Potassium supplying capacity of some lowland soils under potassium fertilization and successive croppings

Authors

  • Fábio Steiner Universidade Estadual do Mato Grosso do Sul
  • Maria do Carmo Lana Universidade Estadual do Oeste do Paraná
  • Tiago Zoz Universidade Estadual do Mato Grosso do Sul
  • Alan Mario Zuffo Universidade Estadual do Mato Grosso do Sul

DOI:

https://doi.org/10.14393/BJ-v36n3a2020-47727

Keywords:

Exchangeable K., Intense cropping, Non-exchangeable K., Soil potassium budget

Abstract

The effects of intense cropping and potassium fertilization on potassium (K) dynamics and non-exchangeable K release from three lowland soils of Paraná State, Brazil, were investigated in this study. Samples of three lowland soils were fertilized or not with K and subjected to six successive croppings (soybeans, pearl millet, wheat, common beans, soybeans, and maize). The crops were grown in 8-L pots for 45 days, and at the end of the sixth cropping, the soil from each pot was sampled to the determination of soil K pools. The lowland soils differ in the ability to K supply to the plants in the short to medium term due to the wide range of origin material and the concentration of K in solution, exchangeable K, non-exchangeable K, and structural K. When the soils were not fertilized with K, the successive cropping resulted in continuous depletion process of non-exchangeable and exchangeable K; however, this depletion was less pronounced in soils with a higher potential buffer capacity of K. Non-exchangeable and exchangeable K concentrations were increased with the addition of K fertilizer, indicating the occurrence of K fixation in soil. The non-exchangeable K contribution to K nutrition of plants ranged from 44 to 69% in the treatments without the addition of K fertilizer, reporting the importance of non-exchangeable K pools in the supply of this nutrient to plants in agricultural production systems.

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Published

2020-04-13

How to Cite

STEINER, F., LANA, M. do C., ZOZ, T. and ZUFFO, A.M., 2020. Potassium supplying capacity of some lowland soils under potassium fertilization and successive croppings. Bioscience Journal [online], vol. 36, no. 3, pp. 799–809. [Accessed23 May 2022]. DOI 10.14393/BJ-v36n3a2020-47727. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/47727.

Issue

Section

Agricultural Sciences