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Effects of GroPro Poultry on growth performance, intestinal development, immunity and slaughter performance in broilers

October 29th, 2019

By Xiangqian Xiao

Nucleic acid is an important compound in the body. It has important physiological and biochemical functions. GroPro Poultry is also a source of nucleic acid in addition to animal organs and fish meal. In this experiment, the effects of GroPro Poultry on broiler performance, intestinal development and slaughter performance were performed.

Nucleic acid is an important compound in the body. It has important physiological and biochemical functions. It can participate in the synthesis of genetic material and has a significant impact on intestinal development and immune system. Studies have shown that nucleic acid can promote the growth of livestock and poultry and improve their immune function. At the same time, it can affect the quality of poultry intestinal mucosa and the activity of intestinal mucosal protease. GroPro Poultry is also a source of nucleic acid in addition to animal organs and fish meal.

In this experiment, the effects of GroPro Poultry on broiler performance, intestinal development and slaughter performance were performed, and the economic benefit was analyzed to provide support for the application of GroPro Poultry. One-day-old white-feathered broilers were randomly divided into two treatment groups (4 replicates in the control group and 3 replicates in GroPro Poultry group, 12,000 broilers per replicate). The control group was fed with basic diet and GroPro Poultry group was fed with 800 mg/kg GroPro Poultry for 42 days.

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1 Effects of GroPro Poultry on broiler performance

From Table 1, it can be seen that the mortality and feed-meat ratio of GroPro Poultry group were lower than those of control group, and the mortality of two groups showed significant difference after 21 days of age (P < 0.05); ADG and body mass of the group were higher than those of the control group, and the daily intake of food was close to that of the control group. Therefore, the addition of GroPro Poultry in the diet can improve feed conversion rate, feed quality and survival rate in later period.

Table 1. Effects of GroPro Poultry on broiler performance

Groups

1-21 days age

22-42 days age

1-42 days age

Mortality rate, %




Control

3.24±0.70

10.71±1.98a

13.95±2.66a

GroPro Poultry

3.26±0.58

4.11±1.87b

7.37±2.26b

ADFI, g




Control

49.21±5. 71

159.91±6.29

104.40±4.46

GroPro Poultry

49.15±5. 61

159.03±9.00

104.08±7.16

ADG, g




Control

33.24±3.15

72.56±8. 83

52.90±4.56

GroPro Poultry

33.61±3.99

75.09±2.96

54.35±2.29

FC




Control

1.48±0.21

2.44±0.24

1.97±0.07

GroPro Poultry

1.46±0.04

2.30±0.10

1.88±0.05

AW, g


21 days age

42 days age

Control


739.63±64.96

2264.00±191.00

GroPro Poultry


748.88±83.47

2326.00±96.00

Note 1: There was no significant difference between the same letter or no letter in the same column data (P > 0.05), but there was significant difference between the different lower-case letters in the shoulder label (P < 0.05).

Note 2: The experiment was carried out during the snowy winter season in Northern China. The temperature of the chicken house fluctuated greatly in the brooding stage, resulting in a slight deviation in the production performance.

2 Effects of GroPro Poultry on intestinal development in broilers

From Table 2, it can be seen that the jejunal index and relative length of GroPro Poultry group were significantly increased compared with those of the control group (P < 0.05).

Table 2. Effect of GroPro Poultry on intestinal index and relative length in broilers

Groups

21 days age

Duodenum

Jejunum

Ileum

Relative length of intestine (cm·kg-1)




Control

34.96±4.54

74.11±8.76a

72.61±6.93

GroPro Poultry

35.12 ±3.37

82.22±9.80b

72.52±8.35

Intestinal index (g·kg-1)




Control

10.44±2.43

15.14±3.00a

11.06±2.98

GroPro Poultry

11.18±2.09

18.60±3.68b

10.89±2.22

Notes are the same as Table 1.

From Table 3, it can be seen that V and V/C of each intestinal segment in GroPro Poultry group were significantly higher than those in the control group (P < 0.05), C of duodenum and ileum was significantly lower than that in the control group (P < 0.05), and C of jejunum was similar to that in the control group. Small intestinal villus is an important part of nutrient uptake. V, C and V/C are important indicators of small intestinal digestion and absorption. Intestinal cells migrate upward from crypts and gradually differentiate into mature intestinal cells. When they reach the top of villi, they differentiate into fully mature intestinal cells, which have complete secretion and absorption functions. Intestinal villi injury, atrophy or breakage all affect the content and activity of enzymes in brush-like margin, and then affect the digestive and absorption performance of intestinal tract. The development of small intestinal tissue structure and function can not be judged solely on the basis of V or C. V/C is the most direct index reflecting the structure and function of small intestinal tissue. The larger V/C, the larger V/C, the lower C, the better the structure and function of intestinal tissue.

