受雨害小麦籽粒物性与吹泡特性相关性分析  

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

作　　者：杜晓舟[1] 顾熟琴[1] 卢大新[1] 杨冬[1] 李亮[1] 

机构地区：[1]北京农学院食品科学学院,北京102206

出　　处：《农产品加工（下）》2011年第5期19-22,42,共5页Farm Products Processing

基　　金：国家人事部留学回国人员科技活动择优资助项目(优秀类;2005年)

摘　　要：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 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.

关 键 词：粒径分级 重力分选 吹泡特性 

分 类 号：S512.12[农业科学—作物学]