Protein is the foundation of all life and it is an essential substance for the growth and reproduction of animals. Without protein, life cannot exist. The body tissues of ducks such as muscles, bones, internal organs, skin, and feathers contain a lot of protein, and the life activities of ducks and the tissues and organs need protein. Proteins are composed of various amino acids. More than 10 of the amino acids needed for ducks cannot be synthesized by themselves and must be provided by feeds, such as lysine, methionine, citrate, tryptophan, leucine, isoleucine, Threonine, arginine, valine, phenylalanine, glycine, etc. Such as lack of protein in the diet, young ducks, loss of appetite, poor growth; female ducks reduce egg production, eggs, hatching rate of low eggs. In the event of a serious lack of weight loss or even death. Therefore, there must be sufficient protein in the diet, and in particular, the necessary amino acids must be considered. The essential amino acids contained in animal proteins are relatively complete and the content is also high. Feeding with several feeds can promote its growth. The protein content of the diet in ducks varies depending on the stage of growth, the duration of production, and the duration of the offspring. Ducklings require high levels and decrease with increasing age; female ducks require relatively high protein content at the time of laying, and the duration of the perinatal period may be lower. Vibration Welding Machine,Sonic Welding Machine,Ultrasonic Welding Equipment,Spot Welder Ult Dongguan Jinwang Ultrasonic Equipment Co.,Ltd , https://www.jwultrasonic.com