Ultisols fertility and morphological characteristics of N-fixing bacteria from oil palm rhizosphere

Authors

  • Indah Oktari Universitas Labuhanbatu, Faculty of Science and Technology, Rantauprapat, Sumatera Utara, Indonesia.
  • Novilda Elizabeth Mustamu Universitas Labuhanbatu, Faculty of Science and Technology, Rantauprapat, Sumatera Utara, Indonesia. https://orcid.org/0000-0003-2800-8920
  • Hilwa Walida Universitas Labuhanbatu, Faculty of Science and Technology, Rantauprapat, Sumatera Utara, Indonesia.

Abstract

Exploratory studies on microorganisms from the oil palm rhizosphere can be used to increase the nitrogen availability in acidic soils. The present study aimed to determine the soil nutrients and obtain the relationship among the soil chemical characteristics, as well as the morphological and microscopic characteristics of N-fixing bacteria isolates, in Ultisols from the oil palm rhizosphere. The Ultisols fertility was classified as very low to moderate. In addition, the increasing soil pH toward neutral increased the cation exchange capacity, exchangeable cations (Ca2+, K+ and Mg2+), total N, organic C and available P. Nitrogen-fixing bacteria isolates with varied shapes (circular, concentric, irregular and diffuse) and edges (wavy, slippery and irregular) were found, and the dominant type of isolate presented raised elevation. Four types of isolate had a white color and only one a clear color. Three Gram-positive and two Gram-negative bacteria isolates showed a bacillus shape.

KEYWORDS: Elaeis guineensis, soil microorganisms, Gram-positive and Gram-negative bacteria.

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Published

2021-12-09

How to Cite

OKTARI, I. .; MUSTAMU, N. E.; WALIDA, H. . Ultisols fertility and morphological characteristics of N-fixing bacteria from oil palm rhizosphere. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 51, p. e68559, 2021. Disponível em: https://revistas.ufg.br/pat/article/view/68559. Acesso em: 17 jul. 2024.

Issue

Vol. 51 (2021)

Section

Scientific Note

License

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