Effect of the PPA on Soil Physical Properties and Soil Erosion under Artificial Rainfall Experiment in Loess Slope

摘要

Chemical conditioner provide new territory for studying China's agricultural practices, and for soil and water conservation. This study applied different consistencies of soil conditioner - polypropylene acid to China's Loess. This soil conditioner was elected macromolecule polymers of high water absorption strength in early water retention test. Through indoor soil sample's Scanning Electron Microscope (SEM) and soil physical experiments and outdoor artificial rainfall simulations, effects polypropylene acid (PPA) on soil structure properties and runoff-sediment in loess slope was studied. Compared with the control (no amendment) treatment, application of conditioner have the ability to improve the physical condition of a soil for better aeration, water-holding capacity and infiltration, porosity, structural stability, erodibility, and decreasing erosive forces of raindrop impact and flowing water, reducing surface crusting and improving water infiltration, delaying runoff engenderation and decreasing runoff velocity: and soil erosion yield. Finally, this study also ascertained optimal application quantities of conditioner