Using two winter wheat cultivars, YannonglSand Lumai22, the study tried to explore the regulating mechanism of root cutting, the relationship between accumulation of root fresh weight and distributing, especial root activity in soil layer and growth of aerial parts, the regulation of hormones concentration in roots, leaves and grains on growth of aerial parts and grain growth, and the influence of root cutting and fertilizer (nitrogen and manure) application interaction on yield and quality. The ...