Differences in morphology and sugar content of purple sweet potato (Ipomoea batatas L.) with potassium treatment at several altitudes

摘要

This research was conducted at three locations in low, medium and high plains. This study was aimed to determine the morphological changes and sugar content of sweet potato caused by potassium dose treatment and climate change. Data was analyzed by factorial randomized block design in time series with two factors. The first factor was Altitude: A_1 (50 meter above sea level (MASL)), A_2 (750 MASL) and A_3 (1450 MASL). The second factor was Potassium: K_0 (0 kg/ha), K_1 (50 kg/ha), K_2 (100 kg/ha) and K_3 (150 kg/ha). The data of plant morphology change and sugar content was descriptively analized, while agronomic and harvest component data analysis by F test and continued with Duncan Multiple Range Test. The results of morphological observations showed different types of plant growth, which in the lowlands and medium plant growth types spread, twisted, more branches, wider leaf area. However, the plateau of plant growth was relatively dwarf, erect, no twist, huddled and short rods and small leaf area. The tuber weight per plant, number of tuber yield and tuber weight per plot in high altitude were significantly higher than lowland and medium. Similarly, increased altitude will be increased the sugar content significantly.