Improvement of mining soil properties through the use of a new bio-conditioner prototype: a greenhouse trial

Autor: Manuel Pantoja-Guerra, Ramiro Ramirez-Pisco, Nelson Valero-Valero
Rok vydání: 2018
Předmět:
Zdroj: Journal of Soils and Sediments. 19:1850-1865
ISSN: 1614-7480
1439-0108
DOI: 10.1007/s11368-018-2206-x
Popis: The effect of a prototype of humic bio-conditioner (H-BC) was assessed on the development of edaphic properties and the growth of maize plants in an edaphic material used as topsoil in the rehabilitation of soils in a coal mine in Colombia. The trial was carried out in a greenhouse, using pots with edaphic material treated with the addition of doses equivalent to 0 (control), 1, 2, and 4 Mg.ha−1 of H-BC; maize seeds were sown and followed up on for 60 days. Plant growth and soil biological, chemical, and physical variables were registered. The 4-Mg.ha−1 treatment maintained a significantly higher enzymatic activity than the control on day 60. The respiration of the soil treated with H-BC increased significantly, with the 4-Mg.ha−1 treatment standing out. The 2-Mg.ha−1 treatment induced the most noticeable changes in soil metabolic activity profiles. Increases in root and leaf development were observed in the treatment with 4 Mg.ha−1; apparently, this dose improved the absorption of Ca, K, and S by plants; the physical and soil aggregation indices increased significantly with 4 Mg.ha−1. The results indicate that H-BC can be an alternative as an enhancer of the edaphic material used in soil rehabilitation processes.
Databáze: OpenAIRE
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