| Cite this article: | 何钊全,尚雪,张铜会.基于GIS耦合地理探测器模型的陕北红枣生态适宜性区划与驱动机理分析[J].灌溉排水学报,2022,(12):-. |
| HE Zhaoquan,SHANG Xue,ZHANG Tonghui.基于GIS耦合地理探测器模型的陕北红枣生态适宜性区划与驱动机理分析[J].灌溉排水学报,2022,(12):-. |
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| Ecological suitability regionalization and driving mechanism of jujube based on GIS coupled geographical detector model in Northern Shaanxi |
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HE Zhaoquan1,2,3,2,4, SHANG Xue5,2,3,2,4, ZHANG Tonghui6
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1.Shaanxi key laboratory of Chinese Jujube,Yan'2.'3.an University,Yan'4.an;5.School of Life Sciences,Yan'6.Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences
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| Abstract: |
| 【Objective】Jujube is the dominant economic tree in northern Shaanxi, so it is of practical significance for the regulation of regional ecosystem pattern by clarifying the characteristics of ecological suitability zoning of jujube and the response process to environmental factors. 【Method】The ecological suitability zoning of jujube was analyzed by GIS, and the driving mechanism of environmental factors was determined through geographical detector model in our study. 【Result】 (1) The zoning levels of ecological suitability of jujube decreased progressively from the east and south of northern Shaanxi to the northwest. The optimal and sub-suitable areas were concentrated in Fu County; generally suitable regions with large planting area were mainly distributed in the districts and counties along the west region of the Yellow River in northern Shaanxi. (2) Climatic factors and topographic factors had a greater influence on the ecological suitability of jujube, and had significant difference, showing an interaction effect of mutual enhancement or nonlinear enhancement. (3) Annual precipitation, elevation and annual accumulated temperature (≥10 ℃) were the main driving factors. The ecological suitability index of jujube was negatively correlated with annual precipitation and annual accumulated temperature, and was positively correlated with elevation. (4) Annual precipitation, elevation, and annual accumulated temperature explained 22.0%, 15.0% and 11.0% of the ecological suitability index of jujube, and the comprehensive interpretation rate reached 78.0%. 【Conclusion】The zoning levels of ecological suitability of jujube decreased significantly from southeast to northwest in Northern Shaanxi, and the development of regional jujube specialty industry and forest-dominated ecosystem pattern were regulated mainly by annual precipitation, elevation, annual accumulated temperature, and their interaction. |
| Key words: GIS; ecological suitability; geographical detector model; driving mechanism; jujube of Northern Shaanxi |
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