Komposisi Komunitas Cacing Tanah pada Areal Kebun Kelapa Sawit PTPN III Sei Mangkei yang Diberi Pupuk Limbah Cair Pabrik Kelapa Sawit di Kabupaten Simalungun Sumatera Utara

Abstract

Research on the Composition of Earthworm Communities in Palm Plantation Area PTPN III Sei Mangkei The Fed Fertilizer Palm Oil Mill Waste in County Simalungun conducted in September to October 2010. Method of determining sample points is done by purpossive Random Sampling and sampling methods and Hand sorting Square with plot size 30 x 30 cm x 20 cm with 15 plots at each study site. Location I garden area which is not fed palm oil mill effluent (control), Location II (Area of oil palm plantations have begun to dry (moist), Location III (Area of oil palm plantation with waste water conditions are still wet). From the results of research found in 4 species of earthworms include Pontoscolex corethrurus, Megascolex sp1 and Pheretima Posthuma, and Fridericia sp contained in all three study sites, and Fridericia sp species found only in locations III. Earthworm population densities are highest are Megascolex sp1). 22.96 individu/m2 density value and 55.37% Relative Density obtained at location III, while the frequency of presence of 73.33% which is obtained at location II. Pontoscolex corethrurus, Megascolex sp1 and Pheretima Posthuma including indicator species with KR values ≥ 10% and FK ≥ 25%, which means the animals can live well.