Application of Various Species of Fungi on Avicennia Marina Growth that is 200 m Away from the Coastline in Belawan and Sembilan Island

Mangrove forest has many benefits, including helping to reduce the effects of storm surges, big waves, and winds. Mangrove forests will be disrupted if they are near industrial areas, this can result in a negative impact in the form of industrial waste either solid or liquid waste that can affect to surrounding environment. The purpose of this study was to determine the types of fungi that are expected to increase the growth of mangrove seedlings A. marina. This study uses several types of fungi, namely, the type of fungi Aspergillus niger, Aspergillus sp. 2, Aspergillus sp. 1 and control. While the experimental design used in this research method was a Completely Randomized Design (CRD) with A. marina which was carried out at both river mouths for each location consisting of 2 plots (polybags and soil). The results showed that fungi had different abilities in increasing the growth rate of A. marina seeds which significantly affected the parameters of diameter, leaf width and total dry weight of plants. From the results of this study, it can be concluded that the Aspergillus niger fungi provides the best benefits for mangrove growth.