The feed and nutrition of raccoon dog-2. Protein

Protein is a complex organic compound. It is mainly composed of four elements: carbon, hydrogen, oxygen and nitrogen, and some also contain a small amount of sulfur. Some proteins also contain trace elements such as iron, copper, iodine, calcium and phosphorus. The basic structural unit of a protein is the need for amino acids.

For raccoon dogs, there are 8 essential amino acids, namely methionine, tryptophan, threonine, valine, phenylalanine, leucine, isoleucine and cystine. The sulfur-containing amino acids directly related to the growth of fur are methionine, cystine and semi-amino acid.

Protein is of special significance in the nutrition of raccoon dogs. It is the main component of various tissues of raccoon dogs, and its role can not be replaced by fat and carbohydrates. In life activities, various and tissues need proteins to repair updates; sperm eggs and produce need proteins; enzymes, hormones, pigments and antibodies needed in the process of metabolism are also mainly composed of proteins. Secondly, when there is a lack of carbohydrates and fats in the diet, the protein in the body can also be decomposed and oxidized to produce calories; when there is excess protein in the diet, it can also be stored in the liver, blood and muscle, or converted into fat storage, so that it can be used when nutrition is not good.

The nutritional value of protein mainly depends on the quantity and proportion of amino acids, especially essential amino acids. Proteins that contain all essential amino acids have high nutritional value and are called full-valent proteins; proteins that contain only some essential amino acids are called non-full-valent proteins. The essential amino acids of protein in most drinks are incomplete, so when the type of feed in the diet is single, the utilization of protein is not high. When more than two kinds of feed are mixed and matched, the different amino acids will complement each other, so that the essential amino acids in the diet tend to be complete, so as to improve the utilization and nutritional value of feed protein, which is called amino acid complementarity.