Assessing nutrient leaching in red-yellow latosol: The role of swine water and irrigation water reuse

Abstract

This study evaluates some micro- elements, phosphorus, copper and zinc leached in lysimeters with
red-yellow Latosol under different rates of reused water and irrigation water. This was done for a period
of 40 days (August to October 2014) at the initial cycle of cauliflower cultivar ‘Verona CMS’, in
Sinop/Mato Grosso. Reused swine water (0, 50 and 150 m3
ha-1
) was applied in one portion before
transplanting. Irrigation water of 100, 125 and 150% with crop evapotranspiration potential (ETc) was
used in a drip irrigation system daily. Leachate samples were taken at 10, 20, 30 and 40 days after
applying the reused water. With balanced leached phosphorus (P), a higher percentage of P retained in
the soil was observed, indicating low mobility of this element. The concentrations of copper in the
leachate were low at 150 m3
ha-1
rate after the reuse of swine water, at day 20. 150 m3
ha-1
used in the
irrigated lysimeters with 100% ETc is a good alternative for vegetable crops with a short cycle (less
than 40 days), in Sinop/Mato Grosso, as it does not exceed the limits of the Conama Resolution No.
396/2008