| Spatial distribution characteristics of soil organic matter in Chinese herbal medicine planting area in Longxi County |
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| DOI：10.7606/j.issn.1000-7601.2020.05.27 |
| Key Words: soil organic matter distribution characteristics Chinese herbal medicince planting area GIS influencing factors Longxi County in Gansu Province |
| Author Name | Affiliation | | GAO Shunping | Longxi County Agrotechnical Extension Center, Longxi, Gansu 748000, China | | HE Mingzhu | Northwest Institute of Eco\|Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | Bai Guangzu | Northwest Institute of Eco\|Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | Zhao Pengshan | Northwest Institute of Eco\|Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | Guan Qingxia | Longxi County Agrotechnical Extension Center, Longxi, Gansu 748000, China |
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| Abstract: |
| The spatial distribution pattern of soil organic matter level and storage in the main producing areas of traditional Chinese medicine in Longxi County was studied by collecting and analysing the datas of soil organic matter storage in 200 herbal medicine planting fields in 17 townships of Longxi County to provide scientific basis for soil management, soil testing, fertilization and healthy development of traditional Chinese medicine industry in the planting areas. The results showed that the soil organic matter density in Longxi County ranged from 27.03×103~65.87×103 kg·hm-2, and the coefficient of variation was 19.30%~51.78%, which belonged to moderate variation intensity. The different contents of soil organic matter in different villages and towns in Longxi County were due to the differences in topographic conditions. With increasing soil depth, the content of organic matter first increased then decreased. The soil organic matter density in the surface layer of 0~10 cm was the lowest (10.76×103 kg·hm-2), and the soil organic matter density in 10~30 cm was the highest (18.93×103 kg·hm-2). The soil organic matter density in the traditional Chinese medicine growing area of Longxi County was of moderate variation intensity, and its spatial distribution was affected by latitude, slope, elevation, and slope direction, especially, latitude and elevation had the greatest influence on organic matter. There was a significant correlation between soil organic matter density and precipitation, evaporation, temperature, and relative humidity, and the relationship with relative humidity and evaporation reached an extremely significant level, showing a significant negative correlation with rainfall and relative humidity, and a significant positive correlation with temperature and evaporation. |
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