Second, the lack of vitamin D3 in feed.
3. The imbalance of calcium and phosphorus in feedstuffs, the requirement of calcium in duck diets is 3.6%-4%, and the available phosphorus is 0.48%. Phosphorus in diets with too high or too low levels will affect the normal ratio of calcium and phosphorus. Causes ducks to absorb calcium and produce thin soft shell eggs.
Fourth, the stress during the laying period, the mother duck by external frightened, will reduce the quality of the shell, produce thin soft shell eggs.
Fifth, with the duck to the late stage of egg production, especially for the ducks left in spring, the high temperature in the summer and the late period of laying, the egg production and egg shell quality will all decrease, and the production of thin soft shell eggs will increase.
At ancient times, people picked up wild fruits, and they found the magic of Goji , The pictograph word "qi" in Chinese character just like a man knelt down at a Goji tree , the left of the character "qi" seems like a tree, and the right like a person bowed down. That means as early as four thousand years ago, people found that Goji can keep fit and role of longevity ,Goji has magic power to people`s life.
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