In general, the finer the mineral element premixed additive is pulverized, the more uniform the mixing, the better the feeding effect. Various mineral trace element additives must have a fineness of at least 60 mesh. After the energy and protein feed are pulverized, the contact surface between the feed and the digestive juice of the livestock and poultry can be increased, and the digestibility of the feed can be improved; however, it is not suitable to be pulverized too much, resulting in insufficient chewing of the livestock and poultry, and uneven mixing of the saliva, which hinders digestion. The fineness of the feed should vary depending on the type of livestock.
Chicken feed should not be too fine, because chickens like pellets or broken cereals can be used in combination. Rice and broken rice can be directly added into the mixer in granular form. The crushing fineness of wheat and barley is preferably less than 2.5 mm, and corn, brown rice and bean cake should be processed into powdery material. When laying soft-shelled eggs for laying hens requires calcium supplementation, it is desirable to feed granulated calcium, that is, to grind limestone, shells, etc. into granules of high sorghum size, and feed them again every night when feeding the last granule. Because the granular calcium stays in the chicken for a long time, it is beneficial to the absorption and utilization of the chicken body, so the calcium supplementation effect is good.
Piglets are better prepared with special pellets or granules. Beans and other energy feeds can be cooked by frying. Piglets under 25 kg can be fed to ordinary piglets; The degree can be controlled within 2 mm. Feed the pig's feed, the finer the better.
The fineness of the concentrate of cattle and sheep can exceed 2 mm, because the cow can ruminate, the feed is slightly thicker, which is good for ruminating and improve the digestibility of the feed. The feed of old cattle and sheep can be crushed to less than 1 mm to facilitate digestion.
The pulverization fineness of the feed should take into account the type of livestock and poultry, and also consider not smashing the fat-rich grain feed such as corn, oats, etc., and storing it for too long to avoid rancidity.
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