Jia Yang, Abolfazl Masoudi, Hao Li, Yifan Gu, Can Wang, Min Wang, Changhao Wu, Yuanjie Liu, Xin Zhao, Zhijun Yu, Jingze Liu
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We observed moderate levels of total nitrogen (TN), soil organic matter (SOM), total phosphorus (TP), and total potassium (TK) content, characterized by a strong overall trend in TP and TK. Furthermore, the spatial distribution of soil water content (SWC), salt salinity (SS), and electrical conductivity (EC) displayed a patchy pattern, with high-value regions predominantly concentrated in the southern, western, and northwestern areas. Path modeling unveiled the substantial influence of mean annual relative humidity (MARH) and mean annual temperature (MAT) on SOM in farmlands and park-green lands. In contrast, mean annual precipitation (MAP), MAT, and MARH exerted notable total effects on SOM in woodlands. Significant variations in soil physicochemical characteristics were observed among different land use types, particularly notable in farmlands and inland tidal flats compared to woodlands and park-green lands. 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引用次数: 0
摘要
雄安新区(XNA)是国家划定的区域,具有突出的新兴趋势、密集的人类活动和快速的城市化特征。然而,该地区的土地利用管理影响和气候因素对土壤特性的综合影响调查尚需进一步明确。我们从该地区采集了 544 个表土复合样本,研究土壤特性与土地利用类型之间的关系。我们利用地理统计、ArcGIS、曼特尔检验、结构方程模型和随机森林回归分析了气候因素对土壤特性的影响。我们观察到总氮(TN)、土壤有机质(SOM)、总磷(TP)和总钾(TK)含量处于中等水平,其中总磷(TP)和总钾(TK)的总体趋势较强。此外,土壤含水量(SWC)、盐分(SS)和电导率(EC)的空间分布呈现斑块状,高值区主要集中在南部、西部和西北部地区。路径模型揭示了年平均相对湿度(MARH)和年平均温度(MAT)对农田和公园绿地 SOM 的重要影响。相比之下,年平均降水量(MAP)、年平均相对湿度(MAT)和年平均相对湿度(MARH)对林地中的 SOM 具有显著的总体影响。不同土地利用类型的土壤理化特征存在显著差异,农田和内陆滩涂与林地和公园绿地相比尤为明显。这些发现凸显了不同土地利用类型中气候因素与城市土壤有机质水平之间复杂的相互作用,并受到土壤全氮水平的影响。
Soil Total Nitrogen Mediated the Impact of Climatic Factors on Urban Soil Organic Matter Under Different Land Uses
The Xiong'an New Area (XNA) is a nationally designated region characterized by prominent emerging trends, intensive human activities, and rapid urbanization. However there needs to be more clarity regarding the comprehensive investigation of land use management impact and climate factors on soil properties within this area. We collected 544 composite topsoil samples from this region to investigate the relationship between soil properties and land use types. We analyzed how climate factors affects soil properties using geostatistics, ArcGIS, Mantel test, structural equation modeling, and random forest regression. We observed moderate levels of total nitrogen (TN), soil organic matter (SOM), total phosphorus (TP), and total potassium (TK) content, characterized by a strong overall trend in TP and TK. Furthermore, the spatial distribution of soil water content (SWC), salt salinity (SS), and electrical conductivity (EC) displayed a patchy pattern, with high-value regions predominantly concentrated in the southern, western, and northwestern areas. Path modeling unveiled the substantial influence of mean annual relative humidity (MARH) and mean annual temperature (MAT) on SOM in farmlands and park-green lands. In contrast, mean annual precipitation (MAP), MAT, and MARH exerted notable total effects on SOM in woodlands. Significant variations in soil physicochemical characteristics were observed among different land use types, particularly notable in farmlands and inland tidal flats compared to woodlands and park-green lands. These findings highlight the complex interplay between climatic factors and urban soil organic matter levels across diverse land uses, influenced by soil total nitrogen levels.
期刊介绍:
The Journal of Soil Science and Plant Nutrition is an international, peer reviewed journal devoted to publishing original research findings in the areas of soil science, plant nutrition, agriculture and environmental science.
Soil sciences submissions may cover physics, chemistry, biology, microbiology, mineralogy, ecology, pedology, soil classification and amelioration.
Plant nutrition and agriculture submissions may include plant production, physiology and metabolism of plants, plant ecology, diversity and sustainability of agricultural systems, organic and inorganic fertilization in relation to their impact on yields, quality of plants and ecological systems, and agroecosystems studies.
Submissions covering soil degradation, environmental pollution, nature conservation, and environmental protection are also welcome.
The journal considers for publication original research articles, technical notes, short communication, and reviews (both voluntary and by invitation), and letters to the editor.