摘要
针对西北寒旱区马铃薯全膜覆盖种行覆土栽培农艺要求,研制一种跨越式膜上对行覆土装置.解析跨越式提土装置和侧向对行覆土装置作业机理,确定了各个部件的核心作业参数.运用离散单元法(DEM)进行了对行覆土仿真试验,结合Box-Behnken试验设计原理,采用三因素三水平响应曲面法,建立了覆土宽度和覆土厚度的回归模型,优化得到跨越式膜上对行覆土装置的最优作业参数组合为螺旋输土器转速135 r·min-1,覆土器开口长度100 mm,覆土器离地高度为233 mm.田间试验表明,设计的跨越式对行覆土装置满足马铃薯种植农艺要求,马铃薯幼苗自然出苗率达到92.5％,同时烧苗率为7％.
Abstract
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％.
基金项目
国家自然科学基金(52165028)
国家自然科学基金(51765004)
甘肃省科技重大专项(22ZD6NA046)
甘肃省教育厅产业支撑计划(2022CYZC-42)
NETL
NSTL
万方数据