京大戟生态适宜性区划研究

Study on Ecological Suitability of Euphorbiae Pekinensis Rupr.

目的通过研究京大戟的生态适宜性,以保护京大戟的野生资源,并为人工规范化栽培提供依据。方法收集347个京大戟分布位置和55个生态因子,导入最大熵(MaxEnt)模型进行运算,最后结合地理信息系统(GIS)确定适合京大戟生长的区域。结果影响京大戟生态适宜性的主要生态因子是年均降水量、年平均气温、11月降水量、土壤类型、最暖月最高温及植被类型。京大戟在我国具有广泛的适宜生长区域,最适宜的地区主要集中在北京市、河北省东部、山东省中部及沿海地区、山西省中南部、陕西省中南部、甘肃省西南部、云南省东南部、河南省西部、湖北省北部、安徽省东部、广西壮族自治区东北部等。结论本研究预测的适宜京大戟生长分布区域可靠,可为京大戟野生资源提供保障,并为其科学种植提供指导。

Objective To protect the wild resources of Euphorbiae Pekinensis Rupr. through study on ecological suitability distribution of Euphorbiae Pekinensis Rupr.;To provide an evidence for standardized planting of Euphorbiae Pekinensis Rupr.. Methods Totally 347 locations and 55 ecological factors of Euphorbiae Pekinensis Rupr. were collected, and the MaxEnt model for calculation. Finally, the area suitable for the growth of Euphorbiae Pekinensis Rupr. was determined combining with geographic information system(GIS). Results The main ecological factors affecting the ecological suitability of Euphorbiae Pekinensis Rupr. were average annual precipitation, average annual temperature, monthly precipitation in November, soil type, highest temperature of the warmest month, and vegetation type. Euphorbiae Pekinensis Rupr. had a wide range of potential growth areas in China. The most suitable areas were mainly concentrated in Beijing, eastern Hebei Province, central and coastal areas of Shandong Province, central and southern Shanxi Province, central and southern Shaanxi Province, southwestern Gansu Province, southeastern Yunnan Province, western Henan Province, northern Hubei Province, eastern Anhui Province, northeastern Guangxi and other regions. Conclusion The study predicted that the suitable growth and distribution area of Euphorbiae Pekinensis Rupr. is reliable, which can provide guarantee for the wild resources of Euphorbiae Pekinensis Rupr. and offer guidance for scientific planting.