4后续加工对猪饲料颗粒大小的影响正如上文所述,日粮中的饲料颗粒大小通过粉碎可以调整至最佳状态,但若猪饲料生产还有后续处理步骤,如制粒、挤压或膨化,饲料颗粒大小则可能会发生显著的变化。制粒是将饲料颗粒凝聚成更大的块状体,它同时会减小饲料颗粒的大小(Svihus等,2004;Grosse Liesner等,2009)。在Vukmirovi?(2015)的研究中,玉米使用锤片式粉碎机或滚筒式粉碎机 4 Effects of Follow-up Processing on Pig Feed Particle Size As mentioned above, feed particle size in a diet can be adjusted to optimum conditions by comminution, but if pig feed production has subsequent processing steps such as granulation, extrusion or Puffing, feed particle size may change significantly. Granulation is the agglomeration of feed particles into larger lumps, which at the same time reduces the size of the feed particles (Svihus et al., 2004; Grosse Liesner et al., 2009). In a study by Vukmiroviño (2015), maize was pulverized using a hammer mill or drum mill