Lonicera japonica, Radix liquiritiae and Lysimachia davurica leaves were purchased from College of Agriculture, Department of Botany, Ningxia University, China. Procured leaves were dried at room temperature. Dried leaves were sliced and grinded in hammer mill of sieve size 0.5 mm to obtain fine powder. Fine powder of each Chinese herb i.e., Lonicera japonica (4 g), Lysimachia davurica (6 g) and Radix liquiritiae (2 g) was added in 100 ml of purified water. The pH of obtained solutions was maintained at 7 and heated at 80°C for 3 h. The prepared solutions were filtered with ordinary filter paper and cool down for two days at room temperature as described by Farhat [12].

Performance and carcass parameters

Weights of broilers chicks were measured on weekly basis. For this purpose, broiler chicks’ final body weight was subtracted from initial body weight every week. Feed consumption data was calculated on daily basis throughout the trail period. For carcass parameters, at day 35 of trial, four birds per replicate were randomly selected, weighed and slaughtered by using a conventional neck cut method to cut the carotid artery and jugular vein, and bled for two minutes. Carcasses were divided to measure the weights of heart, liver and gizzard as well as dressed weight, live weight, thigh weight, breast weight and the abdominal fat weight.

Nutrient digestibility

At the day 28-29 of the experiment, feces and feed were collected and weighted by 12 brids from each experimental group (2 birds/replicate). For this purpose, each bird was kept separately in individual metabolic pens with feces collecting trays under each pen. Feces were collected for forty-eight hours to measure nutrient digestibility according to Leeson [7]. Then, the collected samples were placed in forced air oven at 60°C for 24 h to dry samples. After drying of samples, all samples were thoroughly homogenized. Representative samples were taken and ground by small hammer mill for further lab analysis. Proximate analysis of ground samples was done according to recommended procedure of AOAC with some modification as followed by Rahman et al. [13].

Blood biochemistry and Immune performance

At last day of the experiment, blood samples (5 ml) were also collected from slaughtered birds. The serum (used for further analysis) was obtained from four blood samples from each replicate in sanitized serum tubes and stored (-20°C) until used for the measurement of blood cholesterol and glucose by using standard kit (Biomega) procedure via biochemistry analyzer (Techno-786). Similarly, blood samples from each replicate were also placed in EDTA tubes for hemoglobin concentration (Hb) and Packed Cell Volume (PCV) analysis. Hb and PCV were determined using Blood Chemistry Analyzer (Sysmax KX-21). Compound microscope was used to obtain differential leukocyte count of blood samples.

For measurement of immune response, 6 birds were randomly selected from each treatment group at day 7, 14, 21 and 28 of trail. Birds are weighed in morning and dissected to collect the thymus, spleen and bursa of fabricius for organ weight. Following formula was used to check immune organ index:

Immune organ index (mg/g)=immune organ weight/live weight

Statistical analysis

All collected data were analyzed by using standard Analysis of Variance Technique (ANOVA) and Completely Randomized Design (CRD) was employed. Least significance difference was used to compare treatment means differences.

Results

The effect of Lonicera japonica, Radix liquiritiae and Lysimachia davurica extract supplementation in drinking water on performance and carcass parameters of growing broiler were summarized in Table 1. Increased in body weight and breast meat yield had been observed in broilers received drinking water with supplementation of Chinese herbs. Similarly, feed efficiency ratio was improved in broiler received drinking water with supplementation of Chinese herbs (P<0.05). Results revealed that Lonicera japonica extract supplementation in drinking water enhanced the dressing percentage and breast meat yield as compared to control, Flavomycin, Radix liquiritiae, and Lysimachia davurica (P<0.05). However, liver weight, thigh weight, heart weight and abdominal weight was not influenced by dietary treatment (P>0.05). Moreover, no differences were observed on feed intake, dressing percentage and breast weight between control group and chickens received drinking water with supplementation of antibiotics (P>0.05).

