Effects of Shallow-deep Drainage Ditch on Soil Chemical Properties and Soil Enzyme Activities in Sanhu Farm

Abstract

Waterlogging has become a serious agricultural problem in Jianghan Plain. To lower groundwater level and mitigate the damage of waterlogging to crop growth, shallow-deep drainage ditch has been applied in agricultural production. The objectives of this study were to discover the effects of shallow-deep drainage ditch on soil chemical property and enzyme activity, and their correlations with each other. Winter wheat experiment was conducted from October to May in Sanhu Farm. Soil samples (0-20cm depth) were collected from five plots that were 1m, 3m, 5m, 7m, 9m away from deep drainage ditch, respectively. Soil water content (SWC), soil chemical properties and enzyme activities were measured in three growth stages of winter wheat. The results showed that SWC was increased with distance away from deep ditch. Soil chemical properties were lower at 1m and 7m away from deep ditch. Phosphatase and sucrase at 3m away from deep ditch were 11.31% – 21.49% and 42.95% – 64.04% increase, and urease at 7m was 6.24% – 44.29% increase compared to other sampling points, respectively. Soil nutrient contents and enzyme activities were positively correlated with each other except the relationship of total nitrogen and urease. Our studies demonstrated the improvement of soil chemical properties and soil enzyme activities in shallow-deep drainage z