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Mechanism of application of Chinese herbal medicine feed additives in animal production
2. 1 Prevention and treatment of diseases

Traditional Chinese medicine feed additives can prevent and treat diseases of livestock and poultry by strengthening spleen, stimulating appetite, invigorating qi and promoting blood circulation, enhancing immune function and promoting metabolism. If the disease has occurred, it is necessary to clear away heat and toxic materials, clear away heat and dry dampness, improve immunity and achieve the purpose of curing the disease. Research and verification show that it has a good effect on bacterial infectious diseases, viral infectious diseases, parasitic diseases and other diseases. At present, the commonly used drugs mainly include Scutellaria baicalensis Georgi, Radix et Rhizoma Rhei, Coptidis Rhizoma, Flos Huanghua, Cortex Phellodendri, Flos Lonicerae, Fructus Forsythiae, Rhizoma Fagopyri Fagopyri, Radix Isatidis, Folium Isatidis, Herba Taraxaci, Herba Pogostemonis, Radix Bupleuri, Pulsatilla, Herba Andrographis, Radix Sophorae Flavescentis, Rhizoma Atractylodis, Radix Sophorae Tonkinensis, Bulbus Fritillariae Cirrhosae, Rhizoma Anemarrhenae, Radix Glycyrrhizae, Gypsum For example, in Beijing Veterinary Medicine Factory, eight kinds of traditional Chinese medicines, Pulsatilla chinensis, Herba Portulacae, Huangban, Realgar, terminalia chebula, Weishi and Pogostemon Pogostemonis, were used to prevent pullorum in chicks, and the treatment dosage was 0.5g per chick, with a protection rate of 99% and a cure rate of 98%, while the incidence rate in the control group was as high as 42%.

2.2 Health promotion and growth promotion

If pine needles, paulownia leaves, Codonopsis pilosula leaves and Artemisia argyi leaves are blindly made into powder and mixed into feed, it can promote growth and increase yield. After analysis, they are rich in amino acids, vitamins and trace elements, so they are called nutritional additives. For example, pine needles contain 18 amino acids, vitamin A, vitamin B 1, vitamin B2, vitamin E, vitamin K, vitamin C and trace elements. The stems and leaves of Codonopsis pilosula also contain 18 amino acids, 12 inorganic elements and active substances, and there are also mugwort leaves which have the functions of nutrition, disease prevention and growth promotion. If the chicks were fed with 3% dry powder mixed with paulownia leaves, after 4 weeks, the daily gain of the experimental group increased by 5.1%~ 6.4% and the feed reward increased by 5.5% ~ 6.19% compared with the control group.

2.3 No side effects, no drug resistance.

Most traditional Chinese medicines are naturally growing plants without pollution. Many Chinese herbal medicines belong to human food and livestock feed. Because of the homology of medicine and food, long-term clinical application practice has proved that there are few toxic and side effects that endanger the safety of people and livestock. It is reported that 40 grams of fresh grass of Euphorbia helioscopia is 10 times of the usual dosage, and it is safe to treat livestock and poultry diseases by decocting water and 1 time. Traditional Chinese medicine feed additives are mostly compound, and their applications are all compound preparations. Modern medical research has proved that traditional Chinese medicine feed additive is an immune enhancer for livestock and poultry. Its main pharmacological effects are: dilating blood vessels, increasing blood flow, improving microcirculation, exciting nervous system, accelerating the body's metabolic process, stimulating the body's hematopoietic function, promoting cell regeneration, increasing the total number of hemoglobin and red blood cells, accelerating the body's access to nutrients, increasing the total number of white blood cells, and improving the body's immunoglobulin content and HI titer, thus enhancing its autoimmune function, disease resistance, feed utilization rate and production performance. The principle of its prevention and treatment of diseases is that its drug components interfere with and destroy the metabolic function of pathogenic microorganisms from various aspects such as ribonucleic acid, deoxyribonucleic acid and energy metabolism process, which has a strong role in inhibiting and killing pathogens, so it is not easy to produce drug resistance and residues.