According to the agronomic requirements of potato cultivation with full film mulching and soil covering on film in the cold and dry regions of Northwest China,a leaping-over type soil covering device was designed.The dis-crete element method(DEM)was used to conduct soil cover simulation experiments.Based on the Box-Behnken ex-perimental design principle,a regression model for soil cover width and soil cover thickness was established using the three factor and three level response surface method.The optimal operating parameter combination for the leaping-o-ver soil covering device was optimized as follows:the rotational speed of the screw conveyor was 135 r·min-1,the o-pening length of the soil cover was 100 mm,and the height of the soil cover from the ground was 233 mm.Field ex-periments have shown that the natural seedling emergence rate of potato reached 92.5％,and the seedling burning rate was 7％.
potatosoil covering on the seeding rowlateral soil transportwhole film mulching
NETL
NSTL
万方数据
