Houttuynia cordata extract, as a natural product, has the characteristics of safety, nutrition and little toxic and side effects, and began to be used as a new additive in feed.
1. Antibacterial effect. The antibacterial test showed that houttuynia cordata extract had a wide range of antibacterial effects, and had obvious inhibitory effects on Catarrh, Staphylococcus aureus and pneumococcus influenzae. It has certain inhibitory effect on proteus escherichia coli, Dysentery bacillus, mycobacterium, diphtheria bacillus, penicillium Niger and yeast. It also has strong inhibitory effect on salmonella typhi and leptospirosis.
The results showed that houttuynia cordata extract had strong antibacterial effect on Escherichia coli and Salmonella, and the lowest inhibitory concentration was 0.65.1.45g/L, respectively.
2. Antioxidants. It has scavenging effect on DPPH. Radical activity,.OH radical and superoxide 02. It is a good natural antioxidant. It was found that the antioxidant effect of Houttuynia cordata was directly related to the total phenols and flavonoids contained in houttuynia cordata.
3. Enhance the body's immune function. It can enhance the phagocytosis ability of leucocyte and increase the level of serum lysin, so as to enhance the non-specific immunity ability of the body.
4. Houttuynia houttuynia extract also has anti-allergy, anti-inflammatory, diuretic and other functions.
Application of houttuynia cordata extract
Adding a certain proportion of Houttuynia cordata into the diet could increase the daily gain, feed intake and feed digestibility of livestock and poultry, reduce the ratio of feed to meat, and reduce the diarrhea rate.
1. The experiment showed that adding proper amount of Houttuynia cordata extract into the diet of weaned piglets at 35 days of age can promote the growth of piglets, increase daily gain, feed intake, decrease feed to meat ratio and diarrhea rate.
2. For finishing pigs, the daily gain was increased by 5.4%-10% and the feed/meat ratio was decreased by 3%-13%, and the best effect was 0.2%.
3. A large number of studies have shown that adding a certain amount of houttuynia cordata extract into the diet can effectively enhance the immunity of livestock and poultry, reduce the incidence of disease and improve the survival rate. The diarrhea rate was reduced by 60-70% and the survival rate was increased by 7-10%, which was more effective than antibiotics.
4. The addition of houttuynia cordata extract at 0.3%-0.5% in diets not only has no negative effects on growth and metabolism of broilers, but also can improve lipid metabolism and immunity.