Table 3. Effects of GroPro Poultry on intestinal morphology in broilers

Groups

21 days age

Duodenum

Jejunum

Ileum

Villus height, μm




Control

917.68±183.12a  

478.04±111.39a

357.86±69.91 a

GroPro Poultry

1041.44±158.46b  

606.78±84.85b

403.15±60.02 b

Crypt depth, μm




Control

232.97±37.82a  

175.60±42.59

137.25±29.54 a

GroPro Poultry

194.16±36.37b  

184.35±31.70

114.91±26.47 b

V/C




Control

4.03±0.96 a  

2.83±0.75 a

2.72±0.77 a

GroPro Poultry

5.58±1.50b  

3.41±0.84 b

3.64±0.77 b

Notes are the same as Table 1.

GroPro can release a lot of nucleic acid in yeast cells by enzymatic hydrolysis and autolysis during the production process. The nutritional value of yeast nucleic acid is embodied as exogenous nucleic acid, which provides raw materials for the "remedial pathway" of nucleotide synthesis and meets the needs of nucleotides under special conditions of animals. Supplementation of exogenous nucleic acid has important nutritional and physiological effects on animal intestinal development: it can increase the content of protein and nucleic acid in small intestine, help intestinal tissue to synthesize protein, increase the height of intestinal villus and the thickness of intestinal wall, enhance the activity of intestinal protease and amylase, improve intestinal absorption function, and accelerate the recovery of intestinal injury. Therefore, the addition of GroPro to the diet promotes the development of small intestine, improves the intestinal morphology and structure, and enhances the digestive and absorption function of small intestine.

3 Effects of GroPro Poultry on the development of immune organs in broilers

Table 4 shows that there is no significant difference in spleen and bursa of Fabricius between GroPro Poultry group and control group (P>0.05), but there is a tendency to increase bursa index. GroPro Poultry contains yeast cell wall polysaccharide, which can stimulate immunity and promote the development of immune organs. Bursa of Fabricius is the birthplace of B lymphocyte and plays an important role in the maturation of B lymphocyte. Therefore, GroPro Poultry can promote the development of bursa of Fabricius and facilitate the development and maturation of B lymphocyte.

Table 4. Effect of GroPro Poultry on immune organ index in broilers

Groups

Spleen

Bursa of Fabricius

Control

1.18±0. 28

0.90±0.40

GroPro Poultry

1.19±0. 37

0.97±0.59

4 Effects of GroPro Poultry on slaughter performance in broilers

Table 5 shows that the slaughter rate of GroPro Poultry group is higher than that of the control group, but the difference is not significant (P>0.05), which indicates that adding GroPro Poultry to broiler diet can improve the slaughter performance of animals.

Table 5. Effects of GroPro Poultry on slaughter performance in broilers

Groups

Slaughter rate

Control

87.72 ±0.81

GroPro Poultry

88.27 ±0.65

5 Economic benefit analysis

Table 6. Economic benefit analysis

Groups

Difference value(GroPro Poultry group minus control group)

Medicine cost per broiler, USD

-0.02

Earnings per broiler, USD

0.29

Cost per broiler, USD

0.01

Input-output ratio

1 : 29

Adding GroPro Poultry to the diet can promote the development of small intestine, improve the intestinal morphology and structure, enhance the digestive and absorption function of small intestine, and then improve the feed conversion rate, reduce the feed-meat ratio by 0.09, and improve the quality of entry by 60g. Adding GroPro Poultry to the diet can promote the development of bursa of Fabricius and facilitate the development and maturation of B lymphocyte. Adding GroPro Poultry to the diet could increase the slaughter rate by 0.55%. Adding 800 mg/kg GroPro Poultry to the diet, for each chicken, an average investment of 0.01 USD during the whole breeding process can reduce the cost of medicine by 0.02 USD, and increase the profit by 0.29 USD when it finally comes out.

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