Biogenic and Common Lime Characterization in Granular and Powder Forms and Their Application in Sowing Furrows for Soybean Crops

ABSTRACT

The application of alternative and sustainable soil correctives to increase soil pH in sowing furrows can promote yield increases in soybean crops. The aim of this study was to characterize two different soil corrective sources in granular and powder forms and to evaluate the agronomic efficiency of their complementary application in a sowing furrow of a soybean crop. Two experiments were conducted. Regarding the first experiment, there were 5 treatments: control, biogenic lime powder, biogenic granular lime, common lime powder, and common granular lime. All applications were performed in a seeding furrow at a dose of 16 kg ha⁻¹. The experiment was carried out in randomized blocks with five replicates. The second experiment involved the characterization of the sources and their forms by means of X-ray diffraction, total chemical analysis and neutralization power. The results showed that in comparison to the control, the application of correctives to increase soil pH in the sowing furrow promoted significantly higher growth and greater soybean yield, although the sources did not differ from each other. The soil pH corrective application in the sowing furrow was important for dissolution in the soil and consequently soybean yield. The neutralizing capacities of the correctives for all the granulometries tested were similar. Therefore, applying these soil pH correctives in granular or powder forms in sowing furrows might be an additional management alternative.

KEYWORDS:

• Correctives
• granulometry
• Lithothamnium
• canopeo
• X-ray diffraction

Acknowledgments

The authors thank Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq-PROC 141140/2017-8) and Grupo de Estudos em Solo (GESSO-UEM). There is no conflict of interest in terms of performing the research and publishing this manuscript.