RATE AND RELEASE OF NUTRIENTS IN DECOMPOSITION PROCESS IN MEDIUM HIGH TIDES AREA, MUARA ANGKE MANGROVE PROTECTED FOREST
The Angke Kapuk Protected Forest is a mangrove area managed by the Provincial Government of DKI Jakarta which functions as a life help system safety to regulate water management, prevent flooding, control erosion, save sea water intrusion, and maintain soil fertility. This study aims to estimate the rate of decomposition of Avicennia marina leaf litter and to analyze the macro nutrient N, P, K, and C-organic content in Avicennia marina leaf litter during the decomposition process. The method used in this study was 200 grams of dried Avicennia marina leaf litter, put in a 40 x 30 cm litter-bag made of nylon with a mesh size of 1 x 1 mm, then the litter bags were placed systematically and spread throughout the sub-plots. The decomposed leaf litter was removed from the mud and then dried to obtain wet weight data. After taking the wet weight data, it is then baked in the oven at 65℃. The dried litter was then weighed as dry weight and analyzed to obtain the results for the levels of macro-nutrients N, P, K and C-organic. The highest rate of decomposition of Avicennia marina leaf litter occurred on the 15th day. The remaining litter on the 15th day was 96.949 g and on the 120th day it was 157.887 g. The increase and decrease in yield from the analysis of N, P, K and C-organic nutrients in Avicennia marina leaf litter was influenced by several environmental factors such as weather, humidity, salinity and other factors.
Medium-High Tides Area, Angke Kapuk Protected Forest, Avicennia marina, Decomposition Rate, Macro Nutrients