Evaluasi Tegakan Mangrove Hasil Rehabilitasi dengan Teknik Guludan

Abstract

Guludan technique becomes an alternative for mangrove rehabilitation in the disused fishponds. This technique has been implemented since 2005 on the coast of Jakarta. The wider application of this technique requires several studies in advance to see growth of the mangrove in the already planted guludan. This study aims to measure the growth of mangroves planted by guludan techniques, identify environmental factors that affect their mangrove growth, and analyze their relationship. Measurements were performed on 40 guludan samples which planted by Rhizopora mucronata in 2010 - 2013. Rhizopora mucronata grew well in the guludans, followed by Sonneratia caseolaris that grew naturally. Both were dominated by individuals in sapling phase. Meanwhile, environmental factors affecting mangrove growth were N-total, P, Mg, Ca, Na, clay texture, CEC, soil salinity, soil pH, and water level in the guludan.Keywords: guludan technique, mangrove rehabilitation, Rhizophora mucronata, Sonneratia caseolaris

Growth Performance of Mangrove Seedlings Planted with Guludan Technique at Elang Laut Area, Muara Angke, Jakarta

“…The absence of maintenance in the constructed guludan resulted in stands on the guludan dying due to weed infestation. This is similar to the research conducted by Ashari (2018), where the absence of maintenance on the guludan resulted in stand deaths due to weed infestation, with a weed infestation percentage on the guludan reaching 53,33%.…”

“…Meanwhile, another study by Adliyandra (2019) on R. mucronata using the same Guludan technique showed an average height of 88 cm after one year. Based on these studies, the growth of mangrove seedling height at the research site is lower compared to the research conducted by Ashari (2018) and Adliyandra (2019).…”

“…The increase in diameter after 1,7 years is 0,84 cm/year. When compared to the study by Ashari (2018) regarding the growth of R. mucronata planted using the bunding technique in 2013 in the Angke Kapuk coastal area, which resulted in an average diameter of 2,53 cm after three years, the diameter increase is also 0,84 cm/year. Meanwhile, another study by Adliyandra (2019) on R. mucronata using the same bunding technique resulted in an average diameter of 0,71 cm after one year.…”

“…Maintenance against weed infestation was also carried out at the research site so that mangrove seedlings could grow well. According to Ashari (2018), rehabilitation protocols using guludan techniques require maintenance activities to eradicate growing weeds in guludan areas. This maintenance process is carried out consistently until Rhizophora mucronata is three years old.…”