关键词: 矿质元素, 品种, 地区, 主成分分析

Abstract: Mineral nutrients are essential components of body construction and life support. In order to investigate the differences in mineral element contents of foxtail millet cultivars, this paper tested the contents of 11 mineral elements including P, K, Ca, Mg, Na, Cr, Cu, I, Mn, Zn and Se from 8 foxtail millet cultivars at 3 locations, and conducted comprehensive evaluation on their mineral element contents. The results showed that there were differences in variability of different mineral element contents in millet. The variable coefficient of Na, I, Cr and Se content were bigger(>5%). Except K and Se, there were remarkable differences in the other 9 mineral element contents affected by cultivar. Except Cu, there were significant differences in the other 10 mineral element contents affected by location. Principal analysis were applied for ranking and evaluating locations and cultivars. Ranks by cultivars were Jigu18>Jigu31>Jigu38>Jigu39>Yugu19>Jigu19>12H402>Yugu18. Ranks by locations were Gaocheng >Jingxing >Boshan. These results were of great significance for confirming the mineral nutrition value of millet, and also had better practical value for understanding the differences of mineral nutrients in different cultivars and at different locations.

Key words: mineral element, cultivar, region, principle component analysis (PCA)