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Siagian, Suci Pratiwi Fahrina
Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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DEKOMPOSISI SERASAH DAUN MANGROVE Rhizophora mucronata PADA BEBERAPA TINGKAT SALINITAS DAN KONTRIBUSINYA TERHADAP UNSUR HARA C, N DAN P DI PERAIRAN Siagian, Suci Pratiwi Fahrina; Djayus, Yunasfi; Leidonald, Rusdi
AQUACOASTMARINE Vol 5, No 3 (2017): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Leaf litter has an important role for the mangrove waters fertility. The research was carried out for 90 days and samples were taken for 15 days. The results showed that the leaf litter R. mucronata at salinity levels 0-10 ppt decomposed faster than other salinitylevels. Average weight of residual leaf litterwhich is decomposititated namely the level at 0-10 ppt is 8,89 grams, salinity 11-20 ppt are 10,05 grams and salinity 21-30 ppt is 12,88 gram. Leaf decomposition rate R. mucronata at the level of salinity 0-10 ppt, 11-20 ppt and 21-30 ppt are 8,21, 6,87 and 4,92. While C elements salinity level ppt that is 0-10 ppt, 11-20 ppt and 21-30 ppt are 17,84 %, 17,47 % and 17,03 %. N elements at salinity on the level of 0-10 ppt, 11-20 ppt and 21-30 ppt are 1,39 %, 1,34% 1,30%. And P elements at salinity on the level of 0-10 ppt, 11-20 ppt and 21-30 are 3,77 %, 3,22% dan 3,44%.Keywords :Rhizophora mucronata, the rate of decomposition, mangrove, salinity, litter, nutrient.