Diversity of Soil Insects in Cananga (Cananga odorata(Lam.) Hook. f. & Thomson) Stands with Fertilization Treatment

Kenanga (Cananga odorata (Lam.) Hook.f. & Thomson) atau ylang- ylang dari famili Anonaceae merupakan salah satu tanaman kehutanan. Tujuan dari penelitian ini untuk mengetahui keanekaragaman dan kelimpahan serangga permukaan tanah di tegakan Kenanga (Cananga odorata (Lam.) Hook.f. & Thomson) yang diberi perlakuan pemupukan. Prosedur penelitian mencakup tahapan penentuan lokasi pengamatan, pengambilan sampel menggunakan metode pitfall trap, pengukuran faktor lingkungan, identifikasi serangga dan analisis data. Jumlah total fauna tanah pada perlakuan sebelum dipupuk ditemukan sebanyak 14 ordo dan 1421 individu sedangkan untuk perlakuan sesudah dipupuk ditemukan sebanyak 16 ordo dan 2108 individu. Setiap plot terjadi penambahan jumlah individu ketika sudah diberi perlakuan pupuk kecuali pada perlakuan pupuk. Faktor bertambahnya individu serangga tidak hanya dari pemberian pupuk namun dari faktor mikrohabitat, yaitu banyaknya serasah, tumbuhan bawah, suhu dan kelembaban. Morfospesies yang mengalami penambahan jumlah individu paling signifikan yaitu formicidae. Indeks keanekaragaman spesies semut yang relatif tinggi ditemukan pada plot kontrol. Kata kunci: Cananga odorata, keanekaragaman hayati, pupuk, seranggaYlang-ylang (Cananga odorata (Lam.) Hook. f. & Thomson) or ylang- ylang from the Annonaceae family is one of the forests. This study aimed to determine the diversity and abundance of soil surface insects in Kenanga (Cananga odorata (Lam.) Hook. f. & Thomson) stands that were treated with fertilization. The research procedure includes determining the location of observations, taking samples using the pitfall trap method, measuring environmental factors, identifying insects, and analyzing data. The total number of soil fauna in the pre-fertilized treatment was found to be 14 orders and 1421 individuals, while for the post-fertilized treatment was found to be 16 orders and 2108 individuals. In each plot, there was an increase in the number of individuals who it was given fertilizer treatment except for fertilizer treatment. The factor of increasing individual insects is not only from fertilizer application but also from micro-habitat factors, namely the amount of litter, undergrowth, temperature and humidity. The morphospecies that experienced the most significant increase in the number of individuals was Formicidae. A relatively high index of ant species diversity was found in the control plot. Keywords: Cananga odorata, biodiversity, fertilizer, insect