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Ammonia Volatilization from Exposed Soil and Tanzania Grass Pasture Fertilized with Urea and Zeolite Mixture
- Campana, Mariana, Alves, Ana Carolina, Anchão de Oliveira, Patrícia Perondi, de Campos Bernardi, Alberto Carlos, Santos, Eduardo Alvarez, Herling, Valdo Rodrigues, Gomes de Morais, Jozivaldo Prudêncio, Barioni, Waldomiro
- Communications in soil science and plant analysis 2015 v.46 no.8 pp. 1024-1033
- ammonia, field experimentation, grasses, greenhouse experimentation, nitrogen, pastures, soil, summer, urea, volatilization, winter, zeolites, Tanzania
- The aim of this study was to evaluate the effects of a zeolite and urea mixture on ammonia volatilization. Two experiments were carried out: a greenhouse pot experiment and a field trial with Tanzania grass pasture. The pot experiment used five zeolite ratios (0, 12.5, 25, 50, and 100 percent relative to the N-urea level used) mixed with 100 kg ha ⁻¹ of nitrogen (N). The field trial used four treatments: 0, 12.5, 25, and 50 percent of zeolite, at the dose of 50 kg ha ⁻¹. In the greenhouse experiment, the smallest losses by volatilization occurred at the proportions of 25 percent and 100 percent. During the summer, the mixture of 25 percent of zeolite in N-urea led to a reduction in ammonia volatilization from 33.5 to 7.6 kg ha ⁻¹. However, in the winter, volatilization was very low, and there were no differences between the treatments. The addition of 25 percent of zeolite in urea was the most appropriate relation.