Abstract: | Substrates have been increasingly used in recent years for carnation crops. Burnt rice husk (BRH) is widely available and used as a substrate in Colombia. The present work aims to compare the effects of two aqueous extraction methods on the chemical contents. Saturated and 1:1 (v/v) extractions were performed in three replications. Ionic forms of the macronutrients (NO3?, NH4+, PO4H2?, K+, Ca2+, Mg2+, and SO42?, in meq L?1), micronutrients (Fe, Mn, Zn, Cu, and B, in mg L?1), Cl?, CO3 H? in meq L?1, electrical conductivity in dS m?1, and pH were analyzed. Except for NH4+, Cl?, and B the determination coefficient R2 was greater than 95 percent. Average values and standard errors of data have been used to define suitable intervals for 1:1 extractions. Proposed intervals for 1:1 extracts are consistent with the saturated extract and therefore are a good tool to optimize the management of fertigation in those crops. |