There are great differences in the understanding of sorghum barley grain size. According to the self-mixing data of Australian feed mills and farms, the difference in sorghum barley grinding process is likely to lead to low production efficiency of pigs. The in vitro starch digestion test proves that the larger the grinding particle size, the lower the digestibility, and the grinding particle size of sorghum or barley should not be larger than 1mm. Other studies have concluded that the ideal particle size for both hard and soft sorghum is 300 to 500 microns. But as pigs and chickens age, the ideal particle size increases. The editor believes that the crushing particle size of sorghum and barley should be based on the principle that conditioning is more suitable. The particle size is small, the feed contact surface per unit weight is large, and the conditioning is more sufficient, so the crushing particle size of sorghum and barley feed is not easy to be too large (it is recommended that the sieve hole is not larger than 1.2mm. ). It is generally believed that the hammer mill can reduce the grinding particle size better than the roller mill.

The moisture content in the powder before conditioning is a very important parameter, which has a great influence on the quality of feed products, feed processing efficiency, equipment loss, animal absorption of feed nutrients and animal production performance. Sorghum and barley require higher temperature and low humidity steam for conditioning and conditioning, so for better conditioning and granulation, the moisture content after mixing is particularly important. The editor thinks that the water content after mixing should be controlled at about 12-12.5%, because the best granulation water content is 15%-16.5%. For every 1% increase in water content, the temperature of the material will increase by 11 degrees. Therefore, the water content is too low after mixing, and the material temperature cannot reach the optimum temperature. When the water content is too low after mixing,

The moisture content in the powder before conditioning is a very important parameter, which has a great influence on the quality of feed products, feed processing efficiency, equipment loss, animal absorption of feed nutrients and animal production performance. Sorghum and barley require higher temperature and low humidity steam for conditioning and conditioning, so for better conditioning and granulation, the moisture content after mixing is particularly important. The editor thinks that the water content after mixing should be controlled at about 12-12.5%, because the best granulation water content is 15%-16.5%. For every 1% increase in water content, the temperature of the material will increase by 11 degrees. Therefore, the water content is too low after mixing, and the material temperature cannot reach the optimum temperature. When the water content is too low after mixing,