The Influence of Gum Inducer Solution Administration on the Gum Production of the Jaranan Plant (Lannea coromandelica (Houtt.) Merr.)

Abstract

Jaranan plant (Lannea coromandelica) grows massively in the buffer zone and utilization zone of Baluran National Park. This plant produces gum in branches and stems. Local people extract gum by cutting down stems as medicine for diarrhea, typhus, and eye infections treatment. The study aims to test gum extraction techniques without cutting down stems that do not cause serious damage to the plants. The research was conducted in March-June 2020 in Sidomulyo, Sumberwaru Village, Banyuputih Situbondo. The research method is carried out by drilling rods combined with the administration of ethephon as a Gum Inducer Solution (GIS). The design of the study is factorial (2x2) with GIS concentration and rod circumference factors. The plant sample used a population sample of 62 trees. The gum retrieval technique is done by drilling rods, then on each borehole inserted 3ml GIS. Gum collection is done every 7 days for 3 weeks. Data analysis uses Two Way ANOVA and GLM-Repeated Measures (SPSS 17). The results showed no effect on the size of the trunk circumference on gum production (p = 0.974 > 0.05) while GIS concentrations of 1.5% produced an average total gum of 33.2 gr/tree, which differed significantly (p = 0.002 < 0.05) with a GIS concentration of 1% (21.24 gr/tree). There is no interaction between the size of the bar circumference and the GIS (p = 0.133 > 0.05). This study concludes that gum production is not influenced by the size of the circumference of the rod but is influenced by gis concentration.