不同缓苏条件对稻谷爆腰率影响的研究

研究了干燥时间、缓苏温度及缓苏时间对稻谷爆腰率的影响。结果表明，干燥时间越长，干燥后72h爆腰率越高。缓苏可有效地抑制稻谷爆腰率，干燥50min后，40℃、60℃、80℃三种缓苏温度都可有效抑制爆腰率，使爆腰率降低88．6％。干燥90min后，稻谷水分含量为14．5％，40℃缓苏后爆腰率仍迭到了76％，80℃缓苏后爆腰率仅为8％，可见高温缓苏抑制效果更佳。缓苏温度越高，缓苏效果越好，提高缓苏温度可缩短缓苏时间。稻谷干燥时间延长，应相应地提高缓苏温度，增加缓苏时间。

THE INFLUENCE OF DIFFERENT TEMPERING CONDITION ON FISSURE RATIO OF RICE

The effect of drying duration, tempering temperature and tempering time on the fissure of the paddy were researched. The results indicated that, as the drying process, the fissure ratio measured after drying for 72h, was increasing. Tempering can inhibit the generation of the fissure effectively. After drying for 50rain, tempering made the fissure ratio reduced 88. 6 %, compared to drying without tempering. After dr- ying for 90min, in 40℃C, 60℃and 80℃ when the moisture content was 14. 5%, the fissure ratio of the pad- dy which is tempered at 40＇C is 76%, while 8% when tempered at 80℃. Higher the tempering tempera- ture is, the more obvious the effect of temperingis. Raising the tempering temperature can Shorten the tempering time. Prolonging the drying time, longer tempering time is needed to keep fissure ratio lower, and the temDering temoerature should be raised.