With the “Study of Chinese Herbal Medicines for the Prevention and Treatment of Seawater Fish Diseases†undertaken by the Key Laboratory of Mariculture Disease Prevention and Control of the Shandong Mariculture Research Institute, the project was completed in the province of Shandong Province and gradually realized industrial production. China has the following aspects in preventing fish diseases: New means.
Wang Yongqiang, deputy director of the Shandong Mariculture Research Institute, told the author: “After the fish is sick, it is no longer necessary to use antibiotics but natural Chinese herbal medicines. The development and use of herbal preparations is expected to completely solve the problem of drug residues in fish products. Make the fish 'build a healthy body'."
Research: Combining Formulations with Efficacy
In recent years, marine fish farming along the coast of Shandong Province has developed rapidly. No matter whether it is sea cage culture or factory culture, it has formed a considerable scale, especially in the breeding of carp, due to its high price, good quality, and market. The vastness has become the leading species of marine fish breeding in Shandong Province. However, with the expansion of the scale of farming and the increase of species, and the deterioration of the seawater environment, the types and incidence of fish diseases have also shown a significant increase. Studies have found that diseases caused by bacterial pathogen infections are one of the diseases that cause large numbers of marine fish deaths.
Members of the project team first conducted detailed investigations and studies on marine fish aquaculture and disease occurrence, and carried out research and discussion on the common diseases, frequently-occurring diseases, and the causes and incidence rules of marine fish.
After investigation and research, the project team found that most of the causes of bacterial diseases in marine fish are related to Vibrio, and many fish diseases are related to the disorders of the digestive system. Ascites, bloating, and hemorrhagic diseases have different degrees in the early stages. Digestive system symptoms, which are the most used aspects of antibiotics. Based on the findings of the above investigations and the difficulties in the prevention and control of marine fish disease, the project team developed a research direction targeting Chinese herbal medicine preparations for digestive tract diseases.
Based on the overall concept of TCM and the dialectical treatment theory, the project team finally developed three kinds of Chinese herbal medicines, "Yinbaikang", "Yuchang'an" and "Yujiansan", to prevent bacterial diseases in marine salmon farming. . In the scope of the trial, Chinese herbal medicines have significant effects on dyspepsia, enteritis, ascites, and abdominal distention of marine sea bass, and are superior to terramycin and other antibiotics. Tests have shown that: The combination of Chinese herbal medicine and micro-ecological preparations can significantly improve the efficacy, reduce the use of drugs by 50%, and accelerate the recovery of digestive diseases, reduce the recurrence of the disease.
Return: double harvest of social and ecological benefits
In addition to the production trials, “Yufukang†and “Yuanchang†were also expanded by more than 30 breeding units and farmers. According to the situation of follow-up visits, fish diseases such as dyspepsia, enteritis, and ascites were observed. The efficiency of treatment is close to 100%, while the use of antibiotics is greatly reduced.
Wang Yongqiang gave an example of this data. At the Longkou base of Shandong Provincial Key Laboratory for Marine Disease Prevention and Control, Chinese herbal medicines completely replaced antibiotics, and in the course of three cycles of 120,000 turbot breeding, antibiotics were Use zero. The first batch of experimental cultured 12,000 turbot, the survival rate was 98.26%, the production area per square meter was 18.4 kilograms; in the repeated experiment, the second batch of cultured turbot was nearly 50,000, and the third batch was cultured. Nearly 60,000 turbot turtles have a survival rate of 95% to 98%, and a production area of ​​18 kg to 21 kg per square meter.
In the aquaculture production trials based on disease prevention techniques of Chinese herbal medicines, aquaculture techniques such as high-quality seed breeding, marine fish immunity, and micro-ecological disease prevention have been comprehensively applied. The application of these technologies has largely replaced the use of antibiotics to prevent and treat diseases. Traditional craftsmanship. Combining the Shandong Provincial Agricultural Science and Technology Achievements Transformation Fund Project “Fish Breeding Vibrio spp. Breeding and Healthy Breeding Techniquesâ€, the project team has expanded these technologies to expand experiments and promotion. The project has completed a healthy breeding demonstration of 22,000 square meters. In meters, the technology was promoted to 60,000 square meters, and the survival rate of breeding was more than 95%, and the use of antibiotics was reduced by more than 90%.
Wang Yongqiang concluded that: By means of immunization, the self-defense capacity of marine fishes has been effectively enhanced. Application of probiotics and Chinese herbal medicines for disease prevention and control during commercial fish breeding, avoiding the negative effects caused by long-term use of large amounts of antibiotics, such as environmental pollution, declining product quality, induced drug-resistant strains, etc., further raising the aquaculture efficiency and aquatic products. The security has enhanced the competitiveness of China's aquatic products in the international market and has a wide range of social and ecological benefits.
“Next, we will broaden the scope of the test area and application, and strengthen the development of pollution-free fishery drugs that are mainly based on Chinese herbal medicines.†Wang Yongqiang introduced.
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