前报以高产品种金千贯为试材,研究了不同氮钾供给量对块根膨大的影响。提出氮素供给量的多少对块根膨大是最重要的;在氮素供给量多时,多施钾的效果好等见解。但是,对品种间对养分供给量生育反应的差异没有报告。关于块根膨大特性的品种间差异的报告,除关于直播栽培抑制种薯膨大的报告外很少报道,特别是关于不同养分供给量对块根膨大影响的 In the previous report, high-yielding seeds were used as test materials to study the effects of different amounts of nitrogen and potassium on root swelling. It is proposed that the amount of nitrogen supply is the most important for tuberous root enlargement. When nitrogen supply is large, the effect of more potassium application is better. However, no differences were reported in the reproductive responses to the nutrient supply between breeds. Reports on differences between tuberous enlargement traits have rarely been reported except for the report on direct seeding cultivation to suppress tuberous enlargement. In particular, reports on the effects of different nutrient supply on tuberous root enlargement