Conditioning of saline compost for use as cultivation substrate
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the most common problems of these materials for this use. This problem can be easily treated in different ways. In this paper we evaluate two of these techniques: one is a quick washing (15 h) with tap water prior to cultivation, and the other consist in a gradual washing (60 days) by watering with nutrient solution (NS). The aim of this paper is to compare the two methods, in terms of effectiveness and assess the dynamics of nutrient release, as most appropriate technique for managing salinity of compost with high E.C. (18,7 dS m-1 in saturation extract). In both trials there was a rapid and significant decrease in E.C. Three times the volume of its container capacity (CC) was sufficient to reach values of E.C. in leachate below to 4 dS m-1. The leaching efficiency was higher in the case of watering with SN especially more harmful ions such as Na+, Cl- and SO4 2-. Ion release by leaching followed similar patterns in both cases except for phosphate, calcium and magnesium.
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