红花龙胆的生态适宜性研究

Study on Ecological Suitability of Gentiana rhodantha Franch

以红花龙胆为试材,拟通过收集红花龙胆的分布信息,结合生态因子,应用最大熵模型MaxEnt研究影响红花龙胆适宜分布的主要生态因子,并预测红花龙胆在中国的潜在适生区,以期为红花龙胆种质资源的筛选、人工栽培和药材质量评价的进一步研究提供参考依据。结果表明:根据MaxEnt模型预测的AUC值均大于0.9,预测效果极好。生态因子在红花龙胆生长适宜度中所占权重表明,年均降雨量、最冷月最低温、海拔、最冷季度降水量的总贡献率为86.8%。单因子建模分析结果表明,红花龙胆最适宜生长在年均降雨量800~1300 mm、最冷月最低温-3~4℃、海拔1000~2800 m及最冷季度降水量60~95 mm的环境中。适宜区划研究表明,红花龙胆最适生长区为云南北部、四川西部、重庆南部、广西壮族自治区的西部以及贵州省大部分地区。

Taking Gentiana rhodantha Franch as test material,the distribution information of Gentiana rhodantha Franch was in tends to collect,combined with ecological factors,applied the maximum entropy model(MaxEnt)to study the main ecological factors affecting the suitable distribution of Gentiana rhodantha Franch,and predicted the potential suitable areas of Gentiana rhodantha Franch in China,in order to provide reference for the further research on the screening of germplasm resources,artificial cultivation and quality evaluation of Gentiana rhodantha Franch.The results showed that the AUC predicted by MaxEnt model was greater than 0.9,and the prediction effect was excellent.The weight of ecological factors in the growth suitability of Gentiana rhodantha Franch showed that the total contribution rate of annual rainfall,the coldest month,the lowest temperature,altitude and the coldest quarter precipitation was 86.8%.The results of single factor modeling analysis showed that the most suitable growth environment for Gentiana rhodantha Franch was in the environment of annual rainfall of 800-1300 mm,the lowest temperature of-3-4℃in the coldest month,altitude of 1000-2800 m and precipitation of 60-95 mm in the coldest quarter.The study of suitable zoning showed that the most suitable growth areas of Gentiana rhodantha Franch are northern Yunnan,western Sichuan,southern Chongqing,western Guangxi Zhuang Autonomous Region and most areas of Guizhou Province.