Effect of adding zeolite and sewage sludge on the available of microelements in light texture calcareous soil

Abstract

The study was conducted in the Agricultural Scientific Research Station in Lattakia, (the experimental fields of Al-Hanadi station) on sandy loam calcareous soil to determine the effect of adding different rates of zeolite and sewage sludge on the availability of microelements in soil.

The results showed significant differences in the values of available iron between all treatments comparing with the mineral fertilization treatment, and The highest values were with the treatment adding of sewage sludge zeolite. Moreover, there were significant differences in the values of available Cu, too with zeolite₂+ sewage sludge, and zeolite₁ + sewage sludge and sewage sludge comparing with zeolite₂+ sewage sludge, and zeolite₁ + sewage sludge and sewage sludge treatments. it was noticed there were significant differences in the values of available Mn and Zn when the sewage sludge was added alone or mix with the first level and second of zeolite, and the highest values were ​​in the treatment zeolite₂+ sewage sludge, and the differences were insignificant in zeolite₂+ sewage sludge, zeolite₁ + sewage sludge and sewage sludge, so that the addition of sewage sludge and zeolite was very important in supplying the soil with available microsegments for plants.