1. Under the same conditions, the area with high accumulated temperature in Youyang flower field has better rice maturity and higher first-class rice rate than the area with low accumulated temperature, which requires a temperature of 25-30℃.

2. Head milled rice of high quality rice in Youyang flower field fluctuates with the change of soil type. Soil conditions have a great influence on the mature quality and yield of rice, and the soil quality is black soil.