中国水稻科学2016，Vol.30Issue(2)：193-199,7.DOI:10.16819/j.1001-7216.2016.5039
氮肥对粳稻籽粒腹白和心白发生及生化组成的影响
Effects of Nitrogen Fertilizer Application on the Formation of White-belly and White-core as Well as Biochemical Composition of japonica Rice Grains
摘要
Abstract
The white-belly and white-core mutants (WBRK and WCRK)from Wuyujing 3 were used to clarify the effects of nitrogen application levels (zero nitrogen application,CK;the ratio of basal N fertilizer to topdressing N fertr-lizer for panicle initiation 1:1,N5-5;N fertilizer as basal fertilizer N10-0)on the occurrence of white-belly and white-core grains as well as grain chemical components.The results showed that Nitrogen application significantly increased the percentages of white-belly and white-core grains and the latter was more susceptible to nitrogen application.Aver-aged across nitrogen treatments,WBRK produced grains with similar chemical composition in comparison with those of control.By contrast,WCRK had higher total starch,amylose and amylopectin contents.Also,nitrogen application im-proved rice milling quality.Compared to CK,rice grains from WBRK showed significantly elevated contents of storage proteins except for albumin as nitrogen topdressing rate increased,while rice grains from WCRK contained significantly higher levels of protein with no significant changes in protein compositions.Nitrogen topdressing increased the contents of the majority of the 17 amino acids,but decreased histidine and arginine contents especially for WCRK.These find-ings suggested that nitrogen application exerted a significantly different influence on the occurrence of white-belly and white-core kernels and the accumulation of starch and protein during grain filling,indicating the necessity of various formulated strategies to eliminate white-belly and white-core grains.关键词
水稻/氮肥/腹白籽粒/心白籽粒Key words
rice (Oryza sativa L.)/nitrogen fertilizer/white-belly rice grain/white-core rice grain分类
农业科技引用本文复制引用
习敏,林赵淼,赵艳岭,张新城,杨小雨,刘正辉,李刚华,王绍华,丁艳锋..氮肥对粳稻籽粒腹白和心白发生及生化组成的影响[J].中国水稻科学,2016,30(2):193-199,7.基金项目
国家自然科学基金资助项目(31171485,31470086) （31171485,31470086）
国家科技支撑计划资助项目(2012BAD04B08) （2012BAD04B08）
国家 863 计划资助项目(2014AA10A605). （2014AA10A605）
