The effect of planting distance on seeds Rhizophora apiculata from the coast to the northeast on Pulau Sembilan, Pangkalan Susu District, Langkat Regency

Abstract

Coastal areas are the main habitat of mangrove forests. As is well known, this area has both beauty and conflict of interest, so the ecosystem in the area faces various threats and problems of destruction caused by human activities, such as coastal reclamation work, bombing, poisoning of coral reefs and housing construction. This research was conducted to see the differences in the treatment of mangrove nurseries with the type of red mangrove on their growth and development based on the direction of the wind and the distance from the shoreline. The research was carried out from October to December 2020. Determination of the cardinal directions using a compass that points to the northeast, as far as 40 meters from the shoreline. Rhozophora apiculata was planted from a distance of 40 meters to 44 meters at a distance of 1 meter by 1 meter. The results obtained during 12 weeks of observation, showed that the highest seedling height was at a distance of 41 meters, the highest diameter at a distance of 41 meters and the highest number of leaves at a distance of 40 meters. The conclusion is that the most ideal planting distance is at p1 (41 meters spacing).