河八王在我国的潜在分布区预测及适应性评价  

Potential Distribution Area Prediction and Adaptability Evaluation of Narenga porphyrocoma in China

作　　者：杜卫红 易自力[1] 廖剑锋 薛帅[1] 杨塞[1] 肖亮[1] 黄红梅[1] DU Wei-hong;YI Zi-li;LIAO Jian-feng;XUE Shuai;YANG Sai;XIAO Liang;HUANG Hong-mei(College of Bioscience and Biotechnology,Hunan Agricultural University,Changsha 410128,PRC)

机构地区：[1]湖南农业大学生物科学技术学院,湖南长沙410128

出　　处：《湖南农业科学》2021年第5期38-42,47,共6页Hunan Agricultural Sciences

基　　金：湖南省重点领域研发计划项目(2019NK2011、2019NK2021)。

摘　　要：为了明确河八王当代分布格局以及影响其生长和分布的环境变量,通过查询已有馆藏标本信息并结合实地考察,获得80个河八王现代分布点信息,运用MaxEnt模型筛选出与河八王生长相关的主导环境变量,定量分析限制河八王生长和分布的气候和地形因子,最终得到河八王在当前气候条件下的潜在适宜分布区。结果表明:(1)MaxEnt模型预测河八王潜在分布AUC值为0.968,表明其预测结果精确;(2)最适宜河八王生长的环境为最湿月降雨量范围在220-430 mm,最干月降雨量范围在22-202 mm,年温变化范围在23-30.5℃,6月太阳辐射低于21 000 kJ/(m^(2)·d),3月太阳辐射低于12 500 kJ/(m^(2)·d),海拔低于600 m时最适宜河八王的生长和分布,其中海拔是地形限制因子,降雨、温度、太阳辐射气候限制因子;(3)河八王的现代适生面积为1 658 633.480 km^(2),主要分布在我国华中的湘鄂赣皖地区,华南的粤桂地区,华东的江浙闽地区,西南的云贵蜀渝地区。以上研究结果可为河八王的人工引种栽培以及种质资源保存提供参考和理论依据。In order to clarify the current distribution pattern of Narenga porphyrocoma and the environmental variables affecting its growth and distribution,80 modern distribution points of Narenga porphyrocoma were obtained by querying the existing specimen information and combining with field investigation.The MaxEnt model was used to screen out the dominant environmental variables related to the growth of Narenga porphyrocoma,and to quantitatively analyze the climatic and topographic factors limiting the growth and distribution of Narenga porphyrocoma,finally,the potential suitable distribution area of Narenga porphyrocoma under the current climate conditions was obtained.The results show that:(1)the AUC value of potential distribution of Narenga porphyrocoma predicted by MaxEnt model is 0.968,which indicates that the prediction result is accurate;(2)the results show that the most suitable environment for the growth of Narenga porphyrocoma is that the rainfall range of the wettest month is 220-430 mm,the rainfall range of the driest month is 22-202 mm,the annual temperature range is 23-30.5℃,the solar radiation in June is less than 21000 kJ/(m^(2)·d),the solar radiation in March is less than 12500 kJ/(m^(2)·d),and the altitude is less than 600 m;(3)the modern suitable area of Narenga porphyrocoma is 1658633.480 km^(2),mainly distributed in Hunan,Hubei,Jiangxi and Anhui in Central China,Guangdong and Guangxi in South China,Jiangsu,Zhejiang and Fujian in East China,and Yunnan,Guizhou,Sichuan and Chongqing in Southwest China.The above results can provide reference and theoretical basis for the artificial introduction and cultivation of Narenga porphyrocoma and the conservation of germplasm resources.

关 键 词：河八王 MaxEnt模型 环境限制因子 潜在适生区 

分 类 号：S688[农业科学—观赏园艺]