Pertumbuhan Bibit Rhizophora apiculata yang Diberi Berbagai Jenis Pupuk Kandang di Dusun IV, Pulau Sembilan, Pangkalan Susu, Sumatera Utara

Abstract

Mangrove ecosystems are very vulnerable to anthropogenic activities carried out by the community, such as firewood collection, land conversion for ponds, settlements, highways, ports, livestock and agriculture. Fertilization activities are carried out to increase plant growth and productivity. Fertilization of mangroves must take into account the dynamics of sea tides to ensure the effectiveness of fertilization and reduce the risk of fertilizer being carried away by the current. The purpose of this study was to determine whether there was an effect on the growth of mangrove seedlings (R. apiculata) treated with quail manure, chicken manure, cow manure, goat manure or no fertilizer. The study was conducted from October 2023 to January 2024. Observations and data collection were conducted every two weeks for three months. The variables observed were the increase in seedling height, seedling diameter, number of leaves, seedling dry weight, seedling wet weight, leaf area, and growth rate. The results showed that the treatment that had the most influence on the growth of height, diameter, wet weight, dry weight of R. apiculata seedlings was the provision of P2 (chicken manure 100 g/seedling). The treatment that had the most influence on the growth of the number of leaves of R. apiculata was P0 (control/no fertilizer given). The treatment that had the most influence on the growth of R. apiculata leaf area was P4 (goat manure 200 g/seedling). The greatest growth rate in height and diameter was found in the provision of P2 (chicken manure 100 g/seedling).