Effects of Different Exogenous Organic Materials on Improving Soil Fertility in Coastal Saline-Alkali Soil

The coastal saline-alkali soil in eastern China is an important reserve arable land resource. Adding exogenous organic material effective way to improve fertility and promote the conversion of agricultural soil. In this study, a field plot experiment was used investigate influences different materials (vinegar residue, VR; sewage sludge, SS; vermicompost, VC) on reduction salinity-alkalinity barrier factors, accumulation carbon (SOC), improvement results indicated that applying types reduced electrical conductivity (EC) pH, promoted SOC accumulation, increased barley yield. With same application rate, VR more beneficial reducing EC accumulating SOC, increasing yield compared SS VC applications. particular, with higher than applications by 18.4% 26.6% average, respectively, during two-year experiment. Correlation path analysis revealed significantly negatively correlated factors (EC pH), but VC-treated soils had indirect negative effect yield, while VR-treated direct (−2.24). addition, (−4.46) (5.39) contributions were those VC, contribution aggregate lower VC. Therefore, applications, led fast rapid which for yields