The effects of grass residue of sophora alopecuroides

seeds residue of sophora alopecuroides and licorice residue on soil physical-chemical properties

microbial quantities and enzyme activities in abandoned salkaline land in arid area of Ningxia Hui Autonomous Region were studied. The results showed that the soil bulk density

pH value and total salt content after applied with residue were lower than not applied with residue(CK)

especially the total salt content and pH value decreased significantly. Soil organic matter

total phosphorus

available nitrogen

available phosphorus and available potassium increased significantly

and there existed significant difference in available nitrogen

available phosphorus and available potassium between different treatments

and also

the ability to provide available potassium and available nitrogen of seeds residue of sophora alopecuroides is significantly higher than that of grass residue of sophora alopecuroides and licorice residue

the ability to provide available phosphorus of licorice residue is significantly higher than that of grass residue of sophora alopecuroides and seed residue of sophora alopecuroides. After the application of waste residue

the number of soil bacteria

fungi and actinomycetes were significantly higher than that of CK. The activity of alkaline phosphatase increased significantly by application of seed residue of sophora alopecuroides and licorice residue

and the activity of soil catalase increased significantly by application of seeds residue of sophora alopecuroides. Soil organic matter

available nitrogen

available phosphorus and available potassium showed a significant correlation with microbial quantities and enzyme activities

which were promoted each other.