OBSERVATION SERIES OF FLOWERING AND FRUITING PHENOLOGY OF Mischocarpus pentapetalus (Roxb.) Radlk. (SAPINDACEAE) IN CIBODAS BOTANIC GARDENS, 2014-2018

Abstract

Mischocarpus pentapetalus (Roxb.) Radlk. is a potential plant to be developed as a fruit tree and timber. A comprehensive observation of the reproductive stage of this species is still limited. In order to achieve a continuous and sequenced observation, a phenological study was conducted in Cibodas Botanic Gardens (CBG). This study aimed to observe the flowering and fruiting phase phenology of M. pentapetalus and analyze the microclimate’s effect related to the cycle. The observation conducted to three specimens of M. pentapetalus which were planted in January 1979 (Specimen I), January 1985 (Specimen II) and January 1987 (Specimen III), at CBG. The study used descriptive quantitative analysis based on the exploratoryinventory observation of flowering and fruiting phase data of Specimen I, and the microclimate conditions, both are assessed from 2014 to 2018. Specimen II and III were only observed for their phenology in 2019. The results showed that the microclimates condition of CBG for five years was relatively less diverse, except for precipitation (σ ≈ 1.367). This results suspected influenced the reproductive stages that dominantly occurred in the early and at the end of the year. In these periods occurred an increase in rainfall that emerges the flowers and nextdevelopment into the fruiting phase. Seeds harvesting and (re)stock suggested can be conducted on these periods in order to achieve maximum results.