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.
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
1-21 days age
22-42 days age
1-42 days age
Mortality rate, %
21 days age
42 days age
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
21 days age
Relative length of intestine (cm·kg-1)
Intestinal index (g·kg-1)
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
21 days age
Villus height, μm
Crypt depth, μm
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
Bursa of Fabricius
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
5 Economic benefit analysis
Table 6. Economic benefit analysis
Difference value(GroPro Poultry group minus control group)
Medicine cost per broiler, USD
Earnings per broiler, USD
Cost per broiler, USD
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.
About Angel Animal Nutrition:
Fubon is a brand of Angel Animal Nutrition. Fubon is committed to developing natural, efficient microbial feed derived from yeast with Angel's leading technology in yeast industry, providing the best service solutions for the nutrition and health in animals. Angel Animal Nutrition creates value for global feed and animal agriculture customers through continuously upgraded products and professional services.
Angel Yeast Company is a high-tech listed company specializing in yeast and biotech. Product business covers Yeast and Baking, Yeast Extract-Savoury, Nutrition & Health and Biotechnology fields. It is one of the world's leading companies in the yeast industry. Angel has 12 holding subsidiaries and provides products and services for more than 150 countries and regions.
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