Effects of the Foliar Application of Potassium Fertilizer on the Grain Protein and Dough Quality of Wheat

Potassium (K) has a significant effect on wheat yield and quality. Owing to the limitations of irrigation production costs, soil-based applications potassium fertilizer are not performed in Loess Plateau China. In late growth stage wheat, deficiency occurs even under sufficient nitrogen/phosphorus (N/P) levels, so it is necessary supplement through foliar spraying. However, there few studies application (KFA) Field experiments were conducted at two experimental sites for 2 years study effects different levels periods The results showed that KFA had no variety Xinong 20 (XN20) but increased Xiaoyan 22 (XY22). improvement wet gluten content stabilization time (ST) XN20 was better than these parameters XY22, while sedimentation value (SV) formation (FT) opposite trend. significantly reduced albumin varieties globulin content. Compared with other stages, form potash spray concentration 60 mmol L−1 (K2) flowering (BBCH 65) protein content, SV grains, whereas 10 days after (AA10, BBCH 71) K2 more beneficial prolonging dough FT. For development time. There genotypic differences composition HMW-GS between varieties. 1, 7 + 8, 4 12 subunits 1 subunit XY22. Partial least squares path modelling (PLS-PM) analysis processing quality indexes (SV, FT, ST) regulated by spraying revealed part affected affecting