Development Status and Trend of Rice and Wheat Straw Returning Technology

Soil organic matter has positive impacts on its physical，chemical and biological properties，and the level of its content is a main symbol of soil fertility.Straw returning to field is the most basic way to restore and maintain the content.Current status of development and research of straw returning technology were described.Induction and analysis in detail were made in accordance with the straw depth，from which development process and direction of straw returning machine were teased out.Some opinions and suggestions for the future research of straw returning technology were put forward.