| 克拉玛依市玛依湖区土壤有机质空间异质性分析 |
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| 引用本文： | 尚白军,郑博文,周智彬,王利界.克拉玛依市玛依湖区土壤有机质空间异质性分析[J].华南农业大学学报,2021,42(1):72-81. |
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| 作者姓名： | 尚白军 郑博文 周智彬 王利界 |
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| 作者单位： | 中国科学院新疆生态与地理研究所/国家荒漠?绿洲生态建设工程技术研究中心,新疆乌鲁木齐830011;中国科学院新疆生态与地理研究所莫索湾沙漠研究站,新疆石河子832000;中国科学院新疆生态与地理研究所塔克拉玛干沙漠研究站,新疆库尔勒841000;中国科学院大学,北京100049;中国科学院新疆生态与地理研究所/国家荒漠?绿洲生态建设工程技术研究中心,新疆乌鲁木齐830011;中国科学院新疆生态与地理研究所莫索湾沙漠研究站,新疆石河子832000;中国科学院新疆生态与地理研究所塔克拉玛干沙漠研究站,新疆库尔勒841000;泰州市高港区政府办公室,江苏泰州225321 |
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| 基金项目： | 中国科学院新疆生态与地理研究所“一三五”规划项目“荒漠和绿洲生态保育及生态屏障建设技术”；中国科学院战略先导科技专项(XDA23060203) |
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| 摘 要： | 目的 研究克拉玛依市东部生态屏障的水源地玛依湖区土壤有机质的空间分布规律, 为湖区的生态环境保护提供科学依据和数据支撑。方法 以玛依湖区为研究对象，通过野外采样和室内分析，利用趋势分析法、反距离权重插值法、空间自相关法和半变异函数法分析玛依湖区不同土层深度土壤有机质的空间分布规律。结果 趋势法分析表明，玛依湖区土壤有机质含量在0~20、20~40、40~60和60~80 cm土层的变化速率存在差异，整体趋势为土壤有机质含量南北方向呈增加趋势、东西方向呈减少趋势。反距离权重插值法(IDW)研究表明，玛依湖区不同土层土壤有机质水平分布差异较大，局部地区土壤有机质含量存在明显的垂直分布特征，土壤有机质含量变化趋势同趋势法分析结果高度一致，整体表现为土壤有机质含量南北方向呈增加趋势、东西方向呈减少趋势。空间自相关法研究表明，0~20、20~40、40~60和60~80 cm土层的Moran指数分别为0.1643、0.1236、0.1955和0.2461，均在空间上呈现出显著正相关；4个土层的Z值分别为3.1510、2.5934、3.5903和4.6355，底层(40~60和60~80 cm)的土壤有机质空间正相关较显著、空间聚集程度最高，表层(0~20和20~40 cm)空间相关性不显著、空间聚集程度较低。半变异函数分析法表明，底层(40~60和60~80 cm)土层的块金效应分别为0.427和0.420，说明土壤有机质具有一定的空间相关性；表层(0~20和20~40 cm)土层的块金效应分别为0.033和0.045，土壤有机质的空间相关性较弱。结论 不同土层土壤有机质含量水平差异较大，南北方向呈增加趋势，东西方向呈减少趋势，局部地区存在明显的垂直分布特征。土壤有机质在表层(0~20和20~40 cm)空间相关性不显著，空间聚集程度较低；在底层(40~60和60~80 cm)空间相关性较显著，空间聚集程度较高。土壤有机质空间异质性受土壤类型、土壤质地、外围植被类型以及湖区面积变化的影响较大；在湖区外围生态屏障建设时，防护林树种、种植深度、种植密度的选择应当结合土壤有机质含量的空间分布状况进行。
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| 关 键 词： | 土壤有机质 空间自相关 半变异函数 趋势分析 反距离权重插值 |
| 收稿时间： | 2020/3/8 0:00:00 |
Spatial heterogeneity of soil organic matter in Mayi lake area of Karamay city |
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| SHANG Baijun,ZHENG Bowen,ZHOU Zhibin,WANG Lijie.Spatial heterogeneity of soil organic matter in Mayi lake area of Karamay city[J].Journal of South China Agricultural University,2021,42(1):72-81. |
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| Authors: | SHANG Baijun ZHENG Bowen ZHOU Zhibin WANG Lijie |
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| Institution: | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences/National Desert - Oasis Ecological Construction Engineering Technology Research Center, Urumqi 830011, China;Mosuowan Desert Research Station, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Shihezi 832000, China;Taklimakan Desert Research Station, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Korla 841000, China;University of Chinese Academy of Sciences, Beijing 100049, China; Taizhou Gaogang District Government Office, Taizhou 225321, China |
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| Abstract: | Objective To study the spatial distribution of soil organic matter in Mayi lake, the water source of the eastern ecological barrier of Karamay city, and provide scientific basis and data support for the ecological environment protection of the lake area.Method The study area of this paper was Mayi lake. Through field sampling and indoor analysis, the study used trend analysis method, inverse distance weight interpolation method, spatial autocorrelation method and semi-variogram function method to analyze the spatial distribution law of soil organic matter at different depths of Mayi lake.Result The trend analysis showed that the change rates of soil organic matter content in Mayi lake were different from 0?20, 20?40, 40?60 and 60?80 cm soil layers, but the overall trend was that soil organic matter content increased in the north-south direction and decreased in the east-west direction. The inverse distance weight interpolation method (IDW) showed that there are large horizontal distribution differences of soil organic matter contents in different soil layers, and regional obvious vertical distribution characteristics of soil organic matter content in Mayi lake. The trends in soil organic matter content change were highly consistent with trend analysis method. The overall performance of the north-south direction of soil organic matter content increased, the east-west direction showed a trend of decrease. The spatial autocorrelation method showed that Moran indexes of four layers were 0.164 3, 0.123 6, 0.195 5 and 0.246 1 respectively, showing a significant positive correlation on the space. The Z values of 0?20, 20?40, 40?60 and 60?80 cm soil layers were 3.151 0, 2.593 4, 3.590 3 and 4.635 5 respectively. The soil organic matter of underlayers (40?60, 60?80 cm) had obvious positive spatial correlation with the highest space aggregation degree. The surface layers (0?20, 20?40 cm) had no significant spatial correlation, and low spatial aggregation degree. The semi-variogram function method showed that the nugget effects of the underlayers (40?60 and 60?80 cm) were 0.427 and 0.420 respectively, indicating spatial correlation of soil organic matter was general. The nugget effects of the surface layers (0?20 and 20?40 cm) were 0.033 and 0.045 respectively, indicating high spatial correlation of soil organic matter. Conclusion The contents of soil organic matter in different soil layers vary greatly, and the north-south direction tends to increase, while the east-west direction tends to decrease. The spatial correlations of soil organic matter in the surface layers (0−20 and 20−40 cm) are not significant, and the spatial aggregation degrees are low, while the spatial correlations are significant and the spatial aggregation degrees are high in the underlayers (40−60 and 60−80 cm). The spatial heterogeneity of soil organic matter content is greatly affected by soil type, soil texture, vegetation type and the variation of lake area. While constructing ecological barrier in the periphery of lake area, the selection of shelterbelt tree species, planting depth and planting density should be combined with the spatial distribution of soil organic matter content. |
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| Keywords: | soil organic matter spatial autocorrelation semi-variogram trend analysis inverse distance weight interpolation |
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