To explore effects of liquorice(Glycyrrhiza Uralensis) plantation on soil erosion

texture and contents of organic carbon(OC) and total nitrogen(TN) through measuring vegetation coverage

height above-ground biomass and topsoil(0-5 cm) erosion

texture

nutrient conservation under cover

analysis was done of the liquorice vegetation for characteristic indices and of the topsoil texture and nutrients. Results showed that with the liquorice vegetation growing on

coverage

height and biomass of the vegetation

and silt+clay

very fine sands

OC and TN in the topsoil all significantly increased

while wind erosion significantly decreased(P＜0.05). Correlation analysis indicated that characteristic indices were significantly and positively related to soil silt+clay

very fine sands

OC and TN contents(P＜0.01). Regression analysis demonstrated that for every 1g of increase in biomass

the content silt+clay

OC and TN in topsoil increased 0.048 9 %

0.012 g/kg and 0.001 1 g/kg; for every 1% of increase in topsoil silt+clay

the content of OC and TN increased 0.220 3 g/kg and 0.018 5 g/kg

respectively. Obviously

the adoption of practice of planting liquorice on farmland of wind erosion of Northwest China

may reduce wind erosion of the surface soil

and increase the amount of fine particulate matter and hence content of OC and TN

and soil fertility could be recovered and improved.