Ecological zoning and quality zoning of Chinese sorghum under the background of climate change

Abstract

The original sorghum division was completed in the 1980s. Since the 21st century, with the climate warming and the planting belt moving to the north, it is urgent to compile new sorghum divisions to adapt to the needs of the new era to prevent the adaptive risks brought by cross-regional planting of varieties.In view of the above problems, 20 representative varieties of various maturity periods cultivated by major national sorghum breeding units in recent years were selected in this experiment, and 59 ecological zones with different ecological characteristics were selected in the country. According to the characteristics of different pilot meteorological factors and variety trait performance characteristics, sorghum ecological zoning and quality zoning were conducted.The results show that 5 primary zones and 14 secondary ecological zones can be divided,Northwest spring sowing area, North China spring sowing area, northeast spring sowing area, southern area and northern spring and summer sowing area are the first-class ecological areas.Liaonian3 and Liaonuo11, Jinnuo3 and Liaoza19,Fengza4 and Liaoza37 are the dominant species to adapt to different ecological zones.North China spring sowing area and northeast spring sowing area for high starch, high capacity and heavy producing area, northeast spring sowing area and southern area for high tannin producing area.