Pengaruh Pemberian Pupuk Kalium terhadap Kualitas Dua Varietas Ubi Jalar (Ipomoea batatas L.)

Indonesia, which is a tropical country, sweet potatoes can be grown on almost all islands in Indonesia. Sweet potatoes come in many varieties. Sweet potato plants are known to be very responsive to potassium. It is hoped that this research obtains information about the correct proportion of potassium fertilizer in each tested variety so that the productivity of the sweet potato plant can be increased. The experiment using the Split Plot Design was repeated three times. The main plot is Varieties (V), such as Gunung Kawi Variety and Cilembu Variety. The sub-plot is the KCl dose (K) which consists of 5 types such as, K0 = 0 kg ha^-1, K1 = 78 kg ha^-1, K2 = 137 kg ha^-1, K3 = 196 kg ha^-1 and K4 = 225 kg ha^-1. The results of the observations were analyzed using the variance test (F test) at the 5% and 1% levels. If there is a significant difference, it will be followed by the HSD test at the 5% level with correlation and regression tests. The results showed that the application of potassium fertilizer affects the quality of the sweet potato plants of both varieties. Giving potassium 225 kg ha^-1 was able to increase fiber content by 35% but had an impact on reducing chlorophyll content by 14%.