所谓乳白米，就是胚乳的某一部位呈现白色不透明状的糙米粒。这种糙米粒虽然可分为未熟腹白粒、基白粒、背白粒等１２种类型，但都具有如下的共同特征：胚乳的淀粉蓄积量不充分，淀粉间的排列有空隙，所以从外表看是白色不透明的；同时此种糙米的容重轻，用它磨制的精米破碎粒 The so-called milky white rice, is a part of the endosperm white opaque brown rice. Although this kind of unpolished rice grain can be divided into 12 kinds of unripe belly white grain, base white grain, dorsal white grain and so on 12 kinds, but all has the following common characteristic: The endosperm’s starch accumulation is insufficient, the starch arranges the void, therefore from Appearance is white opaque; at the same time the weight of light brown rice, polished with it polished rice grain