CAMPURAN MEDIA TANAM DAN ZPTTERHADAP PERTUMBUHAN BIBITKOPI ARABIKA (Coffea arabica L.)VARIETAS ANDUNGSARI 1

Abstract

Mixture of Planting Media and ZPT on the Growth of Arabica Coffee Seedlings (Coffea arabica L.) Andungsari Variety 1. This research aims to determine the effect of the interaction of a mixture of planting media and ZPT on the growth of Arabica coffee seedlings (Coffea arabica L.). This research was carried out in Parik Sabungan Village, Siborongborong District, North Tapanuli, precisely on the campus of Sisingamangaraja XII Tapanuli UNITA University at an altitude of ± 1400m above sea level. This research used a factorial randomized block design (RAK) with two factors, namely: Factor I: a mixture of growing media with four levels of treatment, namely: T0: no treatment, T1: 50% soil media + 50% bitter leaf bokashi, T2: 50% growing media %+bokashi lamtoro leaves 50%, T3: Soil media 50% +bokashi eucalyptus leaves 50%, Factor II: Treatment by administering ZPT geberin which consists of four treatment levels, namely: Z0: no treatment, Z1: ZPT gibberellin (75 ml/ L water)/plot) Z2: ZPT gibberellin (100 ml/L water)/plot):), Z3 : ZPT gibberellin (125 ml/L water)/plot). The parameters observed were plant height (cm), stem diameter (mm), number of leaves (strands), plant root length (cm), plant root wet weight (gr), wet weight of stems and leaves (g), total wet weight of the plant (g), total dry weight of the plant (g). If the treatment shows significant changes, continue with the DMRT follow-up test at the 5%, 1% level and regression test using Excel software. Mixture of growing media (50% soil media + 50% bokashi lamtoro leaves and gibberellin growth regulator 100 ml/L water/plot is the best treatment for Andungsari 1 Arabica coffee.