Comparative experiment on the production performance of four Sorghum bicolor × S. sudanense cultivars in the Chengdu Plain

To screen for high yield and high-quality Sorghum bicolor × S. sudanense cultivars in the Chengdu Plain. Field experiment of four cultivars were conducted in the Chengdu Plain from 2018 to 2020. The phenological phase, agronomic traits, and hay grass yield were measured; only the grass yield was measured for three years, and others were measured in the first year. Seven growth indexes were comprehensively evaluated by the grey relational degree analysis method. The results showed that in terms of growth characteristics, ‘Shucao No. 1’ and ‘Jicao No. 2’ had the highest plant height. The leaf number, tiller number and leaf width of ‘JC-009’ were the highest, and ‘JC-009’ had the highest hay yield and the lowest stem/leaf ratio. The comprehensive evaluation of the four cultivars using the grey relational degree indicated that ‘JC-009’ was more suitable for planting in the Chengdu Plain.