Mold adsorbent——MeiQing

As far as stale corn is concerned, its advantage is low moisture content. The moisture of corn stored for more than one year is generally below 12.5%. The starch is further matured during the storage process, which is beneficial to improve the digestion and utilization of animals. The disadvantage is that the storage process is also accompanied by the loss of nutrients, such as riboflavin, and with the extension of storage time, corn oil is slowly oxidized and deteriorated under the action of air and moisture, which not only affects the freshness of corn, but also in severe cases. Affect its palatability.
For new corn, fresh and delicious, comprehensive nutrition is its biggest advantage. The processed corn flour has bright yellow color, fresh smell, good palatability, and less loss of nutrients such as various amino acids, vitamins, and fatty acids, and can be used by cattle and sheep. Its shortcomings, but also need to pay special attention to two points: one is that the new corn starch has a post-curing process; the other is that the moisture content is usually higher, some even as high as 30%, which is not suitable for storage, and it is prone to insect damage and mildew. The newly harvested corn has a relatively high content of resistant starch. This part of the starch is difficult to digest and utilize by animals, and even causes the animals to feel full. On the contrary, it reduces their feed intake. If they are used directly, their growth performance will be affected.
The key to corn acceptance is to control the four major indicators of moisture, bulk density, mold growth or mycotoxin content, with sensory and other nutritional indicators as an aid for screening. This year, during the harvesting and storage period of corn, the producing area was rainy, the mold growth in the field was serious, the mycotoxin content was also high, and the overall quality was poor.

Therefore, it is recommended that the new corn wait for the maturation process to be basically completed (40-60 days), and then use it after the moisture drops to about 14%. Of course, from the optimization of the technical formula, the reasonable combination of new corn and stale corn, corn and non-corn raw materials, the selection of special additives such as Qun Zhuang, and the use of expanded fermentation technology can also reduce the feeding effect of resistant starch in new corn. To achieve the goal of increasing feed intake and feed efficiency at the same time.

In addition to the use of new and old corn, we must pay attention to the prevention and control of mycotoxins. For cattle and sheep, the same raw material is silage. Are you familiar with this situation: the newly opened cellar silage corn has good fermentation, yellow-green color, aromatic wine sourness, and good palatability. However, immediately replace the dairy cow's diet with this "new" silage corn Corn silage in previous years will lead to a decline in milk production. In the next few months, despite your many efforts, the herd production still cannot return to its previous normal levels.

The main material of most adsorbents is aluminosilicate. Aluminosilicate is an oxygen-containing acid salt mineral formed by the connection of silicon-oxygen tetrahedron and aluminoxy octahedron by sharing oxygen. Aluminosilicate minerals have a large specific surface area, and some have hydrophilic negatively charged surfaces. There are a large number of nanopores and exchangeable cations in the three-dimensional structure. The high-valent cations can be replaced by the low-valent cations to make the charge in the layer Unbalance, forming a negative charge adsorption center, which has the ability to adsorb various cations and polar molecules.
However, aluminosilicate can only adsorb mycotoxins with strong polarity, and has poor adsorption effect on weakly polar toxins such as DON (vomiting toxin) and ZEA (zearalenone). The cell surface of lactic acid bacteria is hydrophobic. Some lactic acid bacteria can adsorb AFB1 and ZEA through the action of cell wall peptidoglycan, polysaccharide and teichoic acid and toxins in the small intestine. The amino acid composition of the cell wall of lactic acid bacteria directly affects its resistance to low-polarity toxins (ZEA, DON). Adsorption stability.
Bacillus subtilis and its metabolic enzymes can degrade aflatoxins, zearalenone and vomiting toxins in the feed and reduce the toxicity of the toxins.
MeiQing is a mold adsorbent that integrates physical adsorption, biosorption and biodegradation. Conventional feed is added at a ratio of 1‰ to achieve the purpose of preventing mycotoxin poisoning; for feeds with mild mycotoxin contamination, 1.5‰ of MeiQing can be added to achieve the effect of mold prevention and detoxification.