  Treatments1
Control Antibiotic Chinese herbs extract
No additive Flavomycin Lonicera japonica Radix liquiritiae Codonopsis
First body weight (g)` 189 ± 2.240 188 ± 1.982 185 ± 2.650 186 ± 1.982 187 ± 1.541
Last body weight (g) 1837 ± 1.433b 1930 ± 1.234ab 2034 ± 1.302a 1972 ± 1.541a 1951 ± 1.342ab
Weight gain (g) 1645 ± 1.302b 1750 ± 1.302a 1869 ± 1.241a 1795 ± 1.302a 1775 ± 1.432a
Feed conversion ratio 1.85 ± 0.302b 1.79 ± 0.241a 1.74 ± 0.302a 1.78 ± 0.214a 1.75 ± 0.402a
Feed intake (g) 3394 ± 2.542b 3440 ± 1.345b 3578 ± 1.922a 3475 ± 2.023ab 3415 ± 1.294b
Dressing (%) 64.79 ± 1.422b 65.25 ± 1.121b 68.76 ± 1.302a 64.94 ± 2.982b 67.15 ± 1.872ab
Liver (g/100 g body weight) 2.39 ± 0.982 2.51 ± 0.914 2.97 ± 0.321 2.83 ± 0.092 2.42 ± 0.076
Thigh (g/100 g body weight) 20.20 ± 0.872 21.10 ± 0.822 22.17 ± 0.098 19.34 ± 0.672 20.37 ± 0.0762
Breast (g/100 g body weight) 21.74 ± 0.376b 21.90 ± 0.641b 25.42 ± 0.205a 21.88 ± 0.639b 22.48 ± 0.302b
Heart (g/100 g body weight) 0.45 ± 0.153 0.55 ± 0.125 0.56 ± 0.109 0.57 ± 0.012 0.58 ± 0.092
Abdominal fat (g/100 g body weight) 3.17 ± 0.612 3.13 ± 0.642 3.14 ± 0.088 3.09 ± 0.201 2.92 ± 0.164
Gizzard (g/100 g body weight) 1.40 ± 0.232b 1.58 ± 0.302a 1.64 ± 0.098a 1.66 ± 0.225a 1.46 ± 0.032b

Table 1: Effect of Lonicera japonica, Radix liquiritiae and Lysimachia davuricaleaf extracts supplementation on growth performance and carcass characteristics of broilers. Means with different superscripts shows significant difference (P<0.05). 1Treatments: control (no supplementation), antibiotics (Flavomycin 10 ml/liter), Chinese herb extract, Lonicera japonica, Radix liquiritiae, and Codonopsis extract @ 20 ml/liter, 15 ml/liter, and 10 ml/liter in drinking water.

Table 2 represent the nutrient digestibility of broiler on Chinese herbs supplementation in drinking water. Supplementation of flavomycin, Lonicera japonica, Radix liquiritiae, and Lysimachia davurica in drinking water increased CP and EE digestibility compared with control (P<0.05). However, no significant differences were found in broilers received flavomycin and Chinese herbs extract supplementation in drinking water. Crude fiber digestibility was not affected by supplementation of flavomycin and Chinese herbs in drinking water.

  Treatments1
Control Antibiotic Chinese herbs extract
No additive Flavomycin Lonicera japonica Radix liquiritiae Codonopsis
Ether extract 84.25 ± 1.201b 86.58 ± 0.912a 87.44 ± 1.353a 86.89 ± 0.781a 87.00 ± 0.281a
Crude fiber 12.81 ± 1.302 16.10 ± 0.907 17.92 ± 0.955 14.85 ± 0.982 15.25 ± 0.811
Crude protein 71.99 ± 0.403b 73.11 ± 1.560a 74.96 ± 0.921a 72.89 ± 0.541ab 73.25 ± 0.671a

Table 2: Effect of Lonicera japonica, Radix liquiritiaeand Lysimachia davuricaleaf extracts supplementation on digestibility of nutrients. Means with different superscripts shows significant difference (P<0.05). 1Treatments: control (no supplementation), antibiotics (Flavomycin 10 ml/liter), Chinese herb extract, Lonicera japonica, Radix liquiritiae, and Codonopsis extract @ 20 ml/liter, 15 ml/liter, and 10 ml/liter in drinking water.

Blood chemistry statistical analysis revealed that addition of Chinese herbal extract into drinking water showed a significant effect on blood cholesterol, glucose and red blood cells (RBC) (P<0.05) (Table 3). Supplementation of flavomycin, Lonicera japonica, Radix liquiritiae, and Codonopsis in drinking water resulted in a significant decrease in cholesterol and increase in RBC compared with control (P<0.05). The study finding showed a significant (P<0.05) reduction of blood glucose in the broilers received drinking water with supplementation of Lonicera japonica. However, white blood cells WBC, hemoglobin, and PCV stayed same due to the supplementation of Chinese herbal extracts, and antibiotics as compere to control.

