以南丹县为代表 ,估算广西单季稻区中稻不同品种在不同时期播种情况下的潜在光温生产潜力和现实光温生产潜力。结果表明 ,以 4月上中旬播种的中迟熟品种生产潜力最高 ,并且随播期推迟而降低 ;早熟种生产潜力较低 ,且播期过早产量更低 Taking Nandan County as the representative, potential photothermal potential and actual potential of photothermal production under different sowing dates for different varieties of single cropping rice in Guangxi were estimated. The results showed that the mid-late-sowing varieties planted in mid-April had the highest production potential and delayed with the sowing date. The early-maturing varieties had lower production potential and the earlier sowing date was lower