Dynamics of the physical-chemical properties of vermicompost from ovine manure combined with forage
Keywords:
organic fertilizers, Eisenia foetida, vermicompost, organic solid wasteAbstract
The physicochemical properties of vermicompost produced by the "red Californian" (Eisenia foetida) worm from sheep manure and three types of forage (bean, corn, alfalfa) were evaluated to describe its dynamics. One kilogram of material mix was used per experimental unit, with a planting density of 150 worms per container. Watering was done every 3 days, with an adaptation period of one month. Four samplings were conducted (at 30, 45, 60, and 90 days), with three repetitions. The properties evaluated included the interaction of pH over time (p<0.05), starting as alkaline and trending towards acidity. The opposite occurred with electrical conductivity (EC), which showed an increase in values as the study progressed. Nitrogen increased, and the percentage of organic matter decreased, leading to a reduction in the carbon ratio. The phosphorus and potassium content in the final vermicompost decreased; however, other salts (Ca, Na, Cl, HCO3, SO4, Mg) increased. This was corroborated by ash content and EC values, which were different (p<0.05). The best vermicompost was the one that integrated all three forages, while the highest accumulation of sodium and carbonates occurred in the treatment with bean residues, and the lowest contribution of organic matter was observed.
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