当米拉中水分的分布不均一的时候，就会出现米粒裂缝，产生碎粒米等情况。致度米粒的品质劣化。因此，将米粒分为皮部、胚芽部、胚乳部等五个部分，用混水的方法测定了五个部分的水分扩散系数。测定的结果表明，各个部分的扩散程度是不一样的。测定发现．米粒的水分含量增大， When the distribution of water in the rice is not uniform, there will be cracked rice, produce pieces of rice and so on. Degradation of rice grain quality deterioration. Therefore, the rice is divided into five parts of the dermis, germ, endosperm and so on, and the water diffusion coefficient of the five parts is measured by the method of mixed water. The results show that the degree of diffusion of various parts is not the same. Determination found. Rice grain moisture content increases,