The national "Tenth Five-Year Plan" scientific and technological research project "Research on key technologies for ruminant animal nutrition regulation" undertaken by the Institute of Ruminant Animal Nutrition of the Animal Husbandry Institute of the Chinese Academy of Agricultural Sciences achieved a major breakthrough after three years of joint research. The project has achieved three sets of nutrition requirements parameters for beef cattle, meat sheep, and meat goats, and a set of mechanisms for promoting growth of ruminants and nutrition regulation technologies in key technologies for nutrition regulation. Feeding goats and sheep concentrates for half-shelf feeding 2 sets of feed technology; 1 set of directional regulation technology for rumen microbial fermentation in ruminants; 1 set of molecular biology evaluation technology for rumen major functional bacteria; 1 set of rapid assessment technology for rumen microbial protein; 1 set of research and application technology for probiotic microorganisms in ruminants. These results have been applied to the production of 4 new products and applied for 3 national patents. Aiming at the large-scale cultivation of beef cattle and semi-fed feeding of meat sheep, the national agricultural industry standards “Feeding standards for beef cattle†and “Feeding standards for sheep and goats for meat†centered on small intestine absorbable protein and amino acids were completed. The standard provides a comprehensive, systematic and scientific stipulation on the nutrient requirements for beef cattle and mutton sheep at different feeding stages and at different production levels. It is very suitable for China's national conditions and has strong science, practicality, and maneuverability. All kinds of beef cattle and sheep breeding farms provide important scientific basis for formulating feeds and diets. The development of ruminant-promoting and growth-promoting new feed additives for ruminants based on cysteamine hydrochloride has the advantages of safety, high efficiency, and no pollution. The milk fat percentage is increased by 4%, the milk protein content is 3%, and the milk yield is 18 %%, 2002 Received a new product certificate for feed and feed additives issued by the Ministry of Agriculture; Rumen Fermentation Regulator product developed mainly with tea saponin improved feed conversion rate by 10%, increased weight gain by 15%%, reduced feed cost by 15% %; The number of viable bacteria in probiotic microbial cultures prepared by liquid culture-solid fermentation method was as high as 3,109/g, which could significantly increase protein digestibility of ruminants by 27% and daily weight gain by 11%; preliminary through molecular biology techniques A prototype of the rumen bacterial ecosystem tree was established, and representative probes of three major rumen fiber-decomposing bacteria were synthesized. A method for determining the number of rumen functional bacteria based on quantitative hybridization analysis of probes was established; beef was regulated by micronutrients Quality significantly increases the beef's intramuscular fat content, marbling grades, and beef quality levels. The "Research on the Nutritional Value of Ruminants' Main Feedstuffs", "Study and Application of Nutritional Protein, Amino Acid, Calcium, and Phosphorus Nutrient Requirements Parameters" and "Cattle and Sheep New Regulatory Feed Products and Their Efficient Utilization Technologies" by the Institute of Research and Development A number of research results have been formed as the core of "the promotion and application of ruminant new feed additive premixes and high-efficiency feeding technology," and the overall research has reached the international advanced level. In 2003, it won the first prize of the national agriculture, animal husbandry and fishery harvest prize. In response to the regularity of nutrient surpluses and losses in different regions, we have innovatively developed a series of beef cattle, sheep sheep special premixes, concentrates and concentrate supplements that are suitable for the typical dietary composition of ruminants in different breeding areas in China. The market share of the application market was as high as 36.7 percent, which greatly promoted the popularization and application of the technology system for the feeding of half-shelf feeding, reduced the ecological pressure on the grasslands, and significantly increased farmers' income. The advanced technological achievements obtained in the project have been widely used in project demonstration areas such as Beijing, Tianjin, Inner Mongolia, and Xinjiang. The scale of promotion has reached 1.145 million sheep units, and the added net income is 135 million yuan. The input-output ratio is 1:4.7. Social, economic and ecological benefits are significant. During the implementation of the project, 39 papers were published in domestic and foreign journals, 2 monographs were published, 25 doctoral students and 43 master students were graduated, which provided a solid talent pool for ruminant animal nutrition research.
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