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应用最大熵模型MaxEnt和地理信息系统ArcGIS,预测了合欢在我国的潜在适生区及其适生等级,为明确合欢在中国的潜在分布区和适宜性,及开展合欢种植区划和规范化栽培提供指导。结果表明:合欢潜在分布区主要位于华中、华南、华东和西南部分地区,主要适生省份为贵州、广西、广东、湖南、湖北、福建、江西、浙江、安徽(适生指数>0.7);刀切法测试表明,最暖季降水量(模拟贡献率26.3%)、7月降雨量(25.2%)、年均温(13.5%)、最干季平均温(11.6%)、1月平均气温(10.8%)是影响合欢潜在分布的最主要5个环境因子。合欢最适生长地区主要集中在华中、华东2个地区。
Applying maximum entropy model MaxEnt and geographic information system ArcGIS to predict the potential fitness area of Acacia in our country and its adaptability level, provide guidance for clarifying the potential distribution area and suitability of Acacia in China, and carrying out Acacia planting zoning and standardization cultivation . The results showed that the potential distribution area of Acacia mainly lies in the central part of Huazhong, South China, East China and Southwest China. The main suitable provinces are Guizhou, Guangxi, Guangdong, Hunan, Hubei, Fujian, Jiangxi, Zhejiang and Anhui According to the test of cut method, the precipitation in the warmest season (simulated contribution rate 26.3%), rainfall in July (25.2%), annual average temperature (13.5%), average temperature in the driest season (11.6%), 10.8%) are the most important environmental factors affecting the potential distribution of Acacia. Acacia growth areas are mainly concentrated in central China, East China 2 areas.