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基于MaxEnt和ArcGIS的定西市蒙古黄芪适宜性区划研究
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| 篇名： | 基于MaxEnt和ArcGIS的定西市蒙古黄芪适宜性区划研究 |
| TITLE： | Study on Suitability Zoning of Astragalus membranaceus var. mongholicus in Dingxi City Based on MaxEnt and ArcGIS |
| 摘要： | 目的：对定西市蒙古黄芪进行生态适宜性区划研究。方法：以定西市1001批蒙古黄芪为考察样本（以每个有蒙古黄芪栽培的自然村为采集单位进行样本采集），从定西市经济作物技术推广站中获取其经、纬度信息，并从《中药资源空间信息网格数据库》中获取其55项环境生态因子（包括气候、地形、土壤等）信息。结合经、纬度信息和环境生态因子信息，以75％样本为训练集建立最大熵模型（MaxEnt模型），筛选出主要生态因子，并以另外25％样本为验证集进行模型验证。随后，应用地理信息系统（Arc-GIS）对蒙古黄芪的适宜生长区进行划分。结果：建立的MaxEnt模型预测效果良好（训练集和验证集样本受试者工作特征曲线下面积分别为0.970、0.968）。共筛选出海拔、降水量、温度等8个主要生态因子（贡献率总和为98.90％）；结合分析系统发现，海拔在1800～2650m、4月降水量在25～50mm、最冷月最低温在－16～－8℃、最湿月降水量在95～110mm、温度季节性变化标准差在70～80、12月平均气温在－6～－3℃、10月降水量在30～50mm、12月降水量在0～10mm为定西市蒙古黄芪适宜生长的环境参数。结合ArcGIS分析结果，在定西市境内蒙古黄芪普遍适宜生长；在临洮县西北部、安定区北部、通渭县南部、陇西县南部少量地区、岷县南部少量地区以及渭源县、漳县、岷县交界处不适宜生长。结论：本研究建立的模型分析结果与实际考察符合，可为定西市蒙古黄芪的种植区域规划提供参考。 |
| ABSTRACT： | OBJECTIVE：To study the ecological suitability zoning of Astragalus membranaceus var. mongholicus in Dingxi city. METHODS ：Taking 1 001 batches of A. membranaceus var. mongholicus in Dingxi city as the investigation samples （each natural village with A. membranaceus var. mongholicus cultivation as the collection unit ），the longitude and latitude information of them were obtained from Dingxi economic crop technology promotion station ，and 55 environmental ecological factors （including climate，terrain，soil，etc.）were obtained from the Grid Database of Spatial Information of TCM Resources . Combined with the information of longitude ，latitude and environmental ecological factors ，the maximum entropy model （MaxEnt model ） was established with 75％ samples as the training set ，and the main ecological factors were screened out ，and 25％ samples were set as the validation set for model validation. Then the suitable growing areas of A. membranaceus var. mongholicus were divided by using ArcGIS. RESULTS ：Established MaxEnt model had good prediction （the area under the working characteristic curve of subjects in training set and verification set was 0.970 and 0.968）. Eight main ecological factors ，such as altitude ，precipitation and temperature ， were selected （the total contribution rate was 98.90％）. The comprehensive analysis found that the altitude was 1 800 to 2 650 m， the average precipitation in April was 25 to 50 mm，the lowest temperature of the coldest month was －16 to －8 ℃，the wettest monthly precipitation was 95 to 110 mm，and the seasonal variation of temperature was 70 to 80，the average temperature in December was －6 to －3 ℃ ，the average precipitation in October was 30 to 50 mm，and the average precipitation in December was 0 to 10 mm，which was the suitable environmental parameter for the growth of A. membranaceus var. mongholicus in Dingxi city. Based the results of ArcGIS analysis ，in Dingxi city ，A. membranaceus var. mongholicus was generally suitable for growth ；in the northwest of Lintao county ，the north of Anding district ，the south of Tongwei county ，a small area in the south of Longxi county and the south of Minxian county ，the border between Weiyuan county ，Zhangxian county and Minxian county ，A membranaceus var. mongholicus was not suitable for growth. CONCLUSIONS： Ther results of established model is in E-mail：961308817@qq.com line with the actual investigation ， can provide reference for the planting regional planning of A. membranaceus var. mongholicus in Dingxi city. |
| 期刊： | 2020年第31卷第03期 |
| 作者： | 王莉，韦翡翡，成希，赵文龙，晋玲 |
| AUTHORS： | WANG Li，WEI Feifei，CHENG Xi，ZHAO Wenlong ，JIN Ling |
| 关键字： | 蒙古黄芪；定西市；适宜性区划；地理信息系统 |
| KEYWORDS： | Astragalus membranaceus var.mongholicus ；Dingxi city ；Suitability zoning ；Geographic information system |
| 阅读数： | 354 次 |
| 本月下载数： | 5 次 |
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