在美国中部平原，向日葵是一种适宜轮作的经济作物，然而，其收获后的休闲期如果残茬盖度较低，很容易产生风蚀。通过对向日葵残茬盖度（残茬株高、密度、直径）对残茬内及残茬冠层上方风速的影响测定，残茬覆盖地块与裸地相比较，研究摩擦风速与侵蚀速率的变化，得出结论为：摩擦风速与风速及残茬盖度的平方呈线性关系，与裸地相比，向日葵残茬可减少侵蚀８８％～１００％。 Sunflower is a cash crop suitable for rotation in the Central Plains of the United States. However, wind erosion can easily occur if the residual stubble is low during post-harvest leisure. The effects of sunflower stubble coverage (stubble height, density and diameter) on the wind speed above the stubble and residual stubble were studied. The comparison of stubble coverage with bare land shows that the friction wind speed and erosion rate The results show that the frictional wind speed is linear with the square of the wind speed and stubble coverage, and the sunflower stub can reduce the erosion by 88% -100% compared with bare land.