大麦灌浆期干旱胁迫对麦芽主要品质性状的影响  

Influence of drought stress during the grain-filling stage on malt main quality traits of barley

作　　者：洪叶 张国平[1] HONG Ye;ZHANG Guoping(College of Agriculture and Biotechnology,Zhejiang University,Hangzhou 310058,China;Yangzhou Agricultural Technology Comprehensive Service Center,Yangzhou 225001,Jiangsu,China)

机构地区：[1]浙江大学农业与生物技术学院,杭州310058 [2]扬州市农业技术综合服务中心,江苏扬州225001

出　　处：《浙江大学学报（农业与生命科学版）》2022年第2期135-140,共6页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家自然科学基金(31620103912)。

摘　　要：以麦芽品质和耐旱性差异很大,而抽穗与成熟时间基本相同的栽培品种浙大9号和西藏野生大麦XZ166为供试材料,研究在灌浆期不同时间干旱胁迫处理对2个基因型大麦麦芽主要品质性状的影响。结果表明:干旱胁迫增加了麦芽蛋白质含量、库尔巴哈值和α-氨基氮含量,降低了麦芽浸出率和麦芽汁黏度,且浙大9号的变化幅度大于XZ166;灌浆前期(开花后7 d)干旱胁迫对浙大9号的影响显著大于XZ166,而灌浆中期(开花后14 d)干旱胁迫对XZ166影响更明显。因此,灌浆期不同时间干旱胁迫对麦芽品质有显著影响,在啤酒大麦品质育种和优质生产上应该特别关注。在实际生产中应根据当地干旱发生的历程,选用适宜的大麦品种,尽量使其品质形成的关键时期避开逆境胁迫。This experiment was carried out to investigate the effects of drought stress treatments during the grain-filling stage on the malt main qualities of the two barley genotypes,Zheda No.9(ZU9)(a cultivar)and XZ166(a wild Tibetan barley accession),which differed greatly in the drought tolerance and malt quality,and had the similar heading and maturing stages.The results showed that drought stress significantly increased the malt protein andα-amino nitrogen contents,and the Kolbach index,and reduced malt extract rate and viscosity,with ZU9 being more largely affected than XZ166.Drought treatment at the early grain-filling stage(7 d after anthesis)caused much larger changes of all the examined malt qualities in ZU9 than in XZ166,while for the drought treatment at the middle grain-filling stage(14 d after anthesis),the changes of these quality traits were much larger in XZ166 than in ZU9.It may be concluded that drought stress occurred during the grain-filling stage had a great impact on malt quality,which should be addressed in breeding and agronomic management of malt.In the actual production,appropriate varieties should be selected according to the occurrence time of the drought,so as to avoid the drought stress during the critical period of quality formation.

关 键 词：干旱胁迫 麦芽品质 蛋白质含量 麦芽浸出率 酶活性 大麦 

分 类 号：S512.3[农业科学—作物学]