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引用本文:谷志云,廖诗进,赵新雷,等.郑州市耕地表层土壤有机碳量分布特征[J].灌溉排水学报,2024,43(6):93-98.
GU Zhiyun,LIAO Shijin,ZHAO Xinlei,et al.郑州市耕地表层土壤有机碳量分布特征[J].灌溉排水学报,2024,43(6):93-98.
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郑州市耕地表层土壤有机碳量分布特征
谷志云,廖诗进,赵新雷,付巧玲,盛 奇,李 兵,郭 强,杜保军
1.河南省地质研究院,郑州 450001;2.河南省城市地质工程技术研究中心, 郑州 450001;3.河南省地球化学生态修复工程技术研究中心,郑州 450001; 4.河南省地质矿产勘查开发局第五地质勘查院,郑州 450001
摘要:
【目的】研究郑州市耕地表层土壤有机碳(SOC)的地球化学分布特征,为当地种植施肥、土地资源合理利用、土壤肥力综合研究、保护环境等领域提供农业地质学基础数据。【方法】采用网格化定位系统布点采集耕地表层土壤样品,用VOL容重法结合多目标地球化学评价指标,圈定出研究区不同土壤类型的有机碳量地球化学分布特征;用地球化学勘查数据一体化处理系统(GeoChemStudio)进行数据参数统计,分析区内耕地表层土壤的有机碳与土壤中氮磷钾及微量营养元素的相关性;根据有机碳储量计算公式估算郑州市不同土壤类型的表层土壤有机碳密度。【结果】郑州市不同土壤类型中石灰性粗骨土表层土壤有机碳量最高,平均值为2.307%,富集系数23.07%;研究区耕地土壤有机碳呈塔式正态分布,有机碳量为0.1%~11.6%,算术平均值为1.134%。表层土壤有机碳与N、P2O5、Fe、Mn、Zn、Cu、Mo、B相关系数分别为0.804 5、0.223 0、0.156 3、0.119 1、0.223 8、0.263 4、0.162 8、0.191 1,与K2O、pH值负相关,相关系数分别为-0.088 8、-0.195 7。【结论】郑州市表层土壤有机质量整体比较缺乏,丰富级、较丰富级呈灶状零星分布在研究区西南部新密市、登封市及巩义市。研究区表层土壤有机碳量平均值为1.09%,不同土壤类型中,粗骨土及石灰性褐土类表层土壤有机质量较高。有机碳密度较大的土壤类型有石灰性粗骨土、石灰性褐土、石灰性红黏土等。郑州市全区表层土壤有机碳储量合计1 012.87万t,褐土性土+石灰性褐土有机碳储量达523.13万t,占全区51.64%。
关键词:  土壤;有机碳;土壤养分;郑州市
DOI:10.13522/j.cnki.ggps.2023346
分类号:
基金项目:
Spatial distribution of soil organic carbon in the plough layer in the region of Zhengzhou
GU Zhiyun, LIAO Shijin, ZHAO Xinlei, FU Qiaoling, SHENG Qi, LI Bing, GUO Qiang, DU Baojun
1. Henan Academy of Geology, Zhengzhou 450001, China; 2. Henan Research Center of Urban Geological Engineering Technology, Zhengzhou 450001, China; 3. Henan Geochemistry Ecological Restoration Engineering Technology Research Center, Zhengzhou 450001, China; 4. Fifth Geological Exploration Institute of Henan Bureau of Geological and Mineral Exploration and Development, Zhengzhou 450001, China
Abstract:
【Objective】Soil organic carbon (SOC) is not only an indicator of soil health but also plays a crucial role in feedback interaction between global warming and carbon stock in terrestrial ecosystems. Its dynamics is modulated by a multitude of interactive abiotic and biotic factors. In this paper, we analyze the spatial distribution of SOC in the plough layer and its correlation with soil texture and other geochemical properties in the region of Zhengzhou in Henan province.【Method】Soil samples were taken from a grid network in the region. SOC, bulk density, soil texture and other geochemical properties in each soil sample were measured. The correlation between SOC and soil nutrients, including nitrogen, phosphorus, potassium and micronutrients in the soil, was analyzed using the GeoChemStudio software.【Result】The calcareous skeletol soil in the region has the highest SOC, reaching 2.307%. The SOC content varied from 0.1%-11.6% across the region, and was normally distributed with a mean of 1.134%. The SOC was positively correlated with N, P2O5, Fe, Mn, Zn, Cu, Mo and B, and their associated correlation coefficients were 0.804 5, 0.223 0, 0.156 3, 0.119 1, 0.223 8, 0.263 4, 0.162 8 and 0.191 1, respectively. Negative correlations were found between SOC and K2O and pH, and their associated correlation coefficients were -0.088 8 and -0.195 7, respectively. The average SOC content in the plough layer in the region was 1.09%. Spatially, SOC was rich in Xinmi, Dengfeng and Gongyi in the southwest of the region. In terms of soil texture, SOC is higher in skeletol soil and calcareous cinnamon soil than in other soils. SOC stored in the topsoil in the whole region was 1 012.87×104 t, with 523.13×104 t stored in the cinnamon soils and calcareous cinnamon soils, accounting for 51.64% of the total topsoil SOC in the region.
Key words:  soil; organic carbon; soil nutrients; Zhengzhou region