Optimization of nitrogen fertilization improves rice quality by affecting the structure and physicochemical properties of starch at high yield levels

作     者：ZHOU Tian-yang LI Zhi-kang LI En-peng WANG Wei-lu YUAN Li-min ZHANG Hao LIU Li-jun WANG Zhi-qin GU Jun-fei YANG Jian-chang ZHOU Tian-yang;LI Zhi-kang;LI En-peng;WANG Wei-lu;YUAN Li-min;ZHANG Hao;LIU Li-jun;WANG Zhi-qin;GU Jun-fei;YANG Jian-chang

作者机构：Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Agricultural CollegeYangzhou UniversityYangzhou 225009P.R.China Jiangsu Co-Innovation Center for Modern Production Technology of Grain CropsYangzhou UniversityYangzhou 225009P.R.China Joint International Research Laboratory of Agriculture and Agri-Product SafetyMinistry of Education of ChinaYangzhou UniversityYangzhou 225009P.R.China 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2022年第21卷第6期

页      面：1576-1592页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：financially supported by the National Natural Science Foundation of China (32071943 and 31872853) the Priority Academic Program Development of Jiangsu Higher Education Institutions, China (PAPD) 

主　　题：nitrogen fertilization rice starch starch structure physicochemical properties chain length distribution 

摘      要：A major challenge in modern rice production is to achieve the dual goals of high yield and good quality with low environmental *** study was designed to determine whether optimized nitrogen(N)fertilization could fulfill these multiple *** two-year experiments,two high yielding‘super’rice cultivars were grown with different N fertilization management regimes,including zero N input,local farmers’practice(LFP)with heavy N inputs,and optimized N fertilization(ONF).In ONF,by reducing N input,increasing planting density,and optimizing the ratio of urea application at different stages,N use efficiency and the physicochemical and textural properties of milled rice were improved at higher yield *** with LFP,yield and partial factor productivity of applied N(PFP)under ONF were increased(on average)by 1.70 and 13.06%,*** increased starch and amylose content,and significantly decreased protein *** contents of the short chains of A chain(degree of polymerization(DP)6-12)and B1 chain(DP 13-25)of amylopectin were significantly increased under ONF,which resulted in a decrease in the stability of rice starch *** increased viscosity values and improved the thermodynamic properties of starch,which resulted in better eating and cooking quality of the ***,ONF could substantially compensate the negative effects caused by N fertilizer and achieve the multiple goals of higher grain quality and nitrogen use efficiency(NUE)at high yield *** results will be useful for applications of high quality rice production at high yield levels.