تهديدات استبدال المكونات لصحة القناة الهضمية

1. Non-starch polysaccharides in wheat feed

Wheat, barley and other wheat raw materials contain a lot of soluble non-starch polysaccharides (see Table 1), which leads to an increase in water consumption and an increase in the viscosity of the chyme after the chickens eat, which not only hinders the physical contact between digestive enzymes and nutrients in the feed, It also leads to the rapid proliferation of Clostridium perfringens, which induces necrotizing enteritis. There is a strong correlation between the amount of wheat and barley in the feed and the incidence of necrotizing enteritis in chickens

2. Mycotoxins in agricultural and sideline products

Mycotoxins are very harmful to the digestive system of chickens. Digestive tract damage caused by mycotoxins not only directly affects the digestion and absorption of nutrients, but also increases the intestinal sensitivity to bacteria, viruses, coccidia and other pathogens. In poultry feed ingredients, corn, wheat, barley and other grains tend to have high levels of mycotoxins. When corn is substituted, the by-product raw materials such as corn distiller’s grains and corn husks are affected by the content of mycotoxins in the raw materials used for processing and the concentration effect during the processing. important reasons. Therefore, in the process of raw material replacement, the dosage should be controlled according to the level of mycotoxins and the mold release agent should be added appropriately.

3. Poultry has low protein digestibility of miscellaneous meal

In the process of soybean meal replacement, one or more miscellaneous meal or by-product raw materials are often introduced. These raw materials tend to have lower protein digestibility than soybean meal. The end-ileal digestibility of protein from miscellaneous meal and corn processing by-products of laying hens is generally 10-20% lower than that of soybean meal. The protein digestibility is reduced, and the underdigested protein enters the hindgut and is abnormally fermented by harmful bacteria, causing the intestinal flora disorder of poultry, resulting in diarrhea and intestinal damage, and the digestion and absorption rate of nutrients decreases.

Miscellaneous meals such as rapeseed meal, cotton meal and sunflower meal contain more anti-nutritional factors such as phytic acid and gossypol. These anti-nutritional factors cause damage to the poultry gut and reduce the digestibility of nutrients, thereby limiting their application in poultry feed.

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