1, first, returning straw to the field is environmentally friendly and reduces air pollution;
2. Reduce surface runoff, increase rainwater infiltration and inhibit water evaporation;
3. Adjusting the ground temperature is beneficial to the reproduction and activity of microorganisms and promotes the transformation and decomposition of soil moisture;
4. Protect the soil surface, prevent soil erosion and inhibit the growth of weeds;
5. After the straw is decomposed, increase organic matter and humus to improve soil fertility;
6. Improve soil physical properties, increase aggregate structure, increase porosity and reduce soil bulk density.