The researchers studied how different planting densities affect the growth and yield of a new maize cultivar called Xiangnongyu No.13 in Changsha. They found that the highest yield was achieved with a planting density of 60,000 plants per hectare. As the density increased, the ears of maize became shorter and the number of kernels per row decreased. The leaf area index increased with higher density, but the SPAD value remained constant. When the density exceeded 52,500 plants per hectare, the lodging percentage of the maize cultivar was over 17%. To maximize yield, the ideal planting density for Xiangnongyu No.13 in Changsha is 60,000 plants per hectare, but measures are needed to improve lodging tolerance.