| 粮食主产区耕地土壤有机碳空间分异特征及其影响因素：以河北省为例 |
| 摘要点击 1496 全文点击 337 投稿时间：2023-09-17 修订日期：2024-01-17 |
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| 中文关键词 耕地 土壤有机碳（SOC） 空间分异 影响因素 河北省 |
| 英文关键词 cultivated land soil organic carbon（SOC） spatial differentiation influencing factors Hebei Province |
| DOI 10.13227/j.hjkx.20241039 |
| 作者 | 单位 | E-mail | | 谢恩怡 | 中国农业大学土地科学与技术学院, 北京 100193 | xieenyi2000@163.com | | 姚东恒 | 中国农业大学土地科学与技术学院, 北京 100193 | | | 廖宇波 | 中国农业大学土地科学与技术学院, 北京 100193 | | | 陈文广 | 中国农业大学土地科学与技术学院, 北京 100193 | | | 赵晶 | 中国农业大学土地科学与技术学院, 北京 100193
北京方圆大地规划设计咨询有限公司, 北京 100193 | | | 赵振庭 | 中国农业大学土地科学与技术学院, 北京 100193 | | | 赵维全 | 河北省国土整治中心, 石家庄 050031 | | | 张莹 | 河北省国土整治中心, 石家庄 050031 | | | 孔祥斌 | 中国农业大学土地科学与技术学院, 北京 100193 | kxb@cau.edu.cn |
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| 中文摘要 |
| 揭示粮食主产区耕地土壤有机碳（SOC）空间分异特征,对于区域耕地质量管理和国家粮食安全具有重要意义. 通过调查河北省519个耕地土壤剖面（0~120 cm均等分为6层）,获取2 961份采样数据,利用地统计学方法和空间探索性分析方法,揭示了河北省耕地SOC空间分布格局,探究了气候、地形地貌、土壤属性和人为利用对耕地SOC空间分布的影响. 结果表明：①河北省耕地SOC含量随着土层深度增加呈减少趋势,其中A1（0~20 cm）的ω（SOC）平均值最高,为9.57 g·kg-1,A6（100~120 cm）的ω（SOC）平均值最低,为4.17 g·kg-1,变异系数随土层深度增加呈增加趋势. ②河北省不同深度耕地SOC具有相似的水平空间分布特征,总体上均呈现西北高、东南低的态势. ③土壤质地和地形地貌是河北省耕地SOC空间变异的主控因素,表现为土壤质地越黏重SOC含量越大,海拔越高SOC含量越大的趋势；土壤pH对剖面SOC含量的影响也不容忽视,表层SOC含量主要受人为利用的影响,而底层受积温的影响较大. |
| 英文摘要 |
| Assessing the spatial differentiation characteristics of soil organic carbon （SOC） in cultivated land in major grain-producing areas is important for regional cultivated land quality management and national food security. We investigated 519 soil profiles of cultivated land in Hebei Province （0-120 cm equally divided into six layers）, and obtained 2961 samples. We used geostatistical methods and spatial exploratory analysis to reveal the spatial distribution pattern of SOC in cultivated land in Hebei Province and the impacts of climate, topography, geomorphology, soil properties, and anthropogenic use on the spatial distribution of SOC in cultivated land soils. The results showed that： ① The SOC content of cultivated land in Hebei Province showed a decreasing trend with the increase in soil depth, with the highest mean value of ω（SOC） of 9.57 g·kg-1 in A1 （0-20 cm） and the lowest mean value of 4.17 g·kg-1 in A6 （100-120 cm）, and the coefficient of variation showed an increasing trend with the increase in soil depth. ② The SOC at different depths of cultivated land in Hebei Province had similar horizontal spatial distribution characteristics, and in general, showed a trend of being high in the northwest and low in the southeast. ③ Soil texture and topography were the main influencing factors for the spatial variation of SOC in cultivated land in Hebei Province, showing that the more clay-rich the soil texture, the greater the SOC content, and the higher the elevation, the greater the SOC content. Soil pH also influenced the SOC content of the profile. The SOC content of the surface layer is mainly affected by anthropogenic use, whereas the bottom layer is affected by the cumulative temperature. |
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