Abstract. Fadhilla S, Hakim L, Agustian A, Lubis YS, Siregar AW. 2022. The diversity of utilizations, tapping flow discharge, and conservation of sugar palm (Arenga longipes Mogea) cultivated in Langkat, North Sumatra, Indonesia. Biodiversitas 23: 122-132. Sugar palm (Arenga longipes Mogea) is one of the Non-Timber Forest Products (NTFPs) cultivated by the forest community in the village of Sei Limbat, Selesai Sub-district, Langkat District, North Sumatra. It is a plant with several benefits for economic development and a source of livelihood. Therefore, this research aims to determine the morphology of sugar palms through the identification of the species developed by the community, potential use, economic value, and tapping productivity. The morphological identification was used to determine the species of sugar palm developed by the community. The multiple utilization and economic values were identified and analyzed using the result of in-depth interviews through questionnaires. In this study, it was found that the diversity of uses of the palm plant included the utilization of palm sugar (consisting of large palm sugar, small palm sugar, liquid sugar and powdered sugar), utilization of black palm fiber, and conservation purposes. Based on the morphological identification, the species of sugar palm cultivated by the forest community was Arenga longipes Mogea. Furthermore, the tapping productivity was influenced by the panicle circumference, tree height, and flower height from the ground. The tapping productivity was calculated using daily production, which was correlated with sugar palm tree morphology. Based on the result, it can be concluded that the species identified is A. longipes which has a variety of uses and the tapping productivity was influenced by plant morphology.

Kerusakan hutan mangrove di Desa Silo Baru menyebabkan terganggunya fungsi mangrove baik secara fisik, biologis, dan ekonomi. Upaya rehabilitasi dilakukan sebagai sebuah langkah perbaikan agar fungsi-fungsi tersebut dapat kembali berjalan sebagaimana mestinya. Selain itu, kegiatan rehabilitasi bisa memicu perubahan atau penambahan komposisi dan keanekaragaman jenis di suatu wilayah. Penelitian ini bertujuan untuk mengetahui komposisi dan keanekaragaman jenis vegetasi mangrove hasil rehabilitasi di Desa Silo Baru, Sumatera Utara. Pengambilan data dilakukan pada 4 lokasi rehabilitasi mangrove menggunakan metode transect line plot dengan jarak antar petak ukur adalah 55 m. Setiap petak ukur dilakukan pengamatan vegetasi dengan metode nested sampling menggunakan petak ukur 10x10 m untuk pohon, 5x5 m untuk pancang, dan 2x2 m untuk semai. Analisis dilakukan dengan menggunakan INP dan indeks diversitas Shannon. Hasil menunjukkan bahwa ditemukan 12 jenis vegetasi mangrove yang terdiri dari 10 mangrove mayor dan 2 mangrove minor. Jenis mangrove yang mendominasi pada setiap lokasi rehabilitasi berbeda-beda dan keanekaragaman jenis mangrove hasil rehabilitasi di Desa Silo Baru tergolong kriteria keanekaragaman rendah hingga sedang.

Each land in a watershed area has different capabilities depending on the characteristics of the land in the area. Land capability analysis is needed in land management and land use, the aim is that land use can be carried out optimally and reduce the impact of land damage. Determination of land capability class using the matching method, by matching and comparing land characteristics or land limiting factors with land capability class criteria according to the USDA classification system. This study was started by conducting field observations and taking soil samples, then analyzed using Land Capability and Landuse Planing (LCLP) software and GIS to get a map of the land capability class. The results showed that the land capability in site are consists of class II-IV and VI-VII. The limiting factors for land management are erosion (e), permeability (P), texture (t) and slope (L)