Abstract

CICHELERO, Luis Henrique et al. Effect of pig slurry doses on soybean, wheat and corn seed germination. Investig. Agrar. [online]. 2023, vol.25, n.1, pp.11-18. ISSN 2305-0683.  https://doi.org/10.18004/investig.agrar.2023.junio.2501724.

Pig production generates effluents that, when applied to the soil, serve as a source of fertilizer and, when applied without adequate treatment, alter the environmental quality. These wastes contain potential contaminating elements whose excessive application generates an accumulation of materials and can cause toxic effects for plants, such as seed germination. This study aimed to analyze the effect of doses of pig slurry (SP) on seed germination of three grain crops of agricultural interest. The assays were carried out under laboratory conditions with soybean, wheat, and corn seeds placed in Petri dishes, with ten seeds per dish. SP doses/treatments, chemically characterized, corresponding to 0, 1,4, and 2,1 tSD (times the Standard Dose) m³ ha-1 were applied with three replicates. The plates were placed in the BOD at temperature 24°C. The data obtained were analyzed using the Tukey test (5%). Seven days from the beginning of the trial, the percentage of germination was determined. SP has in its composition some potential contaminating elements, such as copper, zinc, and ammonium, which can cause damage to the germination of several cultures, especially with direct exposure of the seeds in Petri dishes. Soybean and wheat seeds were significantly affected by the application of SP, showing a reduction in the germination rate with the use of 100 and 150 m³ ha-1. The application of the equivalent of 1,4, and 2,1 tSD m³ ha-1 of SP did not significantly affect the germination of maize seeds.

Keywords : toxicity; seedling emergence; organic fertilizer; pig farming.

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