Evaluation of the Use of Thiobacillus with Sulfur and Humic Acid on Some Cell Properties of Magnolia Tree in Calcareous Soil

In order to investigate the effects of humic acid and application of Tiobacillus fertilizer on better absorption of elements from limy soil and growth and development in Magnolia tree, a factorial experiment was conducted in a randomized complete block design with 4 treatments, each with 3 replications. Treatments included Loamy soil, organic humic acid (coal) and humic acid of vegetable origin (sugar beet) and Tiobacillus fertilizer with sulfur. The traits tested included Index of cell membrance stability and Relative water content of leaves. According to the results of this study, with the application of humic acid and Thiobacillus treatment with sulfur, the relative permeability of the membrane decreased and the relative humidity of the leaf of the tree increased. It was also observed that Thiobacillus treatment with sulfur was the most effective treatment in the desired traits and therefore in calcareous soils the application of Thiobacillus with sulfur powder could be recommended for cultivation and maintenance of Magnolia.