Biomass potential on several mangrove planting models in Java Island, Indonesia

Silvofishery is a technology that refers to the principle of sustainable ecology, because the rehabilitation of the coastal ecosystems does not interfere the ongoing fishery cultivation practices. The aim of this research is to get the total prediction of biomass at Pemalang site, Banten site, and Banyuwangi site on the green belt model and silvofishery model. The method used for vegetation analysis is the method of path and line plot and census method, while the allometric formula was taken from various existing literature. The results showed that the green belt model both natural and plantation has a higher biomass than the sylvofishery model. The largest green belt model biomass in the form of natural forest model was recorded in Banten with a total of 182.30 t ha-1, followed by forest plantation biomass at Banyuwangi tallying 169.99 t ha-1, and forest plantation in Pemalang of 123.90 t ha-1. The largest silvofishery model biomass is the Banten site with an amount of 155.03 t ha-1, the "komplangan" model (mangrove plants adjacent to ponds) at Banyuwangi recording 121.05 t ha-1, the "kao-kao" plantation model (mangrove plants line up in ponds) at Banten 30.00 t ha-1, the natural kao-kao at Banten 12.51 t ha-1, komplangan at Pemalang 10.73 t ha-1, and the lastly the lowest biomass recorded was found in an open ditch model tallying 2.13 t ha-1 in Pemalang Site. Thus the optimal sylvofishey model of ecological and economic aspects is the kao-kao model and the komplangan model.