广西东兰墨米品质研究

Quality Study of Donglan Black Rice in Guangxi

摘要: 东兰墨米因其独特营养价值与稀缺性，市场溢价显著，已成为东兰县乡村振兴的核心产业。本文依据NY/T 832-2022《黑米》标准对东兰墨米开展全项指标的检验，再适当增加蛋白质和脂肪等营养品质项目的测定，对东兰墨米的整个黑米率、直链淀粉含量、不完善粒含量、矢车菊素-3-O-葡萄糖苷含量、蛋白质、脂肪、水分等7项品质指标进行相关性研究，结果表明这7个指标存在不同程度的相关性，东兰墨米的整黑米率偏低、矢车菊素-3-O-葡萄糖苷含量中等、不完善粒极少、直链淀粉含量游离于现行分类阈值之外，这些品质特征与现行标准存在系统性错位，提出亟需构建兼顾通用性与地域特性的分级评价体系，才能凸显东兰墨米独特价值与地域标识性。

Abstract: Donglan black rice, renowned for its unique nutritional value and scarcity, commands a significant market premium and has become a cornerstone industry in Donglan County’s rural revitalization efforts. This study evaluates Donglan black rice across all key indicators in accordance with the NY/T 832-2022 “Black Rice” standard, supplemented with measurements of nutritional quality parameters such as protein and fat content. A correlation analysis was conducted on seven quality indicators: whole black rice rate, amylose content, imperfect grain content, steatogenin-3-O-glucoside content, protein, fat, and moisture. The results reveal varying degrees of correlation among these indicators. Notably, Donglan black rice exhibits a low whole black rice rate, moderate steatogenin-3-O-glucoside content, minimal imperfect grains, and amylose content exceeding current classification thresholds—a systemic discrepancy from existing standards. This underscores the urgent need for a grading evaluation system that balances universal applicability with regional characteristics to fully highlight the distinctive value and regional identity of Donglan black rice.