Performance of Lettuce Submitted to the Rock Dust Remineralizer and Doses of Efficient Microorganisms

Abstract

The use of soil remineralizers with efficient microorganisms (EM) can represent an effective and sustainable alternative to improve the growth, development, and yield of cultivated plants. Thus, the present study aimed to evaluate the effect of different doses of EM, in the presence or absence of rock dust (RD), on the development of iceberg lettuce, cultivar Lucy Brown. The design used was completely randomized, arranged in a 2 x 5 factorial scheme, with four replications. The treatments consisted of the presence and absence of RD in the substrate composition, combined with five commercial product doses based on EM (0, 2, 4, 6, and 8 L ha-1). At 30 days after transplanting, root and stem length, head circumference, the number of leaves, stem diameter, leaf area, fresh matter of root, stem, leaf, and shoot, and dry matter of root, stem, leaf, and shoot were evaluated. There was an interaction between the factors for most variables of economic importance. The dose of 4.5 L ha-1 of the product based on EM, combined with PR, implied the best performance of iceberg lettuce under the studied cultivation conditions.

Mining waste associated with bioinoculants and cattle manure for the mineral nutrition and growth of maize

“…These results demonstrated that the vermiculite mining residue, associated with organic matter and/or beneficial microrganisms, was not able to fully replace the soluble sources of nutrients, as has been observed in other studies (Sousa et al, 2021;Almeida et al, 2022). However, these materials can improve the performance of plants compared to non-fertilized plants, possibly by replacing part of the mineral fertilizer that would be provided by soluble sources (Curtis et al, 2023).…”