Simulation And Research Of Preventing Wind Erosion Effect On The Erect Stubble Height Of The Different Crops By Wind Tunnel

By taking the erect stubble of naked oats farmland, cole farmland, grass-millet farmland and potato tilth in Inner Mongolia Academy of Agricultural Sciences Wuchuan dry Experimental Station as the study object, anti-wind erosion capabilities of the different crops have been studied, compared anti-wind erosion capabilities of the different crops, all of these researches have provided scientific basis To reduce soil erosion and improve agricultural production. the Erect Stubble Height of naked oats farmland, cole farmland, grass-millet farmland is 10cm,20cm,30cm,40cm, the residue coverage is 30%, under pure wind flow condition ,The experimentation results showed that the wind-blown mass of the different crops increase with the increase of wind speed in accordance with index law, the wind-blown mass of cole farmland, naked oats farmland, grass-millet farmland and erect stubble height according to linear law, the wind-blown mass and erect stubble height of naked oats and grass-millet farmland do not comply with any function. It can effectively reduce wind erosion when erect stubble height of naked oats farmland, cole farmland, grass-millet farmland is no more than 30cm, 20cm to 30cm and 20cm respectively. When the height of erect stubble and residue coverage are certain, the wind-blown mass of naked oats farmland > cole farmland > grass-millet farmland, the anti-wind erosion capability is grass-millet farmland > cole farmland > naked oats farmland. Under wind-sand flow condition, the wind-blown mass of the different crops will increase according to the power function law with the increase of wind speed, the wind-blown mass of the different crops and erect stubble height accord with logarithm law. The wind-blown mass of wind-sand flow is 17.12~118.86 times pure wind flow, wind-sand flow on the surface of the soil damage is far greater than pure wind flow.