The eggshell of the egg accounts for 12% of the total weight of the egg, and the content of calcium in the eggshell of each egg is about 3 grams. There must be sufficient calcium in the feed to meet such high demand. Insufficient calcium can lead to a decline in the laying ability of hens and an increase in egg breakage rate, which jeopardizes farm profits.
In the egg production process, the supply of calcium has two extremely important stages: the cultivation period and the late egg production. As we age, the ability of the hen's intestine to reabsorb calcium will decrease, which will worsen the problem of eggshell stability. It is estimated that approximately 7% of eggs do not arrive at their destination intact during transport. In addition to age, house conditions, genetics, egg collection systems and packaging, the main factor determining the quality of eggshells is feed. Animal nutrition experts can't just guarantee that the supply of calcium is sufficient; it is also important to ensure the source of calcium.
The prebiotic acid (PreAcid), a probiotic feed acidifier from Dr. Eckel, an alternative feed additive company, is an innovative solution to optimize calcium absorption in laying hens. The pre-acid is a combination of a highly available calcium source, a prebiotic component, butyrate, gluconate and an organic acid. Monogastric animals are basically unable to digest gluconate, so gluconate will remain in the intestines and become a source of food for lactobacilli and bifidobacteria. Microbial fermentation produces butyric acid, which is rapidly absorbed by the large intestinal mucosa. The energy provided by butyric acid can be used directly by intestinal epithelial cells to promote the growth of these cells. The effectiveness of pre-acids in the utilization of calcium has been confirmed by the results of two experiments.
In the first experiment at the University of Georgia (USA, 2014), a certain amount of pre-acid (0.8%) was added to the hen's feed. After 21 days, the development of the intestine was measured by estimating the depth of the crypt (intestinal gland) and compared with the positive control group.
By comparison, the crypts of the small intestine end (jejunum and ileum) of the pre-acid group were more prominent. The prominent crypts increase the surface area of ​​the intestinal wall and increase the intake of nutrients in the feed. Therefore, the pre-acid prevents the decline in the quality of the egg shell.
Another study concluded that supplementation with pre-acids can reduce egg breakage rates.
The experimental results show that pre-acid can have a positive effect on intestinal tissue and improve the stability of eggshell. These studies have found opportunities for the production efficiency and profitability of modern egg products to meet the demand for high quality products and to increase consumer acceptance of products.
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