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| 近30年广西土壤有机质演变特征 |
| The evolutionary characteristics of soil organic matter in Guangxi over the past 30 years |
| Received:July 20, 2021 |
| DOI：10.13254/j.jare.2021.0442 |
| 中文关键词: 广西，土壤有机质，时空演变，动态度 |
| 英文关键词: Guangxi, soil organic matter, spatiotemporal evolution, dynamicity |
| 基金项目:广西科技基地和人才专项（AD18126012）；广西一流学科（地理学）建设经费；广西八桂学者专项经费；南宁师范大学大学生创新创业训练计划项目（202010603275）；北部湾环境演变与资源利用教育部重点实验室开放课题（GTEU-KLOP-X1704） |
| Author Name | Affiliation | E-mail | | XIE Xiansheng | Guangxi Geographical Indication Crops Research Center of Big Data Mining and Experimental Engineering Technology, Nanning Normal University, Nanning 530001, China
School of Geography and Planning, Nanning Normal University, Nanning 530001, China | | | KANG Jili | Guangxi Soil Fertilizer Workstation, Nanning 530007, China | | | FENG Xinxin | School of Geography and Planning, Nanning Normal University, Nanning 530001, China | | | LIU Wenqi | Guangxi Soil Fertilizer Workstation, Nanning 530007, China | | | HOU Xianda | Guangxi Geographical Indication Crops Research Center of Big Data Mining and Experimental Engineering Technology, Nanning Normal University, Nanning 530001, China
Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, Nanning 530001, China
Key Laboratory of Environment Change and Resources Use in Beibu Gulf of Ministry of Education, Nanning Normal University, Nanning 530001, China | | | WANG Shuojin | Guangxi Geographical Indication Crops Research Center of Big Data Mining and Experimental Engineering Technology, Nanning Normal University, Nanning 530001, China
Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, Nanning 530001, China
Key Laboratory of Environment Change and Resources Use in Beibu Gulf of Ministry of Education, Nanning Normal University, Nanning 530001, China | | | JIA Shugang | Guangxi Geographical Indication Crops Research Center of Big Data Mining and Experimental Engineering Technology, Nanning Normal University, Nanning 530001, China
Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, Nanning 530001, China
Key Laboratory of Environment Change and Resources Use in Beibu Gulf of Ministry of Education, Nanning Normal University, Nanning 530001, China | | | LIU Shutian | Guangxi Geographical Indication Crops Research Center of Big Data Mining and Experimental Engineering Technology, Nanning Normal University, Nanning 530001, China
Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, Nanning 530001, China
Key Laboratory of Environment Change and Resources Use in Beibu Gulf of Ministry of Education, Nanning Normal University, Nanning 530001, China | liushutian6952@126.com | | HOU Yanlin | Guangxi Geographical Indication Crops Research Center of Big Data Mining and Experimental Engineering Technology, Nanning Normal University, Nanning 530001, China
Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, Nanning 530001, China
Key Laboratory of Environment Change and Resources Use in Beibu Gulf of Ministry of Education, Nanning Normal University, Nanning 530001, China | 2483977138@qq.com |
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| 中文摘要: |
| 土壤有机质（SOM）是衡量农业生产力和土壤整体健康的重要指标，对促进区域粮食安全和缓解全球变暖下的粮食危机具有重要意义。为揭示1984—2009年广西全域SOM变化情况，基于广西第二次土壤普查项目（1984年）和广西测土配方施肥项目（2009年）两期数据，利用地统计学、动态度、分布指数等方法分析了广西土壤表层SOM时空演变特征及其在不同海拔高度上的分布状况。结果显示，近30年广西SOM总体含量大幅提升，各含量等级已由零散交错的不均匀分布演变为相对集中的连片分布，分布面积呈现：等级4（20~30 g·kg-1）>等级5（30~40 g·kg-1）>等级6（>40 g·kg-1）>等级3（10~20 g·kg-1）>等级1（≤6 g·kg-1）>等级2（6~10 g·kg-1），等级4和等级5所占比例分别由1984年的28.20%和18.73%提升至2009年的38.09%和36.19%。在变化速率方面，等级2减少最为迅速，动态度为-3.76%，等级5增加最为迅速，动态度为3.73%，各等级动态度表现为等级2>等级5>等级1>等级3>等级4>等级6。在不同海拔高度上，除等级4和等级6外，其余等级的分布指数曲线均发生了较大变动。在海拔≤200 m的区域，等级3始终保持着高优势位特征，而等级6对海拔变动保持较强的选择性，随海拔上升其优势位愈发明显。研究表明，广西SOM各含量等级及空间分布均存在较大差异，海拔是其重要的影响因素。 |
| 英文摘要: |
| Soil organic matter(SOM)is an important indicator of agricultural productivity and soil health, which plays a significant role in promoting regional food security and alleviating the food crisis under global warming. Based on the data from the second soil investigation project(1984)and the soil testing and formulated fertilization project(2009)in Guangxi, temporal and spatial evolution characteristics of surface SOM and its distribution at different elevations were studied using geostatistics, dynamic methods, and distribution indices to further reveal the change in SOM in Guangxi from 1984 to 2009. The results showed that the total SOM content has increased significantly over the past 30 years. The gradient of SOM content in Guangxi had evolved from an uneven point distribution to a relatively concentrated contiguous distribution. The distribution area was as follows:grade 4(20~30 g·kg-1)> grade 5(30~40 g·kg-1)> grade 6(>40 g·kg-1)> grade 3(10~20 g·kg-1)> grade 1(≤ 6 g·kg-1)> grade 2(6~10 g·kg-1). The proportions of grade 4 and grade 5 rose from 28.20% and 18.73% in 1984 to 38.09% and 36.19% in 2009, respectively. In terms of change speed, grade 2 reduced rapidly, with a dynamicity of -3.76%, grade 5 increased rapidly, with a dynamicity of 3.73%, showing that grade 2 > grade 5 > grade 1 > grade 3 > grade 4 > grade 6. Except for grade 4 and grade 6, the remaining grades of the distribution index curves changed at different altitudes. In the area of altitude ≤ 200 m, grade 3 had consistently maintained highly dominant features. Grade 6 remained highly selective to altitude changes. As the altitude increases, the superiority becomes obvious. The content and spatial distribution of SOM in Guangxi are quite different. Altitude is an important factor for it. |
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