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Abstrak :
Mangrove plays an essential role in ecosystem processes through its goods and services. About 637,624.31 ha of mangrove in Indonesia are in critical condition and need to be rehabilitated. Rhizophora mucronata becomes a good candidate for seeds supply in rehabilitation programs. R. mucronata nursery had influenced by its medium. Husk and husk charcoal can be added to the medium to increase nutrient as well as medium porosity. It is expected to give the effect of growth and physiology on R. mucronata. This study aims to assess the effect of differences in nursery media and the best nursery media that influence the biomass and chlorophyll content of R. mucronata plants. The research was carried out experimentally with a Completely Randomized Design (CRD) with six levels of nursery media consist of mud, husk and husk charcoal with different concentration as the treatments. Biomass and chlorophyll content are the main parameters, and following with measurement of water content, carbon content, pH, and N, P, CEC content in the media. The data were analyzed using ANOVA with 95% confidence level, then proceed with the HSD test with 5% of an error rate. The result obtained that modification of nursery media with husk and husk charcoal only increased wet biomass of roots. The best nursery media affecting the wet biomass of roots is mud and husk charcoal with ratio 1:1. The husk charcoal can increase soil porosity so that soil easy absorb water. The increasing wet biomass of roots also affected by environmental factors such as water content in the medium. While the pH value obtained in the medium is classified as low but still within the tolerance limit, affecting R. mucronata growth.
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