Sweetener production in Indonesia decreased due to the unavailability of clones with high yield potential and site-specific. This research aims to assess the influence of nitrogen, phosphorus, and potassium fertilizer (NPK) in plants and the quality of sweet potato in the Indonesian highlands. The research was conducted at Syiah Kuala University Farm, Bener Festive (998 m above sea level), Aceh Province, Indonesia. Experiments It were performed using a completely random block design with factorial patterns. The results showed three factors 15:15:15 NPK doses (200, 300, and 400 kg ha − 1) and seven Sweet potato lines (CIP-LSQ, CIP-287, CIP-GA, CIP-B9, CIP-440137, local Saree landrace, and the Antin I varieties). The highest tuber yield (32.51 t ha − 1), coarse fat, crude fiber, Total glucose, and starch were found at a dose of NPK 400 kg ha − 1. The CIP-GA clone has the highest yield of the tuber (39.86 t ha − 1), which does not differ significantly from the CIP-287 (37.13 t ha − 1), but this clone has a low biomass weight. The CIP-GA clone has The highest moisture content, coarse protein (3.91%), crude fiber (2.67%), and beta-carotene (6.24 mg 100 g − 1) of those tested; However, it is also lower in total glucose and has the lowest starch content.
Key words: beta-carotene, biomass, clone, sweet potato, tuber yield