广西地形对青蒿中青蒿素含量的影响

针对广西青蒿种植中适生地选择的迫切要求,在对广西31个样地155株青蒿中青蒿素含量测定的基础上,分析了青蒿素含量地理变异,不同地形条件下青蒿素含量变异,海拔高度、坡度、坡向等地形因子对青蒿素含量的影响,不同区域内青蒿素含量变异分析,并应用GIS技术开展了基于地形因子的青蒿种植区划分析.得到如下结果和结论:①各样地间的青蒿素含量存在显著性差异(P=0.000<0.05);②海拔高度和坡度是影响青蒿素含量变化的主要地形因子,生长在海拔较高、坡度较大的丘陵、山地区域内的青蒿,青蒿素含量高于生长在海拔较低、坡度较小的平原区域内的(P=0.000<0.05);③桂西南地区内的青蒿素含量最高,桂东南平原区域内的青蒿素含量最低,二者与其他区域的青蒿素含量差异显著(P=0.000<0.05);④青蒿素含量在(0.76%～0.93%)的为最适宜区,主要包括桂东北和西南地区的阳朔、都安、大化、苹果、马山、武鸣、隆安、南宁和崇左等县市.青蒿素含量在(0.61%～0.76%)的为较适宜区域.青蒿素含量在(0.47%～0.61%)的为适宜区.青蒿素含量在(0 32%～0.47%)的为不适宜区,主要包括北海市、钦州市、贵港市、贺州市、梧州市和岑溪市的部分地区.⑤桂北地区地形复杂"小地形"、"小气候"特征明显,从小尺度范围内研究青蒿的生态适宜性,更能得到较显著的效果.

Analysis of the effect of topographical conditions on the artemisinin content in sweet wormwood herb in Guangxi, China

With the increasing demands of artemisinin, artificial planting of Sweet Wormwood Herb is necessary. These are close relationships between topographical conditions and artemisinin content in Sweet Wormwood Herb. In order to explore the spatial variability of artemisinin content in Sweet Wormwood Herb and select most suitable planting regions, 155 samples of Sweet Wormwood Herb are collected from 31 sites in Guangxi, one of the main habitats of Sweet Wormwood Herb in China. The artemisinin content is analyzed precisely in the laboratory. Based on these sample data and GIS technology, the spatial relationships between topographical conditions and the artemisinin content in Sweet Wormwood Herb in Guangxi, China are examined statistically and spatially. First, there is a significant difference in artemisinin content in different sample sites statistically (P=0.000<0.05). Second, elevation and slope are the key terrain factors affecting the artmisinin content. The artmisinin content sampled from the mountainous regions is evidently higher than that from plain areas (P=0.000<0.05). Third, in southwest low-mountain Guangxi, the artmisinin content in herb sample is the highest, and in the southeast plain areas it is the lowest. It is also observed that artmisinin content reduces along with the increase of elevation, but increases along with the increase of slope. Forth, according to the artmisinin content in samples, regional suitability for artificial planning of Artemisia annua L. can be classified as most suitable, where the artmisinin content is between 0.76% and 0.93%, more suitable (0.61%-0.76%), suitable (0.47%-0.61%) and unsuitable (0.32%-0.47%). The northeast and southwest Guangxi, including the mountainous counties of Yangshuo, Yangshuo, Duan, Dahua, Pingguo, Mashan, Mingwu, Duan, Nanning and Chongzuo, are the most suitable. The most part of prefecture regions, such as Beihai, Qinzhou, Guigang, Hezhou, Wuzhou and Cenxi, are classified as unsuitable. Fifth, the topographical effect is complex in the north part of Guangxi, where the microclimate and micro-terrain is clearly presented. The authors believe that the ecological suitability research at small scale will be effective in.