稻谷自然晾晒后显微结构分析研究

通过研究自然晾晒后稻谷内部的显微组织结构，可以分析稻谷应力裂纹的生成扩展机理。通过扫描电子显微镜观察，发现自然晾晒后的稻谷胚乳组织结构遭到轻微破坏，产生应力裂纹，籽实皮与胚乳之间的结合区域也有应力裂纹产生。应力裂纹首先生成在胚乳组织的中心部位，然后向四周扩展。产生应力裂纹时，只是裂纹两侧的胚乳组织遭到破坏，其它部位的胚乳组织状态良好。大多数应力裂纹扩展的路径都是穿越细胞壁，沿着淀粉颗粒的边缘进行扩展。分析研究稻谷自然晾晒后胚乳组织的形态结构以及应力裂纹的显微形态、生成位置和扩展方向，对稻谷应力裂纹检测技术的提高和干燥品质的评价都具有重要的价值。

Microscopic structure of rough rice after sun drying

The microscopic structure of rice kernel is studied after sun drying in order to research the initiation and propagation theory of stress cracks of rough rice. The microscopic structure of rice kernel is observed by Scanning Electronic Microscope. The structure of the endosperm tissue of rice kernel is damaged slightly after sun drying, and stress cracks are produced. The stress cracks are also produced between the seed capsule and the endosperm tissue. The stress cracks are generated in the center of endosperm tissue first, then propagated. When stress cracks are produced, both sides of the endosperm tissue are damaged. Others are not damaged. Most stress cracks are propagated along the edge of the starch granule, and through the cell wall. The morphosis of endosperm tissue and microscopic structure of stress cracks of rice kernel are analysed. It is important through the stress cracks of rough rice to improve the observation technology. It is significant in order to estimate the quality of rice after drying.