Abstract

ROLON GALEANO, Mirelly Paola et al. Availability of copper in soils of the Oriental Region of Paraguay. Rev. ciente. UCSA [online]. 2022, vol.9, n.1, pp.72-80. ISSN 2409-8752.  https://doi.org/10.18004/ucsa/2409-8752/2022.009.01.072.

Copper (Cu) is a micronutrient required by plants in small amounts, and there are few studies related to the availability of this nutrient in Paraguayan soils, so it is important to know its availability and distribution. The aim of the research was to classify the availability of Cu in soils of the oriental region of Paraguay at the district level. For this, a database was generated with the results of soil analysis from the FCA-UNA, CIHB-IPTA and FUCAI-UCA laboratories. The availability Cu content of the soils of 11,395 samples was classified as "high" (>0.8 mg kg-1); “medium” level (0.8 - 0.3 mg kg-1) and “low” level (<0.3 mg kg-1), generating a Cu availability map at the district level. Descriptive statistics were performed from the Cu values. Of the 234 districts that make up the oriental region of Paraguay, 71% presented a "high" level, 8% a "medium" level, and 4% a "low" level. The department with the highest average value of Cu was Itapúa with 12.3 mg kg-1) and the lowest average value of Cu was Concepción with 0.8 mg kg-1. Considering the total number of soil samples analyzed, 8,090 samples presented "high" levels of Cu. The soils of the Eastern region present a predominance of soils with high availability of Cu, ideal for agricultural, livestock and forestry production systems.

Keywords : micronutrient; soil copper level; trace elements; crop production systems.

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