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川红花是中国传统的活血化瘀中药材。该研究以四川省为例,结合川红花生长的生态环境指标,基于TM影像、数字高程模型(DEM)、气象、土壤等数据,利用遥感和GIS(地理信息系统)技术提取林地、草地、海拔、气温、降水、土壤等影响因子,从而对川产道地药材川红花的适宜性空间分布进行研究,并结合野外实测进行验证。结果表明:川红花资源主要集中在四川东部和东北部地区,适宜性区域约为6 277.14 km2,其中,达州市的适宜区的面积达1 143.45 km2,占全省适宜区的18.22%。从各区县看,达川区适宜性区域达到507.15 km2,占全县土地面积的17.9%。另外,纳溪区、青神县、江安县等12个区县的适宜区面积超过100 km2,且占各县土地面积的10%以上。通过遥感和GIS技术分析的结果与川红花的实际分布地区基本相符,说明利用3S技术研究川红花的适宜性分布是可行的,可以为中草药资源的监测保护以及合理开发提供科学依据。
Chuan Safflower is a traditional Chinese medicine for promoting blood circulation and removing blood stasis. Taking Sichuan Province as an example, this study combined the eco-environmental indicators of the growth of Chuanhus saffron, based on TM images, digital elevation model (DEM), meteorological data and soil data, extracted remote sensing and GIS (Geographic Information System) Altitude, temperature, precipitation, soil and other influencing factors, so as to study the spatial distribution of suitability of safflower sakura in Sichuan Province and verify the results with field measurements. The results showed that the resources of Chuanhushu were mainly concentrated in the eastern and northeastern regions of Sichuan. The suitable area was about 6 277.14 km 2, of which the suitable area of Dazhou reached 1 143.45 km 2, accounting for 18.22% of the suitable area of the province. Judging from the districts and counties, the suitable area of Dachuan reached 507.15 km2, accounting for 17.9% of the total land area of the whole county. In addition, 12 districts and counties in Naxi, Qingxian and Jiang’an count more than 100 km2 of suitable area, accounting for more than 10% of the total land area of each county. The result of remote sensing and GIS technology is basically consistent with the actual distribution area of Chuanhus saffron, indicating that it is feasible to study the suitability distribution of Chuanxionghua by using 3S technology, which can provide a scientific basis for the monitoring, protection and rational development of Chinese herbal medicine resources.