Silicon Adsorption on Clay Soils Affect by Silicon and Phosphorus Addition Using Freundlich Adsorption Model

Abstract

Silicon (Si) is an element, not essential, but is beneficial for some plants. The Freundlich model was used to describe Si adsorption on soil samples which pretreated with different Si and phosphorus (P) concentrations and inculpated for 60 days. Soil incubated samples were: T₁ soil had no Si or P (control); T2, T₃ and T₄ soils contained 50, 100, and 200 mg Si L^-1, respectively. T₅ and T₆ soils contained 50 mg Si L^-1 in combined with either 7 or 10 mg P L^-1 along with T₇ and T₈ soil contained 100 mg Si L^-1 in combined with either 7 or 10 mg P L^-1. Finally, T₉ and T₁₀ soil contained 200 mg Si L^-1in combined with either 7 or 10 mg P L^-1.