Study on Soil Compaction of Greenhouse Gaused by Machine Repair in Ningxia

Caused by the second-generation greenhouse wall constructed by heavy machine.This article was designed to study soil compaction,permeability deterioration and other problems caused by.This article analyzed the soil compaction,bulk density,porosity,field water holding capacity and other soil physical properties changes in greenhouse.The results showed that: After large mechanical rolling and compaction,from the field to the horizontal wall the the soil physical properties were seriously degenerated,the soil compaction increased by 90 kg,field water capacity decreased by 35 g and bulk density increased by 0.42 g/cm3,the total porosity decreased by 17%,non-capillary porosity decreased by 14%.On the vertical direction,from 0-60 cm, bulk density of plough layer,porosity,non-capillary porosity decreased with increasing of the depth.The soil bulk density below 60 cm plough layer and field water capacity were little affected by mechanical operation.