1, grain feed or granular ingredients, in the high temperature of 160-187 °C air, heating 1-2 minutes, so that the moisture within the grain heated to the evaporation point, so that the grain feed expansion, volume than the original increase of 30% -40 %, then crush the chicken. Tests have reported that feeding extruded chicks can increase feed utilization.
2, Gu Shi feed soaked overnight, at a temperature of 20-27 ° C, dark place germination, can make starch saccharification, protein and soluble B vitamins content increased, palatability improved. Allegedly, the addition of germinated barley in the winter can increase chicken egg production by 10%-12%. It has been reported that normal sorghum lacking lysine germinated at 30°C for 3-4 days, and lysine, methionine, and tryptophan in sorghum increased by 2.2, 1.8, and 5.7 times compared with those before germination, respectively.
3, beans, potatoes, cereals (for ducks) and animal feed (such as oysters, raw fish, etc.) after cooking, can increase palatability, easy to digest, and can kill harmful bacteria . However, the feed cooking time is too long, protein coagulation is not digestible, vitamins are destroyed, but the nutritional value is reduced. Therefore, whether cooking depends on the specific circumstances.
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