Effectiveness of giving NPK fertilizer and chitosan for the growth of Sunan Candlenut plant on marginal land

Abstract

Sunan Candlenut (Reutealis trisperma (Blanco) Airy Shaw) is a type of vegetable oil producing plant that has great potential as a source of raw material for biodiesel. To develop Sunan Candlenut plants on marginal land, it is necessary to achieve innovation in their cultivation, specifically by providing NPK fertilizer and nutrition with plant supplements using chitosan. In an effort to increase the effect of chitosan on plant growth, it is necessary to add gibberellins (GA3). There was no interaction between NPK fertilizer application at various doses and chitosan administration on all vegetative growth parameters of the Sunan Candlenut plants which were observed. The results showed that the dose of NPK fertilizer had the same effect on all parameters. Chitosan plus (chitosan 30 ml/l + GA3) gives a better effect on all parameters observed. Plants treated with chitosan had a higher number of secondary branches and leaf canopy width than those without chitosan.