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从国家层次和年尺度阐明影响我国单季稻种植区分布的主导气候因子,揭示我国单季稻种植区的潜在分布及其气候适宜性,可为我国优化单季稻生产布局、改进种植制度和引种提供科学依据.本文从国家层次和年尺度选取影响我国单季稻分布的潜在气候因子,利用其地理分布信息,结合最大熵模型和ArcGIS的空间分析功能,阐明影响我国单季稻分布的主导气候因子并构建我国单季稻分布与气候的关系模型.结果表明:影响我国单季稻潜在种植区分布的主导气候因子是年降水量、湿润指数和稳定通过18℃日数,它们对单季稻分布的累积贡献率达到了潜在气候因子的94.5%;基于主导气候因子和单季稻种植点分布的地理信息,结合最大熵模型构建的我国单季稻种植区分布与气候的关系模型能够很好地模拟我国单季稻种植区的潜在分布.根据待预测区单季稻的存在概率,明确了我国单季稻种植区潜在分布的气候低、中、高适宜区和气候不适宜区,并分析了各气候适宜区的气候特征.
From the national level and the annual scale, the dominant climatic factors affecting the distribution of single-season rice planting areas in China are revealed to reveal the potential distribution and climate suitability of single-season rice planting areas in China, which can provide scientific basis for optimizing the planting layout and introduction of single-cropping rice in our country. From the national level and the annual scale, the potential climatic factors that affect the distribution of single-cropping rice in China are selected. Based on the geographical distribution information, combined with the maximum entropy model and the spatial analysis function of ArcGIS, the dominant climatic factors affecting the distribution of single-cropping rice in China are constructed and the distribution of single- The results showed that the dominant climatic factors affecting the distribution of potential cropping areas of single cropping rice in China were annual precipitation, wetting index and the number of stable days passing through 18 ℃. The cumulative contribution rates to the distribution of single cropping rice reached 94.5% of the potential climatic factors. Based on the dominant Climatic factors and the geographical information of the single cropping rice planting sites, the model of the relationship between the distribution of single cropping rice and climate in China based on the maximum entropy model can well simulate the potential distribution of single cropping rice in China.According to the existence probability of single cropping rice, It’s Low potential distribution of national climate single cropping of rice-growing areas, in high suitable area and unsuitable climatic zones, and analyzes the characteristics of each climate suitable climate zones.