Keywords Sweet potato;weak light stress;tuberous root yield;tuberous root quality;starch;anthocyanin;physiological activity;tuberous root enlargement;endogenous hormone;starch synthase;

• 甘薯;弱光胁迫;地膜覆盖;块根产量;块根品质;淀粉;花青素;生理活性;块根膨大;内源激素;淀粉合成酶;