Application of seedball materials compositions on swamp jelutung (Dyera polyphylla (miq) Stennis) growth for peatland rehabilitation

The Indonesia peatland area is 22.4 million ha. Peatlands are susceptible to degradation when the hydrological conditions are disturbed, thus requiring land rehabilitation by selecting peatlands adaptive species. Swamp jelutung (Dyera polyphylla) is an adaptive plant species that grows in wetlands, it has breathing roots (pneumatophore) and grows in acidic soils. The first objective to explore and analyze of peatland rehabilitation literatures related to the native species and the second objective to analyze the composition of seedball materials effect on swamp jelutung germination. This literature review with bibliometric analysis using PublishOrPerish8 and Vos Viewer 1.6.20 versions. The seedball composition doses for peat soil: dolomite: clay: cocopeat: tapioca are sequentially 8:2:4:1:6, 8:2:2:1:8, 8:2:1:1:8, and 4:1:2:0:0. Vos viewer analysis presented 77 terms commonly used in the papers and linked with 6 clusters. There were 24 papers in 2024, but the research about seedball and jelutung species could not be found. The treatment of seedball material 4:1:2:0:0 has the best germination percentage (87.50%). The ANOVA results showed that there was significant effect of the seedball material composition on the parameters of germination percentage and seedling height, except the parameter mean germination time.