水稻在吸湿环境中的裂纹生成研究进展及应用

Fissure Development of Rice in Moisture-Absorbing Environment: Research Progresses and Applications

当低水分的水稻暴露在可吸湿环境中就有可能产生裂纹;带有裂纹的水稻籽粒在碾磨加工中通常会断裂,从而降低整米产量。外界环境中相对湿度的变化比温度变化对裂纹生成有更大作用。水稻籽粒自身的抗裂能力与其物理性状和化学成分有关。通过改善产前产后加工技术,可以避免或减轻低水分水稻籽粒所遭受的各种潮湿环境危害,减少碎米率,提高稻米品质。

Low moisture rice grains will be fissured when exposed in moisture - absorbing environment. Fissured rice grains are broken more easily in milling, causing the reduction of head rice yield. Relative humidity changes have much greater effect on rice fissuring than that of temperature of environment. The rice resistance to fissuring is controlled by the physical characteristics and chemical composition of the grains. The demage of low moisture rice caused by moisture absorption would be prevented or alleviated by the improvement of preharvest and postharvest technology, resulting in reduction of the rice breakage in milling and better rice qualities.