Influence of accompanying ion on transport parameters of the nitrate in soil

Author(s)

Lívia Previatello da Silva

• Document type: Master's Dissertation
• Press: Piracicaba.
• Institution: Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC)
• Defense date: 2013-06-18

Examining board members

Jarbas Honorio de Miranda; Sergio Nascimento Duarte; Luiz Antonio Lima

• Advisor: Jarbas Honorio de Miranda

Abstract

With the current environmental concerns and the need to understand the processes that govern the movement of water and solutes in soil, studies are needed to allow increasing the efficiency of input use in agriculture that somehow can mitigate the impact of activities of this sector on groundwater contamination. Therefore, the objective of this work was to verify the transport parameters of the nitrate, by analyzing the influence of the accompanying cation on nitrate displacement, through the development of distributions curves of effluents (Breakthrough Curves (BTC)), under conditions of disturbed and undisturbed samples in saturated soil and steady state conditions, via application of nitrate solution at a concentration of 50 g m-3 NO3 -, by three different sources (Ca(NO3)2, NH4NO3 and KNO3) and for two types of tropical soils: Yellow Oxisol and Anfisol. The experiment was conducted in the Laboratory of Soil and Water Quality, Department of Biosystems Engineering from Escola Superior de Agricultura \"Luiz de Queiroz\", Piracicaba - SP. The transport parameters of the nitrate at a concentration of 50 g m-3 in their respective soils were obtained by a numerical fit using the software STANMOD. From the results, it could be seen that the nitrate displacement is linked with the soil characteristics and the leaching was higher in Anfisol. In terms of the influence of accompanying cations of nitrate, in its various different sources, it can be said that their effects were not observed in nitrate mobility in the soil profile. (AU)

• FAPESP's process: 11/16438-0 - Influence of accompanying ion on transport parameters of the nitrate in soil
• Grantee: Lívia Previatello da Silva
• Support Opportunities: Scholarships in Brazil - Master