以香稻品种Basmati、湘晚籼13号、中香1号和非香稻常规品种黄华占为试验材料,以永顺县、江永县、长沙市为3个试验点,用GC-MS交替移动窗口因子分析法(AMWFA)定性定量分析水稻香气质量,并比较分析了这3个产区地形地貌差异性及其气候生态因子的差异性,讨论了主要香稻产区气候生态因子与水稻香气质量的相关性。研究结果表明,在香稻灌浆初期和灌浆中期日均气温最低、日最高气温最低、日最低气温最低,而气温日较差最大的传统地方香稻产区的香稻香味最浓,香味物质种类最多;日均气温低和气温日较差/昼夜温差大有利于提高稻米游离氨基酸和不饱和脂肪酸的种类及含量,这也是导致江永香稻和永顺香稻比长沙地区香稻香味更浓、米粒更油光发亮的原因之一。
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