Zinc is a component of many enzymes and participates in a series of physiological processes. When ducklings are scarce, their growth is slow, their feathers and skin are stunted, their leg bones are deformed, their egg production is reduced, and their hatching rate is low.
Iron and copper participate in the formation of hemoglobin, and ducks will be anemia when iron is insufficient. When copper is deficient, iron is poorly absorbed, and more embryos die during incubation.
Iodine is a component of thyroxine, which plays an important role in regulating the growth, reproduction and egg laying of ducks. Iodine deficiency can cause goiter and damage the health of ducks.
Selenium is one of the essential elements for animal life activities. Selenium deficiency was found in soil and feed in parts of northeast and northwest China, which led to selenium deficiency in livestock and poultry. Adding 0. 1 ppm selenium to the diet in selenium-deficient areas can meet the needs of young birds. When there is too much selenium, exceeding 5 parts per million, the growth of ducks is hindered, the hatching rate of eggs is low, and a large number of deformed embryos are produced.