<b>The effects of industrial waste from enzyme production on pasture growth and soil chemical properties

Abstract

ABSTRACT. Farmers have used liquid waste from the enzyme industry as fertilizer. To determine the impact of liquid waste from enzymes (LWEs) on soil properties, plant growth and nutrient content in pasture, an experiment was conducted with five different rates of LWE application (0, 45, 90, 135 of LWE was applied in every treatment. Soil was sampled on four different dates and at four different depths (0-10, 10-20, 20-40 and 40-60 cm) , K + and P in the 0-10 cm layer, indicating that the effect of LWE is corrective concerning these attributes. There was also improvement in pasture quality through increased levels of N, P and K in plants during the first year of waste application. The use of larger doses of LWE led to increases in productivity (42.6 kg dry weight m -3 residues). These results indicate that the application of LWE is feasible for the fertilization of this grassland containing low-fertility acidic Cambisol.Keywords: soil acidity, forage, carbon, fertilizater.Resíduo de indústria de enzimas no crescimento da pastagem e propriedades químicas do solo

Chemical attributes of soils with eggshell application

“…Similar results regarding the neutralization of soil acidity were also obtained by Branco et al (2013); Lasso et al (2013); Raymundo et al (2013) and Giostri et al (2014), using different types of residue. Branco et al (2013) verified an increase in the pH and a decrease in the potential acidity of two soils with different clay contents (142 and 390 g kg -1 ) with the application of doses of alkaline solid waste from the paper and cellulose industry.…”

“…Lasso et al (2013) verified that the application of civil construction and demolition waste, from concretes, cement and hauling, sieved in a 2-mm mesh, corrected the soil acidity, since there was an increase in the pH and a decrease in the value of H+Al. Giostri et al (2014) verified, under field conditions, an increase in the soil pH, with high buffering power, after the application of up to 180 m 3 ha -1 of liquid waste from the enzyme industry.…”