Abstract:The objective of this study was to predict the potential influence of sulfur-coating material left in the soil from using sulfur-coated urea(SCU)on agricultural ecosystem.In order to find effects of sulfur in the coating of SCU on cole growth and soil chemical properties,a pot experiment,which was designed to have 6 treatments,was conducted.Results of the experiment indicated that both the coating and sulfur applied could significantly enhance activity of Fe,Mn and Zn in the soil,and affect contents of water-soluble K+,Na+,Ca2+,Mg2+,SO42-,HCO3-,and Cl- in the soil.Besides,they tipped the original acid-base balance and redox balance of the soil,which was represented as increase in soil exchangeable acid and exchangeable Al,but decrease in soil pH,and contents of reductive material and active reductive material.At the same time they were shown to be able to promote cole growth and uptake of N,P,K and S.Application of sulfur could still have some crop response in yield in SCU treatments.The short-term impact of sulfur-coating on soil chemical properties was weaker than that of sulfur.