Kemelimpahan dan Karakterisasi Bakteri Rizosfer Tanaman Kelapa Sawit di PT Bumitama Gunajaya Agro Kalimantan Tengah

Ridho Asmara; Radix Suharjo; Maria Rini; Suskandini Ratih Dirmawati

doi:10.23960/jtur.vol3no2.2021.121

Ridho Asmara Universitas Lampung
Radix Suharjo Department of Agrotechnology, Faculty of Agriculture, University of Lampung
Maria Rini Department of Agrotechnology, Faculty of Agriculture, University of Lampung
Suskandini Ratih Dirmawati Department of Agrotechnology, Faculty of Agriculture, University of Lampung

DOI: https://doi.org/10.23960/jtur.vol3no2.2021.121

Keywords: isolates of bacteria, rhizospher, palm oil (Elaeis guineensis Jacq.)

Abstract

. The palm oil (Elaeis guineensis Jacq.) is the one of main plantation crops industry in Indonesia. The production of palm oil in Indonesia still be optimized, however there is numerous obstacles , which is Ganoderma Boninensea fungus that caused of stem rotten disease. The ability of G. boninense to infected palm oil plant was greatly influenced by abundance and diversity of bacteria that found in the rhizospher area. This research aims to know abundace and characterization of bacteria in rhizospher palm oil in several locations in PT Bumitama Agro Gunajaya , Central of Kalimanan. The observation was done by counting the number of populations of bacteria and by distinguished on the basis of form and colors. The oxidative fermentative gram (O/F) test, softrot test, hypo virulent test and hypersensitive were as additional test. The results of the study showed that many of 161 bacteria isolates obtained by the number of different bacterial populations. The highest population numbers obtained in the territory with a PAGE ultisol soil type was 15998.4 X 10⁴CFU/g soil and the lowest population numbers in the territory PAGE with histosol soil type was 7332.6 X 10⁴ CFU/g soil. The form of the bacterial colony morphology obtained was rounded and irregular colonies with the color red, white, pink, yellow and white turbid. Most of bacteria were 58.8% Gram-positive, 82% fermentative, 63.4% reacted overwhelmingly negative in hypersensitive test, 80.1% negative in softrot and 91.2% was hypovirulen.

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