NITROGEN VARIATION LOSS WITH SOIL pH

Abstract

It is known that various factors influence the losses of soil ammonium by volatilization. However, in this work it was tried to study the loss of ammonium in soils of the Universidade Federal Rural do Rio de Janeiro. It was used the complete randomized design with three replications. The experiment was carried out in the greenhouse in plastic pots. The pots were covered with a plastic screen and then a thin layer of glass cotton wetted on H2SO4 was placed above it. The four series of soil used were: Ecologia, Seropédica, Itaguai and Piranema. Nitrogen fertilization was of 200mg of N/Kg of soil. The statistical analysis with the soils of the series Itaguai, Seropédica and Ecologia showed a significant difference at the 5% level between the treatments. It was observed in these soils that when the pH became less acid there was an increase in the losses of ammonium by volatilization. In the experiment with the soil of the series Piranema there was no significant difference in the losses of ammonium in any of the three pH levels.