关键词: 春薯, 垄作方式, 生长动态, 干物质积累, 机械化生产

Abstract: In the present study， the influence of different ridge modes including single ridge (SR)， wide ridge for double rows (WR) and wide ridge gashed for double rows (WRG) on the growth and dry matteraccumulation of sweet potato were compared， to provide references for the mechanized production. It was shown that shoot growth under SR and WR were unimodal and bimodal， respectively， while the growth under WRG was steady. The growth and dry matter accumulation of root tuber of sweet potato cv. Xushu22 showed a synchronous effect with the shoot growth. The changes of T/R value were reasonable， and there was no significant difference of yields among the 3 ridge sowing ways. For cv. Zheshu20， the growth and dry matter accumulation of root tuber exhibited a lageffect on shoot growth. Under SR， the earlier growth peak of shoot provided basis for the later growth and dry matter accumulation in root tuber， and thus was beneficial for the high yield production. However， the earlier growth deficiency under WR and WRG hindered the successive growth and dry matter accumulation in root tuber， and consequently was adverse for the high yield production. It was concluded that cv. Xushu22 could be cultivated by SR， WR and WRG， while SR is the best way for mechanized production of cv. Zheshu20. But, if cv. Zheshu20 was cultivated as spring edible variety for early harvest， WR would be the best choice．

Key words: spring sweet potato, ridge modes, growth dynamic, dry matter accumulation, mechanized production