Dampak Sedimentasi dan Sifat Tanah terhadap Keberadaan Nematoda Entomopatogendalam Rizosfer Kelapa Sawit di Kabupaten Kutai Kartanegara, Provinsi Kalimantan Timur

Suyadi Suyadi, Andi Suryadi, Rosfiansyah Rosfiansyah, Sofian Sofian

Abstract


Nematoda Entomopatogen (NEP) umumnya hidup bebas di dalam tanah. Tujuan penelitian ini adalah untuk mengetahui pengaruh sedimentasi akibat kegiatan penambangan batubara serta sifat tanah terhadap keberadaan genera NEP pada rhizosfer kelapa sawit di Kabupaten Kutai Kartanegara. Keberadaan NEP yang diamati berdasarkan pengambilan sepuluh kelompok sampel tanah (KST) pada areal 1 yang terdampak sedimentasi sekitar 2 cm, dan areal 2 yang terdampak sedimentasi sekitar 7 cm, dengan susunan KTS sebagai berikut, yaitu 1) KST dari areal 1 dan areal 2 tanpa dampak sedimentasi sebagai kontrol (KST1, KST2, KST3, dan KST4), 2) KST dari areal terdampak sedimentasi dengan kedalaman sekitar 2 cm (KST5, KST6, dan KST7), dan 3) KST dari areal terdampak sedimentasi dengan kedalaman sekitar 7 cm (KST8, KST9, dan KST10). Variabel yang diukur dalam penelitian ini adalah populasi NEP, sifat tanah, dan keberadaan mikroba tanah. Hasil penelitian menunjukkan terjadinya penurunan populasi NEP hinggapada level tidak terdeteksi di bawah lapisan sedimentasi 7 cm. Keberadaan NEP ditemukan pada lapisan sedimen kedua area, pada tanah kedalaman 0-30 cm di bawah lapisan sedimen 2 cm, dan pada tanah kedalaman 0-30 cm di kedua areal control. Ada dua genera NEP yang ditemukan di wilayah studi, yaitu:Steinernema sp. and Heterorhabditis sp.

Keywords


Heterorhabditis;Kelapa sawit;Nematoda entomopatogen;Sediment;Steinernema.

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DOI: http://dx.doi.org/10.35941/jatl.3.2.2021.5243.127-136

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