Abstract

GARZON MARIN, Ilán; CRUZ, Eliana Carolina; INFANTE, Alexis  and  CUERVO, Jairo Leonardo. Effect of flower waste compost on some, physical, chemical, and biological properties of the soil. Acta Agron. [online]. 2022, vol.71, n.2, pp.111-118.  Epub May 31, 2023. ISSN 0120-2812.  https://doi.org/10.15446/acag.v71n2.88900.

The objective of this research was to evaluate the effect of the application of flower compost on some physical, chemical and biological properties of the soil. The composts used were 100 % Dianthus spp. residues, 100 % Sunflower, and a mixture of both (50-50 %). They were incorporated into the soil (Tapthic hapludand) at doses of 8, 12, and16 kg.m-2, and an unapplied witness. A factorial experimental design of repeated measures in time was carried out with two factors, the first corresponded to the type of compost, the second to the doses. Bulk density, total porosity, organic carbon (CO), soil respiration, and colony-forming units of phosphate solubilizing, and nitrogen- fixing bacteria were evaluated. In the results obtained, it was observed that the apparent density of the soil decreased with the application of sunflower and dianthus compost at a dose of 16 kg.m-2 by 17% and 25% respectively compared to the initial value (1.14 g.cm-3). In the dose of 16 kg.m-2, the total porosity increased with respect to the initial value by 8.1 % with the sunflower compost and 10.5 % with the incorporation of the mixed compost. The CO increased with respect to the initial value by 2.33 % in the mixed treatment at a dose of 16 kg.m-2. Respiration did not show statistical differences with respect to the control. In the phosphate solubilizing bacteria, the dose of 16 kg.m-2 showed the highest value with 3.5 X 106 CFU/g of soil for the mixed compost; and for the nitrogen fixers, the highest values were recorded at a dose of 16 kg.m-2 for mixed compost with an average of 3.025 x 107 CFU/g of soil. With the results obtained, it can be inferred that the incorporation of mixed compost into the soil at a dose of 16 kg.m-2 has a positive effect on the physical, chemical, and biological properties of the soil in the short term.

Keywords : bioinput; waste decomposition; organic amendment; organic fertilizer; soil improvement.

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