Bovine manure and rock powder and their influences on the chemical characteristics of a Latossolo soil type (yellow oxisols) under butter kale (Brassica oleracea L. var. acephala) cultivation

Abstract

Chemical soil quality is one of the factors more quickly affected by anthropogenic degradation processes and is one of the more important components for the development of agriculture. Thus, this study aimed to evaluate the effects of different doses of cattle manure and rock powder on the chemical characteristics of soil cultivated with butter kale. The treatments were arranged in five randomized blocks in a 4´4 factorial for the different doses of bovine manure (60, 120, 180 and 240 g/plant) combined with doses of rock powder (6, 12, 18 and 24 g/plant). Each block was composed of three plots, 18 m long and 1 m wide. The bed was composed of six portions, and each experimental plot consisted of 14 plants spaced at 0.40´0.40 m. At the end of the experiment, the following were analyzed: pH, organic matter, P, K, Na, Mg, exchangeable acidity, cation exchange capacity (CEC), sum of base and base saturation. The doses of bovine manure and MB-4 provided an increase in pH, organic matter, concentration of phosphorus, potassium, sodium, calcium, magnesium, exchangeable acidity, cation exchange capacity, sum of the base and saturation of the soil base. The doses of 240 g of cattle manure and 24 g of rock dust generated an increase in the chemical properties of the soil.

Potential of olivine melilitite as a soil remineralizer according to particle size and rates

“…In acid soils, such as the Humic Dystrudept, with high OM contents, the addition of rock powder in association with manure or organic residues or in a pre-composting with the used products may further increase the dissolution of the rock minerals due to the action of the organic acids present in the OM, as reported by Wolschick et al (2016), Tavares et al (2018), andPereira et al (2019). In the present study, this was observed with the application of the rock powder in the two particle size ranges (mainly the filler at the highest rate), being confirmed by the higher nutrient contents released in the Humic Dystrudept, whose OM (6.0%) is higher than that of the Typic Hapludult (2.9%).…”

“…release by the rock powder of the nutrients required by the plants in each phenological stage until the completion of their cycle (Ramos et al, 2014;Pereira et al, 2019;Manning & Theodoro, 2020).…”