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| 山东“蓝黄”两区耕层土壤有机质的时空分异特征研究 |
| Spatial and temporal variation characteristics of soil organic matter in topsoil in the "blue and yellow" economic zones of Shandong Province |
| 投稿时间：2020-10-07 修订日期：2020-11-12 |
| DOI： |
| 中文关键词: 土壤有机质 时空分异 风险评估 “蓝黄”两区 |
| 英文关键词: soil organic matter spatiotemporal differentiation risk assessment Shandong Peninsula Blue Economic Zone and the Yellow River Delta Efficient Ecological Economic Zone |
| 基金项目:国家自然科学基金（41877003）；山东省重大科技创新工程项目（2019JZZY010724）；山东省“双一流”奖补资金（SYL2017XTTD02） |
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| 中文摘要: |
| “蓝黄”两区是国家重点规划建设区，为研究其耕层土壤有机质的时空变异特征，综合经典统计学、地统计学和GIS方法，对2005与2017年两个时段的耕层（0~20cm）土壤有机质进行时空分异研究，通过指示克里格评估有机质缺乏的风险概率，进而研究了县域间有机质的聚集特征并提出规划建议。结果显示：（1）不同时期经济区的土壤有机质均具有中等的空间变异性和自相关性，变异系数在25.68%~35.46%之间，块基比在45.45%~55.01%之间。（2）近10年“蓝黄”两区有机质的年平均增速分别为0.21g·kg-1和0.32g·kg-1。2017年的平均有机质含量分别为14.65g·kg-1和16.04g·kg-1，内陆平原区有机质含量高，山丘与滨海平原区有机质含量低；同时有机质缺乏的风险概率较低，分别为0.21和0.14。（3）“蓝黄”两区有机质的空间聚集特征显著，限制建设区（H-H型）与综合整治区（L-L型）均以“组团”形式分布。研究发现近10年“蓝黄”两区的耕层有机质在时间上不断累积，空间上呈聚集分布，为区域规划和农业可持续发展提供了科学依据。 |
| 英文摘要: |
| The "blue and yellow" economic zones are national key planning and construction areas. In order to study the spatiotemporal variation characteristics of soil organic matter (SOM) in the topsoil, the classical statistics, geostatistics and GIS methods were used to explore the spatiotemporal variation of soil organic matter in the plough layer (0 ~ 20 cm) in 2005 and 2017. The risk probability of organic matter deficiency was evaluated by indicator Kriging, and the accumulation characteristics of organic matter among counties were studied and planning suggestions were put forward. The results showed that: (1) the soil organic matter had moderate spatial variability and autocorrelation in different periods, with coefficient of variation ranging from 25.68% to 35.46%, and C0/(C+C0) ranging from 45.45% to 55.01%. (2) In recent 10 years, the annual average growth rates of organic matter in "blue and yellow" areas were 0.21g·kg-1 and 0.32g·kg-1, and the average organic matter content was 14.65g·kg-1 and 16.04g·kg-1, respectively. The organic matter content in inland plain was high, while that in hilly and coastal plain was low. At the same time, the risk probability of organic matter deficiency was low, which was 0.21 and 0.14, respectively. (3) The spatial accumulation characteristics of organic matter in the "blue and yellow" areas were significant, and the restricted construction area (H-H type) and comprehensive treatment area (L-L type) distributed in the form of "clusters". It is found that organic matter in the plough layer of "blue and yellow" areas has accumulated in time and accumulated in space in recent 10 years, which provides scientific basis for regional planning and agricultural sustainable development. |
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