According to the inquiry of the farmer. It takes 120.8 days for Shuoyuan 165 maize seeds to mature, which is 0. 1 day later than the control. The suitable sowing date is from late April to early May, and the density is 5500 plants/mu. This variety meets the standard of maize variety approval in Inner Mongolia Autonomous Region and has passed the approval. Suitable for Inner Mongolia Autonomous Region ≥ 10℃, with active accumulated temperature above 2 150℃.