  Treatments1
Control Antibiotic Chinese herbs extract
No additive Flavomycin Lonicera japonica Radix liquiritiae Codonopsis
Packed cell volume % 26.86 ± 0.509 27.97 ± 8.380 29.71 ± 8.380 27.66 ± 1.380 30.00 ± 8.380
Cholesterol (mg/dl) 134.00 ± 0.143a 128.58 ± 0.096b 124.67 ± 0.921b 123.00 ± 0.806b 124.00 ± 1.830b
Hemoglobin (g/dl) 9.56 ± 0.306 9.80 ± 0.750 10.21 ± 0.153 9.69 ± 1.030 10.38 ± 0.409
White blood cell % 204.51 ± 0.621 210.23 ± 0.306 235.00 ± 1.830 206.00 ± 1.409 222.00 ± 0.123
Red blood cell % 2.10 ± 0.104b 2.17 ± 1.830a 2.28 ± 1.109a 2.13 ± 1.091a 2.21 ± 1.019a
Blood sugar (mg/dl) 208.85 ± 1.130a 204.57 ± 0.104ab 191.23 ± 0.243c 203.83 ± 1.02ab 194.66 ± 0.113bc

Table 3: Effect of Lonicera japonica, Radix liquiritiae and Lysimachia davurica leaf extracts supplementation on broilers blood chemistry. Means with different superscripts shows significant difference (P<0.05). 1Treatments: control (no supplementation), antibiotics (Flavomycin 10 ml/liter), Chinese herb extract, Lonicera japonica, Radix liquiritiae, and Codonopsis extract @ 20 ml/liter, 15 ml/liter, and 10 ml/liter in drinking water.

Results of immune organ weight and immune index are presented in Tables 4 and 5, respectively. Supplementation of Chinese herbs in drinking water enhanced the weight of thymus and spleen at week 1, 2, 3 and 4 (P<0.05). Highest bursa weight at week 4 was observed in birds supplemented Lonicera japonica in drinking water (P<0.05). Results of immune organ index revealed that Lonicera japonica and Codonopsis significantly influence thymus, spleen and bursa immune index at week 1 (P<0.05). At week 2 highest immune organ index for bursa and thymus was observed for Codonopsis, while for spleen was observed in Radix liquiritiae. Highest immune organ index for spleen, thymus and bursa was observed in Radix liquiritiae, Lonicera japonica and Codonopsis at week 3, respectively (P<0.05). Interestingly, at week 4 highest immune organ index for thymus, and spleen was observed in control group, however, highest immune organ index for bursa was observed in Lonicera japonica treatment.

    Treatments1
Control Antibiotic Chinese herbs extract
  Organs No additive Flavomycin Lonicera japonica Radix liquiritiae Codonopsis
Week 1 Thymus 0.213 ± 0.098c 0.277 ± 0.156a 0.266 ± 0.093a 0.257 ± 0.106ab 0.259 ± 0.146a
Spleen 0.107 ± 0.038c 0.137 ± 0.089b 0.178 ± 0.085a 0.135 ± 0.099bc 0.140 ± 0.079ab
Bursa 0.150 ± 0.075bc 0.167 ± 0.056b 0.195 ± 0.096a 0.157 ± 0.086b 0.173 ± 0.046abc
Week 2 Thymus 0.602 ± 0.213ab 0.611 ± 0.227b 0.781 ± 0.197a 0.605 ± 0.207a 0.641 ± 0.267a
Spleen 0.246 ± 0.101c 0.241 ± 0.068b 0.209 ± 0.041ab 0.242 ± 0.098a 0.239 ± 0.078ab
Bursa 0.432 ± 0.088c 0.470 ± 0.191b 0.530 ± 0.133a 0.460 ± 0.111b 0.480 ± 0.811a
Week 3 Thymus 1.047 ± 0.375abc 1.120 ± 0.262a 1.013 ± 0.283ab 1.110 ± 0.212a 1.110 ± 0.162a
Spleen 0.436 ± 0.121c 0.395 ± 0.143b 0.621 ± 0.233a 0.385 ± 0.153b 0.435 ± 0.243b
Bursa 0.647 ± 0.291bc 0.798 ± 0.309a  0.625 ± 0.321a 0.795 ± 0.319b 0.791 ± 0.409ab
Week 4 Thymus 1.945 ± 0.831c 2.156 ± 0.695a 2.279 ± 0.319a 2.146 ± 0.615a 2.157 ± 0.795ab
Spleen 0.655 ± 0.191c 0.862 ± 0.292a 0.718 ± 0.161ab 0.852 ± 0.272b 0.868 ± 0.292a
Bursa 0.316 ± 0.123bc 0.386 ± 0.182b  0.457 ± 0.111a 0.366 ± 0.102bc 0.389 ± 0.382bc

