Study On Undisturbed Cultivated Land Erosion Character By Erosion Wind Tunnel

The erosion character of surface of cultivated land that is studied by movable erosion wind tunnel is one of the important ways of soil erosion problems. According to the foreign and domestic researching situations, the cultivated land samplers and both sides folded sampler boxes are developed by author. Parameter of cultivated land sampler contents condition of undisturbed soil sample. There is uncomplicated structure for sampler box to move and transport conveniently.Undisturbed farmland samples of fall ploughed land and wheat stubble, which were taken from farmland by cultivated land sampler, were carried out some scientific experiments at the lab of wind tunnel. On clean wind and wind-sand flow condition, it made some experiments about fall ploughed land. Under of different wind speeds, the relationships of vegetation coverage ratio, stubble height, ridge direction, wind-sand flow and wind-blown mass is researched with orthogonal test design for undisturbed soil sample experiments of wheat stubble, and primary and secondary factors were found for wind-sand flow with orthogonal test design too. Therefore, the way is available to attain orthogonal multinomial regression equations and analyze experimental results. Undisturbed soil sample experiments were researched preliminarily at erosion wind lab.