A new idea for counteracting: the application of tannin in feed

In order to meet some special needs of laying hen breeding, we usually mix various micro-components with different biological activities into the feed. Tannic acid, as a natural polyphenol plant extract, has been gradually used by farmers in recent years. We are familiar with. From August 30th to 31st, sponsored by Xinmu.com·New Poultry Condition, the 2020 Brand Egg Summit Forum specially appointed by Ruipu Biotech (300119) and Huaduyukou Poultry Industry was successfully held in Guangzhou Huaju Grand Hyatt Hotel, Italy Guo Jiubin, senior technical service manager of Shico China, shared with the guests the application of tannin in layer breeding and its impact on egg quality.


What is tannin? Natural polyphenol extract

Under the background of anti-anti-antibiotics in recent years, various anti-antibiotic products in layer breeding have sprung up like bamboo shoots after the rain. Chinese herbal medicine, enzyme preparations, plant extracts...With so many anti-antibiotic products, we can How to choose? Tannin may be a good choice.

The chemical formula of tannin is C76H52O46, also known as tannin and tannic acid. It is a polyphenolic natural product that is widely found in plants and is second only to lignin. It has antibacterial, anti-oxidant, anti-inflammatory and improves intestinal microbe The role of the ecological environment has strong physiological activity and biological characteristics.

Tannic acid was originally described as a substance used in plant extracts to transform animal skin into stable leather. Later studies have found that almost all plants contain a small amount of tannic acid. In terms of structure and activity, tannic acid can be divided into two types: hydrolyzed tannic acid and condensed tannic acid. Hydrolyzed tannic acid is an ester composed of polygallic acid with tanning properties and polyols, while condensed tannic acid is not a single compound, it is a flavanol derivative with a more complex chemical composition, so it is generally added in feed. Hydrolyzed tannic acid.

In recent years, with the development of science and technology, hydrolyzed tannic acid can be extracted from plants by a variety of methods. Its extract was officially named tannic acid extract in 2005 and is widely used in food and feed. In the European Union, this chestnut tree plant extract passed the local feed additive management regulations as early as 2003, allowing it to be added to feed.


How to choose tannin products? Coated tannins have more advantages

With the gradual popularity of tannin extracts in layer breeding, the use of tannins has become more mature. Among them, studies have found that tannic acid adopts microencapsulated coating technology when used. Compared with tannic acid without coating technology, it can play a better role in the breeding process of laying hens, which is mainly reflected in coating tannic acid. Will not affect livestock and poultry feed intake and digestive enzyme activity.

However, there are still several problems with non-coated tannins: From the perspective of physiological functions, non-coated tannins have palatability problems, which affect the feeding of layers and at the same time affect the pepsin activity of layers (pH: 3.5~7.0) , Thereby reducing layer weight gain and feed conversion rate.

From the perspective of production and processing, non-coated tannic acid is easy to absorb moisture, which makes it difficult to mix evenly with feed; secondly, it is easy to be oxidized by heat, reducing the antioxidant function; finally, it is easy to affect the color of the material, especially when wet mixing .

Therefore, the use of tannin coating technology has more advantages in layer breeding, and the "replacement product"-tannin, developed by Italy Asco, uses advanced spray condensation coating technology to coat hydrolysis It is made of tannic acid, and the product after being "coated with microcapsules" can be slowly released at a fixed point along the entire gastrointestinal tract, effectively ensuring the release of the active ingredients of the product in the intestine.

Its addition in feed can prevent the active ingredients from being destroyed by external environmental factors during transportation, storage and processing. The microcapsule technology converts liquid active ingredients into solids, which is more conducive to the uniform mixing of feed. Coating through the stomach allows the active ingredients to be slowly released in the intestinal tract, which can reduce and avoid the combination of tannin and pepsin. The coated hydrolyzed tannins can improve the efficiency of the active ingredients. The added amount is low and the potency is high. It does not affect the palatability and can play a good role in replacing antibiotics.