基本苗和施氮量对稻茬迟播小麦品质的影响OA北大核心CSTPCD

The effects of basic seedling and nitrogen application on the quality of strong gluten wheat Nongmai 88 and weak gluten wheat Ningmai 13 were investigated under late sowing conditions,and the appropriate combination of high-quality cultivation measures was selected for Jiangsu Huainan.The results indicated that basic seedling,nitrogen applica-tion,and their interaction exerted significant or extremely significant influences on the main quality indices of late sowing wheat.With the increase of the number of basic seedlings,the water absorption,dry and wet gluten content,breakdown value,dough stability time,and formation time declined,the amylopectin content,trough viscosity,and final viscosity rose,and the amylose content initially increased and then decreased.The alterations of grain hardness,protein content,gluten index,total starch content,peak viscosity,and setback value for the two varieties were inconsistent.With the in-crease of nitrogen application,the grain bulk weight,gluten index,total starch,and amylopectin contents of the two va-rieties decreased,the flour water absorption,dough stability time,and formation time increased,and the protein content and dry and wet gluten content initially rose and then declined.The responses of grain bulk density,amylose content,and flour gelatinization characteristics differed between the two varieties.The protein content,wet gluten content,and dough stability time of Ningmai 13 and Nongmai 88 were all superior under the treatment combination of 3.75 million seedlings·hm-2 and a nitrogen application rate of 315 kg·hm-2 and 3 million seedlings·hm-2 and a nitrogen application rate of 270 kg·hm-2,respectively,in accordance with the national classification standards for weak and strong gluten wheat varieties.