Table 4: Effect of Lonicera japonica, Radix liquiritiae and Lysimachia davurica leaf extracts supplementation on weight (g) of immune organs in broilers. Means with different superscripts shows significant difference (P<0.05). 1Treatments: control (no supplementation), antibiotics (Flavomycin 10 ml/liter), Chinese herb extract, Lonicera japonica, Radix liquiritiae, and Codonopsis extract @ 20 ml/liter, 15 ml/liter, and 10 ml/liter in drinking water.

Treatments1
  Control Antibiotics Chinese herbs extract
  Organ No additive Flavomycin Lonicera japonica Radix liquiritiae Codonopsis
Week 1 Thymus 0.264 ± 0.089c 0.331 ± 0.211a 0.317 ± 0.106a 0.311 ± 0.201b 0.312 ± 0.221a
Spleen 0.146 ± 0.077bc 0.161 ± 0.109b 0.213 ± 0.104a 0.151 ± 0.119bc 0.160 ± 0.105a
Bursa 0.209 ± 0.135ab 0.195 ± 0.062b 0.227 ± 0.092a 0.185 ± 0.073c 0.192 ± 0.053ab
Week 2 Thymus 0.414 ± 0.153ab 0.391 ± 0.103bc 0.435 ± 0.095ab 0.394 ± 0.123ab 0.389 ± 0.112a
Spleen 0.167 ± 0.061a 0.157 ± 0.046ab 0.116 ± 0.025bc 0.147 ± 0.035a 0.154 ± 0.054ab
Bursa 0.281 ± 0.059ab 0.287 ± 0.095b 0.288 ± 0.056ab 0.282 ± 0.084ab 0.284 ± 0.085a
Week 3 Thymus 0.344 ± 0.132c 0.405 ± 0.065a 0.395 ± 0.082b 0.415 ± 0.075a 0.397 ± 0.076a
Spleen 0.146 ± 0.060bc 0.157 ± 0.053b 0.219 ± 0.074a 0.147 ± 0.042b 0.151 ± 0.064b
Bursa 0.215 ± 0.097b 0.293 ± 0.125a 0.218 ± 0.074a 0.293 ± 0.125b 0.289 ± 0.134a
Week 4 Thymus 0.452 ± 0.162a 0.482 ± 0.105a 0.513 ± 0.084a 0.472 ± 0.124a 0.480 ± 0.124a
Spleen 0.172 ± 0.063a 0.211 ± 0.068b 0.159 ± 0.045b 0.201 ± 0.015ab 0.204 ± 0.057bc
Bursa 0.078 ± 0.031c 0.091 ± 0.042b 0.099 ± 0.026a 0.081 ± 0.032a 0.090 ± 0.051ab

Table 5: Effect of Lonicera japonica, Radix liquiritiae and Lysimachia davurica leaf extracts supplementation on immune organ index (mg/g) in broilers. Means with different superscripts shows significant difference (P<0.05). 1Treatments: control (no supplementation), antibiotics (Flavomycin 10 ml/liter), Chinese herb extract, Lonicera japonica, Radix liquiritiae, and Codonopsis extract @ 20 ml/liter, 15 ml/liter, and 10 ml/liter in drinking water.

