In-situ Testing Study On Wind-protecting Effect Of Intercropping Stripes Stubble Cropland

Strip intercropping stubble to prevent wind erosion is a simple and effective model of farmland protection. It is very important to research on crop stubble on the adjacent traditional farming with the protective effect and mechanism of the development of effective mitigation measures.For this experiment, we chose the typical test zone (Wuchuan Dry-Farming Experimental Station of Inner Mongolia Academy of Agricultural Sciences) to do the field wind tunnel tests, and research on anti-wind effects for the use of strip intercropping of farmland planted with conservation tillage. We analyzed the conservation tillage to reduce the impact of the wind speed range by changing the central wind speed, as well as the height and bandwidth of the stubble. The experimental results show that: crop stubble can form a protection zone adjacent to effectively reduce the wind speed with traditional farming, but as the wind speed increased, the reduction function of the conservation tillage to reduce the magnitude of the wind speed has been reduced. It also shows that from the vertical direction along the surface, the more close to the surface, the greater of the rate to reduce the wind speed. Even if leaving 10cm crop stubble of the conservation tillage can also play a protective role, but less protection make sense. Under different experiment treatments, different bandwidth requirements for crop stubble height also vary. When the intercropping bandwidth is 100cm, leaving 20cm stubble can basically ensure that traditional farming in the whole band has a good protective effect. While the bandwidth is 150cm or 200cm, it is better to leave 25cm. But, when the bandwidth is 250cm or 300cm, the 25cm stubble can only protect most of the traditional farming area. The increase in bandwidth conservation tillage strengthens protection scope, but the lowest wind speed reduction rate of traditional farming has also been decreasing. In order to enable conservation tillage play with the ideal protective role, it is better to select 25cm crop stubble and the bandwidth is 200cm.