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为了探究不同作物残茬和生物篱的防风蚀效果及距驼绒藜下风向不同距离处的风蚀规律,采用地表埋放风蚀圈的方法对研究区土壤风蚀情况进行了监测。结果表明:不同作物残茬及驼绒藜对间作秋翻裸地的保护作用明显,驼绒藜冠幅越大防护效果越好,草谷子和油菜2种残茬相比,草谷子残茬由于秸秆密集,防护效果好于油菜茬,草谷子和油菜残茬加上驼绒藜冠幅的保护,裸地中土壤风蚀量下降73.40%~88.90%;与大面积秋翻裸地相比,不同残茬和生物篱均对间作秋翻裸地有防护作用,土壤风蚀量降低率为38.57%~76.45%,其防护效果大小顺序为草谷子茬>4年驼绒藜>莜麦茬>油菜茬>2年驼绒藜>草玉米茬>油葵秆;驼绒藜下风向不同距离处的风蚀趋势为,距驼绒藜2m之内,土壤沉降量逐渐降低,3~5m土壤沉降量又逐渐增大,5~8.5m土壤沉降量又逐渐减小,距驼绒藜8.5m外开始发生风蚀,而且随距离增加土壤风蚀量逐渐增大。秋翻裸地中距4年驼绒藜1m到10m不同距离处,较大面积秋翻裸地土壤风蚀量降低率为65.84%~132.40%;距4年驼绒藜10m之外的区域还能显现驼绒藜的防护效果。
In order to study the wind erosion effect of stubble and hedgerow of different crops and the wind erosion law at different distances from the downwind direction of Ceratoides arborescens, the wind erosion of the study area was monitored by the method of embedding the wind erosion circle on the surface. The results showed that the protective effect of different crop residues and Ceratoides pigweed on the bare land of intercropping autumn was obvious. The bigger the crown width of Ceratoides arborescens, the better the protective effect. Compared with the two kinds of stubble, , And the protective effect was better than that of the stubble of rapeseed, grass millet and rape plus the crown width of camelina, the amount of soil wind erosion in the bare land decreased by 73.40% ~ 88.90%; compared with the large area of bare land, The hedgerows had protective effect on autumn and autumn, and the reduction rate of soil wind erosion was 38.57% -76.45%. The order of protection effect was gramineous stalks> Ceratoidea> 4 years> stubble> stubble> 2 years Ceratoides > Grass corn stubble> oil sunflower stalks; wind erosion trend of Celastrus elativa at different windward distances was within 2m away from Ceratoides, the settlement of soil decreased gradually, and the settlement of 3 ~ 5m soil gradually increased. The soil erosion of 5 ~ 8.5m soil The amount of subsidence decreased gradually. Wind erosion began to occur at a distance of 8.5m from Ceratoides, and the amount of wind erosion gradually increased with distance. Autumn fall nudity 4 years from Ceratoides 1m to 10m at different distances, the greater area autumn to turn bare soil erosion reduction rate of 65.84% to 132.40%; from 4 years Ceratoides 10m outside the area can also show camel hair Quinoa protective effect.