Karakter Bakteri Azotobacter dan Azospirillum dari Rizosfer Tanaman Lada di Lahan Bekas Tambang Timah

Novalia, - and Dr. Eddy Nurtjahya, M.Sc., - and Dr. Ratna Santi, S.P., M.Si., - and Eka Sari, - (2022) Karakter Bakteri Azotobacter dan Azospirillum dari Rizosfer Tanaman Lada di Lahan Bekas Tambang Timah. Jurnal Bios Logos, 12 (1). pp. 46-54. ISSN 2656-3282

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Abstract

The negative impact of tin mining is that it can decrease the productivity of land functions for plant growth. Efforts to improve the soil that can be offered biologically by obtaining potential microbes such as Azotobacter and Azospirillum bacteria. This study aims to count up the population and to isolate and characterize Azotobacter and Azospirillum bacteria of pepper crop rhizosphere in ex-tin mined soil. The research site is Air Duren Village, Bangka Regency and Mesu Village, Central Bangka Regency. The research methods used are soil sampling, isolation, morphological and physiological characterization of biochemistry. The results showed the highest number of Azotobacter and Azospirillum bacterial populations found in the location of Mesu Village. Also obtained seven isolates that lead to the genus Azotobacter with isolate codes TMT6U3, TMT6U2, TST6U1, TST6U3, TMT7U3 and genus Azospirillum isolate code TST5U1, TST6U2 which are gram rods negative bacteria. The seven isolates show resistant to heavy metal Pb, not pathogen to plants, animals and humans.

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