Influences of Pulping Wastewater Irrigation on the Soil Properties and the Activity of Urease

The dynamic influences of irrigation with pulping wastewater on soil physiochemical properties,soil respiration and activity of urease in soils were investigated in the field and pot scale.The results showed that the amount of organic matter in the soils and pH values increase.Soil respiration is simulated at the beginning of irrigation,but it recovers to the original value after 25 days.Higher concentration of the wastewater leads to higher simulation effect.The activity of soil urease decreases slightly within the first 10 days,and then increases.