Experiments on the Influence of Corn Straw Morphological Combinations on Timely No-Tillage Sowing Soil Temperature and Moisture in Cold Regions

After corn mechanical harvest in autumn the cold region of northeast China, straw mulching leads to high soil topsoil water content and slow ground temperature rise spring sowing season, which may result a no-tillage planter being unable operate time, delayed date, poor seedling emergence quality, low grain yield. Based on problems moisture season conservation tillage with mulching, an experimental study timely was carried out from perspective combination optimization attribute parameters treatment. Taking four treatment attributes as factors, including length, shape, form (surface covering, inter-ridge mixed covering), stubble height after 2019 during 2020 evaluation indexes, field plot experiment by factors three levels orthogonal test method. The results showed that all had significant influence (p < 0.05). It is helpful reduce increase increasing length stalk, breaking stalk moderately, covering between ridges, stalk. Design-Expert software used optimize parameters. when 150 mm, shape half-cut (dividing into two parts evenly along axis), mulch 600 22~24% higher than 8 °C sowing. 2021, stalks were treated year according parameter combination. measured be 24.4% 8.2 °C, respectively, 2022, proved this credible. provide technical reference for implementation surface China.