Compound premix for pigs is an intermediate product made of a variety of feed additives according to a certain proportion, which aims to let users prepare full price feed by themselves. The standard of general terms for feed industry issued by China's Technical Supervision Bureau defines feed additives as follows: "a small amount or trace of nutritive or non nutritive substances added to feed to meet the special needs of livestock and poultry (such as improving feed utilization rate, ensuring or improving feed quality, promoting animal production and ensuring animal health).
1、 Classification of feed additives
There are different opinions on the classification of feed additives, and different scholars put forward different classification methods. Based on years of grass-roots practice, the author thinks that feed additives can be divided into the following three categories, which are more easily accepted by grass-roots workers.
1. Nutritive feed additive
There are mainly amino acid additives, vitamin additives, mineral additives and so on. The purpose of this kind of additive is to supplement the deficiency of the basic diet nutrients, so as to make the diet reach the nutritional balance, that is, the total price.
2. Pharmaceutical feed additive
There are mainly antibiotic additives, hormone additives, anthelmintic agents, antibacterial growth promoting agents, microbial agents, Chinese herbal medicine additives and so on. It is forbidden to use hormones and tranquilizers as feed additives in China, and β - stimulants with the purpose of increasing lean meat rate of pigs are not allowed. The effect of this kind of feed additive is mainly to enhance immunity, promote growth and improve economic efficiency. There are strict regulations on the use of antibiotics in EU, and abuse of antibiotics is prohibited in China, which should be carried out in strict accordance with the regulations on Administration of feed and feed additives.
3. Additives for improving feed quality
There are mainly antioxidants, fat inhibitors, mildew inhibitors, seasoning agents and so on.
The purpose of supplying pigs with full price feed is to improve the feed conversion rate of livestock and poultry, which is the desire and requirement of the majority of breeders. Under the condition that energy and protein are basically satisfied, the full price of compound feed can be improved by using proper amount of additives such as amino acids, vitamins and trace elements, so as to reduce feed consumption, improve production level and economic benefits.