受雨害小麦籽粒物性与吹泡特性相关性分析

小麦经粒径分级和重力分选,吹泡特征值发生了变化。由于粒径较大的籽粒较易受到雨害,影响其品质,粒径分级后,其吹泡特征值变化显著,分级效果明显。再经重力分选后,从分选出口I~V试样的容重依次增大,并且随着容重增加,吹泡特征值出现不同趋势,分选效果有明显差异。籽粒容重与弹性(P)和配置比(P/L)呈显著正相关,与延伸性(L)和延伸能力(G)呈显著负相关性,而与烘焙强度(W)和弹性指数(Ie)的相关性不明显。采用密度的线性模型描述吹泡特性可达到很高的拟合精度。

The Relationship between Physicochemical Property and Alveogram Characters of Wheat Deteriorated by Rain before Harvest

The alveogram characters of grains are graded according to grain thickness and grain gravity gives rise to a variety of changes.The large-sized grains are vulnerable to rainfall and their quality will be affected.Its blowing characteristic changes significantly and the grading effect is obvious.And the bulk density of grains from discharge hole 1～5 increase one by one by gravity separation.With the bulk density increasing,there are different trends about blowing characteristic,with a significant difference in separation efficiency.Grain bulk density and toughness(P) and configure(P/L) is significantly positively correlated,but grain bulk density has a negative correlation with the extension properties(L) and the extending capacity(G),with a uncertainty between grain bulk density and the baking strength(W) as well as elasticity coefficient(Ie).A very high fitting precision can be achieved when using a linear model to describe the proportion of blowing features.