Nutrient dynamics with application of humic substances and liming in irrigated soil filled columns

Authors

DOI:

https://doi.org/10.5433/1679-0359.2021v42n3Supl1p1567

Keywords:

Organic compounds, Nutrient availability, Tropical soils.

Abstract

The objective of this work was to evaluate the retention of P, K, Ca and Mg nutrients, as well as pH and electrical conductivity in Oxisols. Soil samples were placed into columns, with addition of humic substances (soil with and without liming). The experiment was conducted in a greenhouse and the columns consisted of PVC tubes with 40 cm height x 5 cm diameter. The humic substances used were humic acid and fulvic acid, applied at rates of 0, 60, 120 and 240 L ha -1, in soil with or without lime. Ten irrigation events were performed, simulating 32 mm rainfall. After that, samples were collected from the columns, at 0-20 and 20-40 cm depths, to identify the residual effect of the addition of humic substances. A completely randomized design was used for this experiment, with 2×2×4 factorial statistical model and 3 replications. The results showed that, under acidic soil conditions, the use of fulvic acid provides more significant P release (up to 40%) in soil when compared to humic acid. When the rate of 240 L ha -1 is applied, the fulvic acid can release up to 83% of P in the soil.

Author Biographies

Cleire Oliveira, University of Rio Verde

Agronomic Engineer, M.e in Plant Production, University of Rio Verde, UniRV, Rio Verde, GO, Brazil.

Rose Luiza Tavares, University of Rio Verde

Profa Dra, School of Agronomy, UniRV, Rio Verde, GO, Brazil.

Renato Assis, Federal Institute of Education, Science and Technology of Goiás

Prof. Dr., School of Agronomy, Federal Institute of Education, Science and Technology Goiano, IF Goiano, Iporá, GO, Brazil

Veridiana Cantão, University of Rio Verde

Profa Dra, School of Agronomy, UniRV, Rio Verde, GO, Brazil.

Cássio Sitta, University of Rio Verde

Agronomic Engineer, M.e in Plant Production, University of Rio Verde, UniRV, Rio Verde, GO, Brazil.

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Published

2021-04-22

How to Cite

Oliveira, C., Tavares, R. L., Assis, R., Cantão, V., & Sitta, C. (2021). Nutrient dynamics with application of humic substances and liming in irrigated soil filled columns. Semina: Ciências Agrárias, 42(3Supl1), 1567–1578. https://doi.org/10.5433/1679-0359.2021v42n3Supl1p1567

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