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Nitrogen mineralization in soils cultivated with plantain (Musa AAB Subgroup plátano cv. Hartón), Zulia state, Venezuela

A. González-Pedraza,J. Escalante

Published 2021 in Revista de la Facultad de Agronomía, Universidad del Zulia

ABSTRACT

The main source of N in the soil is organic matter; therefore, its availability depends on its quantity and quality, microbial activity, soil characteristics and management. An efficient way to quantify available N is by mineralizing it as ammonium (N-NH ) and nitrate (N-NO ). Therefore, in this study, the total and available N was determined in soil samples 0-20 cm deep from two plots with plantain plants (Musa AAB plantain subgroup cv. Hartón) with high and low vigor (AV and BV, respectively), in the South of Lake Maracaibo. Total N was determined by the Kjeldalh method and the mineralization of available N by incubation under laboratory conditions for 10 weeks. The accumulated mineralized N (Nm), the constant mineralization rate of (k) and the potentially mineralizable N (N0) were calculated. A one-way analysis of variance was applied, when it was significant (p<0.05), a Tukey test was applied for multiple comparisons of means. Total N was low (<0.025 %) and did not present statistical differences (p<0.05) between AV and BV. The accumulated mineralized N-NO was statistically (p<0.05) higher (524.47 mg.kg-1) in BV, while the N-NH did not present differences between AV and BV. Only k was statistically higher (0.07 ± 0.03; p<0.05) in BV. Nitrification was the process that prevailed especially in BV where organic carbon was higher and presented a higher percentage of sand.

PUBLICATION RECORD

  • Publication year

    2021

  • Venue

    Revista de la Facultad de Agronomía, Universidad del Zulia

  • Publication date

    2021-07-13

  • Fields of study

    Agricultural and Food Sciences, Biology, Environmental Science

  • Identifiers
    DOI 10.47280//REVFACAGRON(LUZ).V38.N3.04
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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