Study on the suitable area of ratoon rice in China under climate change

Ratoon rice is a special cultivation system developed based on the regenerative capacity of rice axillary buds. Its core mechanism lies in regulating the regeneration potential of stubble axillary buds through agronomic practices. After harvesting the main-season rice, dormant buds are induced to sprout and form secondary tillers, which eventually develop into effective panicles, thereby achieving “one planting with two harvests.” In this study, 167 occurrence records of ratoon rice, nine environmental variables, and three future climate scenarios proposed in CMIP6 (SSP1-2.6, SSP2-4.5, and SSP5-8.5) were used to predict the suitable cultivation area of ratoon rice in China using the MaxEnt model.