水稻收割时期、干燥速度与产生裂纹米的关系  

Corelation of rice reaping period, drying rate to producing cracked rice-grain

作　　者：王鹄生[1] 

机构地区：[1]中国科学院长沙农业现代化研究所

出　　处：《湖北农业科学》1996年第1期13-16,共4页Hubei Agricultural Sciences

摘　　要：稻谷黄熟８５％～９０％、稻谷水分２３％～２５％时为适时收割期。过早收割不仅产量低，而且青米、基白米多；过晚收割，特别是晴雨突变，裂纹米、茶色米多，透明度低，光泽差，食味变劣。干燥速度过快（减干率在０．８％／ｈ以上）或形成过干燥米，均严重地产生裂纹米。裂纹米在精白过程中几乎全部变为碎米、屑米，造成外观品质低下，食味品质变劣，形成等外级米，蒙受巨大经济损失。lt is optimum reaping period when 8 5%～90%of unhusked rice become yellow and watercontain account to 23%～25%, Reaping in advance not only result in lower yeild but also much green rice-grain and top-bottom white rlcegrain. Later reaping result in much cracked rice-grain and tea-colour rice-grain,lower transparency,bad luster,thus bad taste,Rapid drying rate sharply result in currence of crackedrice-grain. Because almost all cracked rice-grain become fragmentary rice and rice polishings in the whitenprocess;Correspondly,appearance quality and taste quality become bad, thus resulting in serious economicloss.

关 键 词：水稻 收割时期 干燥速度 裂纹米 刚度 含水量 

分 类 号：S511.109.1[农业科学—作物学]