Feed safety is related to food safety. Feed is the main input of animal husbandry production, and its quality and safety is the cornerstone of the quality and safety of livestock products, and is the guarantee that supports food safety and healthy China. In the long history of the Chinese nation, animal husbandry has always occupied a very important position. Since the reform and opening up, China's feed industry has developed rapidly, and has become the world's largest feed producer, which has played an extremely critical role in promoting the development of animal husbandry and ensuring the supply of meat, eggs and milk to residents. However, at the beginning of this century, the occurrence of safety incidents of livestock products such as clenbuterol and melamine directly endangered the safety of livestock products and the health of the people.
Qin Yuchang, a researcher at the Beijing Institute of Animal Husbandry and Veterinary Medicine of the Chinese Academy of Agricultural Sciences, takes it as his duty to ensure the quality and safety of feed, starts from the two major feed safety problems of illegal addition and biological pollution, leads the research team to bravely shoulder the heavy burden and overcome difficulties, and carries out long-term and systematic research on key technologies such as threshold and limit of illegal feed additives, detection and control of harmful microorganisms, nutritional fidelity and cleaner production in the processing process, quality and safety early warning and traceability, and builds a "raw material detection, processing control and product traceability" The feed quality and safety control technology system of the whole industry chain has played an important role in ensuring the quality and safety of feed and livestock products, and has effectively promoted the sustainable and healthy development of China's feed industry and animal husbandry.
He was ordered to formulate melamine limit standards
The establishment of melamine limit standards in feed is the basis and criterion for combating illegal additions. After the Sanlu milk powder incident in 2008, melamine became the culprit affecting the safety of milk products, but due to its unclear environmental background and unclear metabolic residues, it was impossible to crack down on illegal additions. At this very moment, Researcher Qin Yuchang was ordered to face difficulties in the face of danger, with a scientific and rigorous work attitude, a serious and responsible work style, and a strong sense of mission and urgency, presided over the formulation of melamine limits in feed. He quickly organized experts in animal nutrition, toxicology, detection and traceability technology and risk assessment and other related majors, set up a special working group, and organized the research team to analyze the feed raw materials and the background value of melamine in the environment after more than half a year of continuous struggle, revealed its metabolic residue law in animals such as cattle and sheep, established a melamine risk assessment method in feed based on "environmental migration - accumulation of livestock products - population exposure" as the core, and formulated the limit standard of melamine in feed for the first time in the world. This standard has been adopted by the Chinese government, the United Nations Codex Alimentarius Commission and the World Health Organization, which solves the regulatory problems of the coexistence of melamine environmental background and illegal addition in feed, plays a key role in timely control of the illegal addition of melamine in the production of livestock products, and lays a methodological basis for the risk assessment of illegal additives with environmental background.
Overcome difficulties to create a hazardous substance detection technology system
The establishment of hazardous substance detection technology system is a prerequisite for ensuring the quality and safety of feed, the lack of testing standards, it is difficult to achieve effective prosecution, quality and safety can not be talked about. Qin Yuchang's team of researchers started from the detection and control of harmful substances such as illegal additives, harmful microorganisms and mycotoxins, studied the residual laws of prohibited additives such as ractopamine in the urine, hair, tissues and organs of cattle and sheep, created a new detection technology with hair as the target, and realized the rapid non-destructive detection of ruminant "clenbuterol"; using nano gold and graphene new materials, created a plasma resonance specific detection chip on the surface of "clenbuterol" molecular imprint Established more than 20 kinds of main harmful microorganisms in the feed detection methods, formulated salmonella, listeria, staphylococcus, Shigella and other detection method standards, 3 of which filled the domestic gap, guaranteed the implementation of the "Feed Hygiene Standards", provided strong support for the early warning and monitoring of harmful microorganisms in China's feed; the use of immunoaffenia column purification - reversed phase hplc column separation technology, innovative feed mycotoxin detection methods, the formulation of corn gibberellone detection method national standards. The testing technology formed by the above achievements has been fully promoted and applied by feed quality inspection institutions and production enterprises at all levels in the country, and has played an important supporting role in improving the quality and safety level of feed in China.
Crack the problem of both harmful factor reduction and nutrient fidelity
Qin Yuchang's team of researchers started from the aspects of anti-nutrient reduction of feed raw materials, cross-pollution prevention and control in the production process, heat-sensitive nutrient fidelity, etc., systematically studied the content distribution of the main anti-nutrient substances in feed raw materials, and created the optimal pretreatment extrusion extrusion process technology for different raw materials differentiation, so that the content of major anti-nutrient substances such as trypsin inhibitors in soybeans and soy globulin, free cotton phenol in cottonseed meal, and thiosides in rapeseed meal was significantly reduced, breaking through the bottleneck of limited use of unconventional protein raw materials The study reveals the reduction law of harmful microorganisms such as mold and E. coli in the feed processing process, proposes the process technology of effectively killing harmful microorganisms, and leads the development of clean feed production technology in China; the study determines the upper limit of cross-contamination control of pharmaceutical additives, formulates the national standard of "Specification for Cross-contamination Prevention and Control of Feed Processing Equipment", and provides a comprehensive solution technical solution for the prevention and control of cross-contamination of feed products; systematically studies the loss rate of heat-sensitive substances such as vitamins and enzymes under different thermal processing conditions. Invented a new process for the production of livestock and poultry feed with high temperature tempering and maturation of powder, sterilization treatment, and then add heat-sensitive substances for low temperature granulation, realized the efficient synergy between harmful substance reduction and nutrient fidelity, cracked the technical problems that are difficult to balance high temperature sterilization and nutritional fidelity, built a comprehensive evaluation mode of feed processing technology parameters with pellet feed processing quality, feed nutritional value, and animal production performance as indicators, and established the optimal processing technology parameters for broilers, laying hens, weaned piglets, and growth and fattening pigs. Achieve nutritional fidelity and precise processing of feed products. The processing guarantee technology formed by the above results has improved the quality of feed products, improved the transformation efficiency, ensured the quality and safety, and realized the cleaner production of feed and the improvement of quality and efficiency.
Cohesion to achieve feed quality and safety risk early warning and traceability
In view of the low degree of informatization and traceability of the whole process of feed production, the dispersion of basic data for quality and safety early warning and monitoring, and the backward analysis method, Qin Yuchang's team of researchers innovated the quality and safety traceability management technology of feed processing process, developed a feed quality and safety management system based on bar codes, realized the informatization and traceability of the whole process of "raw materials - processing - products", and created a feed quality and safety database covering feed hazard factors, raw material processing characteristics, and processing process parameters. It provides important basic data for the accurate design of feed product formula, processing technology optimization and feed quality control; establishes the only feed quality and safety early warning and monitoring platform in China, realizes the dynamic analysis and early warning monitoring of feed quality and safety, and provides a strong technical support for the early warning and daily supervision of feed quality and safety risks.
Ride the wind and waves to set sail, spring and autumn for twenty years. After years of dedicated research and innovation, Qin Yuchang's team of researchers has closely focused on the key issues of feed quality and safety, external prevention of illegal additions, internal control of pollution risks, breakthroughs in detection and control, processing guarantees and other key technologies, and integrated the construction of a quality and safety control technology system covering the whole process of feed production and meeting the needs of "production" and "management", providing strong scientific and technological support for ensuring the quality and safety of livestock products and meeting the people's yearning for a better life.