Abstract :
Peanuts (Arachis hypogeae L.) is one of the legume plants of considerable economic value and one of the sources of protein for the body. The fluctuating production of peanuts is influenced by several things, including the narrowing area of agricultural land, attacks by pests and diseases, and inefficient land management. One effort that can be done to increase peanut production is the addition of dragon fruit liquid complementary fertilizer and cocopeat mulch. With the treatment of dragon fruit liquid complementary fertilizer and cocopeat mulch, it is expected that there will be an interaction between the two treatments, namely the application of dragon fruit liquid supplementary fertilizer used as a nutrient enhancer in peanut plants while cocopeat is used as mulch where it can be seen that cocopeat has a fairly good water retention capacity. So that when the dragon fruit liquid supplementary fertilizer is applied to the cocopeat peanut plant it can hold the liquid supplementary fertilizer so that the plant can absorb it optimally.This research was conducted in the land of Jember State Polytechnic, Sumbersari District, Jember Regency, East Java Province. This study used a factorial Randomized Blok Design (RBD) design with 2 factors 9 treatment 3 replays. The concentration factor of dragon fruit ppc 15%, 30%, 45%, mulch factor cocopeat control, 2 cm, 4 cm. Data Analysis using ANOVA and advanced tested using DMRT level 5%. The results showed that ppc dragon fruit and mulch cocopeat exerted a noticeable different influence on, the weight of wet pods, the weight of dry pods, the weight of wet seeds. But the effect is not noticeable on the high observation variables of plants, the weight of the stove.