业已认识到甘薯块根的库容是决定经济产量和干物质产量的一个最重要因子。块根对干物质产量的影响,是通过“源—库关系”表现的。但是,块根库容还不很清楚,而且调节块根库容的生理及生化因子仍属未知。在大田条件下,曾采用块根库容相同品种作接穗的嫁接株或者交互的嫁接株来估测品种块根库客。但是,由于嫁接株顶部的生长因砧木品种而变动,即使采用相同品种作接穗,其 It has been recognized that storage of sweet potato roots is one of the most important determinants of economic output and dry matter production. The effect of root tubers on dry matter production is demonstrated by the “source-sink relationship.” However, the tuberous volume is still not clear, and the physiological and biochemical factors that regulate tuberous volume remain unknown. Under field conditions, rootstocks and rootstocks were used to assess the varieties of rootstocks by using grafted rootstocks with the same root tuber content as the scion or by interacting grafts. However, since the growth of the top of the grafted plants varies with rootstock varieties, even if the same variety is used as the scion,