Analysis of the sodium saturation index in red fertirrigated latosil with dairy effluent
DOI:
https://doi.org/10.6008/CBPC2179-6858.2020.005.0009Keywords:
Agriculture, Sodium, Reuse, Mombasa grass, ProductivityAbstract
The purpose of this study was to evaluate the impact that sodium in dairy effluents can have on the variation of the sodium saturation index (ISNa) in fertirrigated red latosol. To obtain this information, an experiment was set up consisting of five treatments with four repetitions planted with Panicum maximum grass. The treatments were formed according to the sodium concentrations, providing: 75; 150; 300 and 600 kg ha-1 of Na+; and a control treatment with irrigation water. Soil samples were collected at depths of 0-10, 10-20, 20-30 and 90-100 cm for analysis. The exchangeable cations were obtained through flame photometry and atomic absorption, the ISNa values were obtained through calculations involving these cations. The results showed that the analyzed soils can receive dairy effluent with concentrations up to 600 kg ha-1 without undergoing significant sanilização.
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