Influence of Planting Density on Sweet Potato Storage Root Formation by Regulating Carbohydrate and Lignin Metabolism

An appropriate planting density could realize the maximum yield potential of crops, but mechanism sweet potato storage root formation in response to is still rarely investigated. Four densities, namely D15, D20, D25, and D30, were set for 2-year two-site field experiments investigate carbohydrate lignin metabolism roots its relationship with number, yield, commercial characteristics at harvest period. The results showed that an (D20 treatment) stimulated cambium cell differentiation, which increased accumulation inhibited biosynthesis roots. At canopy closure, D20 treatment produced more roots, particularly developing ones. It by 10.18–19.73% compared control D25 improved features decreasing length/diameter ratio increasing weight uniformity. This study provides a theoretical basis high-value production potato.