Discussion

Results of the current study showed that supplementation of Chinese herbs increased body weight gain, improved feed efficiency and breast muscle weight. Increased body weight gain, improved feed efficiency and breast muscle weight might be attributed to the growth promoting effect of some ingredients of Chinese herbs. Saleh et al. [1] reported that ingredients within herbal extract enhanced the body weight gain, improved efficiency of feed and breast muscle yeild. Current findings of growth are also in consistent with the study of Seyed et al. [6], AL-Kassie [14], Omar et al. [5] and Sajid et al. [15] who reported enhanced growth performance of birds provided drinking water with Lonicera japonica, Radix liquiritiae and Codonopsis leaf extracts. However, contrary results of herbal extract supplementation are also observed in the study of Wanker et al. [16] who observed no effect on growth performance of broilers when herbal powder was supplemented in the diet of broiler. The contradiction in literature could be explained by supplementation method i.e., trough drinking water or feed. Improved growth performance and better carcass results could be explained by better digestibility of CF and EE in current study. Improved digestibility of CP and EE, while no influence on CF digestibility has been observed in the current study. Current findings are in line with findings of Saleh et al. [1] who observed improved CP and EE digestibility and no effect on CF digestibility in broiler fed herbal extracts.

Blood chemistry results revealed decrease in blood sugar due to supplementation of Chinese herbs extract. Findings are in consistent with the study of Ayorinde et al. [17] and Sajid et al. [15], who examined decrease of blood sugar level in broilers fed herbal extract. The decrease in blood glucose could be explained by suppressive influence of herbals extracts on glucagon [2]. Cholesterol level in current study are in line with findings of Seyed et al. [6] who reported that herbal plant leaves extract as a substitute of antibiotic reduce the cholesterol level of birds. No change of blood hemoglobin was observed in experimental treatments in current study. The current results are also consistent with Salarya et al. [18] who reported that addition of herbal plant leaves extract in broilers drinking had no effect on hemoglobin. Mwale et al. [19] also reported that that addition of herbal plant leaves extract in broilers drinking had no effect on hemoglobin. In the current study, PCV was also not changed by treatments. It has been reported that addition of herbs leaf extract has no influence on PCV [20]. Findings of WBC in current are in line with results of Alireza et al. [21]. Alireza et al. [21] observed that addition of herbs leaf extracts in the diet of broiler had no influence on WBC.

The results of immune organ weight and immune index are well matched with Sajid et al. [15] findings. Sajid et al. [15] reported that the supplementation of herbs in chicken increased the immunity of chicken. Zhang et al. [22] found that addition of Astragalus herb powder in feed showed significant difference in immune organs weight of broilers. Thymus, spleen and bursa of fabricius are the most important immune organs which have vital role for immunity in poultry [23]. Supplementation of Chinese herbs in drinking water enhanced the weight of thymus, spleen and bursa weight which represent better immunity in birds and can be well defended by better growth performance [22-38]. Results of immune organ index revealed that Lonicera japonica, Codonopsis and Radix liquiritiae significantly influence thymus, spleen and bursa immune index at different weeks representing better immune status of birds supplemented with herbs extract.

Conclusion

Lonicera japonica, Radix liquiritiae and Codonopsis leaf extracts supplementation in drinking water improve growth performance, feed conversion ratio, dressing percentage, gizzard weight, breast meat yield, crude protein and ether extract digestibility. Lonicera japonica, Radix liquiritiae and Codonopsis leaf extracts supplementation in drinking water also improve blood chemistry parameters, immune organ weight and immune indexes. Therefore, Lonicera japonica, Radix liquiritiae and Codonopsis leaf extracts has potential to be alternative of antibiotic (flavomycin) growth promotor.

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Author Info

Atif Rehman, Xu Jingyi, Liu Shuang, Liu Fan, Chen Xiu Hong, He Shenghu* and Zhao Hong Ji
 
Department of Veterinary Science, College of Agriculture, Ningxia University, Ningxia Hui Autonomous Region Yinchuan, China
 

Citation: Rehman A, Jingyi X, Shuang L, Fan L, Hong CX, Shenghu H, et al. (2019) Comparative efficacy of different Chinese herbal extracts in broiler production. Poult Fish Wildl Sci 7:205. doi: 10.35248/2375-446X.19.7.205

Received: 18-May-2019 Accepted: 07-Jun-2019 Published: 14-Jun-2019 , DOI: 10.35248/2375-446X.19.7.205

Copyright: © 2019 Rehman A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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