基于MaxEnt模型的四川省一季稻种植适宜性区划OA

To provide a basis for the development layout and structural adjustment of the rice industry in Sichuan Province,the suitabil-ity distribution of single cropping rice(Oryza sativa L.)production was simulated using the maximum entropy model(MaxEnt)based on geographic information and relevant environmental variables of single cropping rice production in Sichuan Province,the main eco-logical factors affecting its production were identified,and the model accuracy with ROC curves was verified.The results showed that the model evaluation accuracy AUC was 0.931,indicating high simulation accuracy and reliable results.The dominant meteorological factors affecting single cropping rice production in Sichuan Province included minimum temperature in June,average temperature in September,annual average temperature,precipitation in September,annual precipitation,precipitation in July,and annual sunshine hours,and the dominant topographic factors were altitude and slope.Single cropping rice production in Sichuan Province was mainly distributed in the Sichuan Basin and Panxi region.The areas of marginally suitable,suitable,and most suitable regions were 90 268.84 km2,42 507.84 km2,and 2.14 km2,respectively.The most suitable and suitable regions were mainly located in the west-ern,southeastern,and northeastern parts of the Sichuan Basin,as well as the Jinsha River and Anning River Basins in the Panxi re-gion.The unsuitable region covered 354 021.06 km2,primarily distributed in the Garzê Tibetan Autonomous Prefecture and Aba Tibet-an and Qiang Autonomous Prefecture on the Northwest Sichuan Plateau,as well as parts of the Southwest Sichuan Mountainous Areas and the mountainous areas surrounding the basin.The zoning results of single cropping rice production suitability were consistent with the distribution of per-unit yield.