"Dekomposisi Serasah Daun Mangrove Rhizophora apiculata di Desa Bagan Asahan Kecamatan Tanjungbalai Kabupaten Asahan Provinsi Sumatera Utara"

Abstract

Mangroves produce litter that will undergo a decomposition process which is then used as a source of nutrients for plants and is also a source of food for fish and important invertebrates. The purpose of this study was to measure the decomposition of Rhizophora apiculata leaf litter and to know the nutrient content carbon (C), nitrogen (N) and phosphorus (P) in leaf litter R. apiculata released during the decomposition process. The study was conducted from February to May 2017 in Bagan Asahan Village, Tanjungbalai Sub-District, Asahan Regency, North Sumatra Province. The determination of research station using purposive sampling method at three stations with station determination based on observation of availability of R. apiculata mangrove species. The results showed that leaf decomposition rate of R. apiculata leaf on the 90th day at station I was worth 13,04 station II was 11,42 and station III was 10,24. The content of carbon nutrients during the 90-day decomposition process is station I of 16.24%, station II of 15.29% and station III of 15.42%. Nitrogen nutrient elements decomposed on the 90th day were station I of 2.69%, station II of 2.57% and station III of 2.75%. Phosphorus nutrient content during 90 days decomposition process is station I 0,02%, station II 0,02% and station III 0,01%