不同品种小麦粉品质特性对馒头品质的影响

以14种河套小麦粉作为研究对象,采用主成分和聚类统计分析小麦粉粉质指标、拉伸指标、吹泡指标对馒头品质的影响。结果表明:湿面筋、蛋白质与馒头弹性、回复性呈显著正相关,相关系数分别为0.822,0.791,0.643,0.752;吹泡指标P值、W值与馒头比容呈极显著正相关(相关系数为0.768和0.709)。前5个主成分方差贡献率分别为41.7%,17.3%,14.2%,13.5%,11.2%且累计贡献率达97.9%,可以较好地反映小麦粉品质的综合信息。聚类分析表明第4类小麦粉的形成时间、稳定时间、最大拉伸阻力、最大拉伸比、L值、G值、W值较小,弱化度较大,而馒头硬度最大。

Effects of different wheat flour quality characteristics on steamed bread quality

With fourteen kinds of Hetao wheat flour as the research object, the effects of wheat flour quality indexes, stretching indexes and alveograph indexs on steamed bread quality indexes were analyzed by principal component analysis and clustering analysis. The results showed that wet gluten and protein were positively correlated with the elasticity and resilience of steamed bread, and the correlation coefficients were 0.822, 0.791, 0.643 and 0.752, respectively. The alveograph index P value, W value and Ie value were significantly positively correlated with the specific volume of steamed bread (the correlation coefficient was 0.768 and 0.709). The contribution rate of variance of the first five principal components was 41.7%, 17.3%, 14.2%, 13.5% and 11.2% respectively, and the cumulative contribution rate was 97.9%, which can better reflect the comprehensive information of wheat flour quality. Cluster analysis showed that the formation time, stability time, maximum tensile resistance, maximum tensile ratio, L value, G value and W value of the fourth type of wheat flour were smaller, and the degree of weakening was larger, while the hardness of steamed bread was the largest.