Pig raising costs include the construction of pig farms, the purchase of breeding pigs, feed, and medicines, as well as labor, among which feed costs account for about 70%, which is the largest investment in pig production. With the increase in the price of feed ingredients, the proportion of feed costs in the cost of raising pigs is also increasing.
When the difference in the price of soybean meal relative to the price of corn increases, farmers will consider feed costs. The cost of livestock and poultry feed production depends largely on the price of the protein source, and the efficiency of the protein is maximized by the optimal amino acid balance, which is critical for reducing the use of expensive protein materials in feed. Using the “ideal amino acid model†as a measure of the actual use of the diet, it was found that if corn-soybean meal was used as the basis for formulating diets to meet the nutritional requirements of NRC (1998) pigs for protein, the dietary essential amino acids required There is no exact unity between them, resulting in wasted protein material and higher formulation costs. Therefore, the feed formulation personnel must use the "ideal amino acid model" to include the ratio of other essential amino acids and digestible lysine to the selection of nutrition indicators to reduce feed costs and also effectively reduce the excretion of nitrogen in the manure.