Effects of sewage sludge compost on the physicochemical properties of the aeolian sandy soil

摘要

The aim of this study was to assess the effects of the addition of sewage sludge compost(SSC) on the properties of aeolian sandy soil by measuring electric conductivity(EC),pH value,bulk density,field capacity.total N(TN),total P(TP),organic matter(OM),available N,available P and available K.Seven treatments were included in this experiment,the SSC was applied at rates of 0,2,5,10,15,20,25 kg-m~(-1).The results showed that the physichemical properties changed greatly with the addition of SSC to the soil. As forphysical properties of the soil, bulk density decreased gradually, the field capacity increased significantly compared with CK, As for chemical properties, pH changed inapparently, the concentration of OM and other nutrients were positive correlated with SSC dosages. It was concluded that the addition of SSC could enhance the soil's fertility and improve the soil's physical structured was an effective disposition way for sewage sludge to be used as the organic fertilizer in soil.