Catalyst refers to a substance which can change the reaction speed in a chemical reaction and whose composition and mass remain unchanged after the reaction. The catalysts that speed up the reaction are called Positive Cata-lyst and the slower ones are called Negative Cata LYST or moderators. Generally speaking, the catalyst is to correct the catalyst. These catalysts are widely used in industry, especially in organic chemical industry. They are of great significance, for example, catalysts are needed for the preparation of sulfuric acid by contact method, the hydrolysis of synthetic ammonia, esters and polysaccharides, and the hydrogenation of oils and fats. Commonly used catalysts are metals, metal oxides and inorganic acids. If the catalyst is a solid, the reactant is a gas, forming a heterogeneous catalytic reaction, this catalyst, sometimes called a catalyst or contact agent.
Auxiliaries refer to the industrial and agricultural production, especially chemical production, in order to improve the production process, improve product quality and output, or give the product a unique application performance, usually need to add some auxiliary chemicals. It is a kind of important auxiliary raw materials in chemical production, which can give the products special properties and improve the use of finished products, accelerate the chemical reaction speed and improve the yield of products, save raw materials and improve the processing efficiency. It is widely used in chemical industry, especially in organic synthesis, synthetic material processing and petroleum refining, pesticides, pharmaceuticals, dyes, coatings and other industrial sectors. By use, it can be divided into synthetic auxiliaries and processing auxiliaries. Auxiliaries used in the synthesis and polymerization of resins, fibers, rubber and other monomers are called synthetic auxiliaries, including catalysts, initiators, solvents, dispersants, emulsifiers, polymerization inhibitors, regulators, terminators, etc. Auxiliary chemicals used in the manufacture of rubber, plastic products and in the spinning and spinning of chemical fibers are called processing aids, including plasticizers, heat stabilizers, antioxidants, light stabilizers, flame retardants, foaming agents, lubricants, demoulding agents, vulcanizing agents, accelerators, softeners, anti-scorching agents. Agents, surfactants, oils, fillers and so on. Many of these Additives are dangerous chemicals, such as diphenyl peroxide, azodiisobutyronitrile, hydrogen peroxide-ferrous blue, alkyl aluminum, titanium chloride and other initiators, catalysts are inflammable and explosive materials, should be stored and transported in accordance with the relevant provisions of the Regulations on the Safety Management of Chemical Hazardous Goods. Management and use.
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2. Standardized breeding and management of breeding pigs and pigs. Choosing good breeding pigs can only achieve the purpose of selecting the quality of breeding pigs. Only when the husbandry and management work is done at the same time, can we give full play to the advantages of excellent quality of breeding pigs. Our province has formulated feeds, breeding and mating for various breeding pigs and pigs. Disease prevention and control technical specifications, as long as the technical specifications to do, will be able to produce high-quality pigs.
3, timely listing slaughter. In order to obtain the best growth rate and pay for the production of pigs, producers should choose the timing of the best slaughter of pigs. When the pigs reach 90-100 kg, they will be slaughtered on the market. If they continue to feed only long fat and no fleshy meat, the lean meat ratio will be low, which will affect the quality of the pigs and reduce the economic benefits.
Quality and efficiency of hog feeding measures
1. Select good breeding pigs and use the best combination of pig production. Domestic pigs are generally selected from Duroc Changbai local or Duroc Dabai local pigs, that is, Landrace pigs or Large White pigs are used as the first paternal pigs, and local pigs are used as the first female pigs to produce long-origin or Big-nose sows. Then use the Duroc boars and long or big sows to produce pigs. The combination has strong propagative power, fast growth, good feed compensation, relatively extensive feed and feeding, and low production cost. For exporting hogs, the combination of Duroc Changbai Dabai is preferred. This combination is the best, but the cost is high. It requires high feeding conditions and management, and is more suitable for large-scale export markets.