| 孙厚云,卫晓锋,张晓敏,贾凤超,李多杰,刘卫,李健,陈自然.河北承德中部伊逊河红旗地区土壤生源要素空间分布格局及其影响因素[J].矿产勘查,2021,12(4):1008-1018 |
| 河北承德中部伊逊河红旗地区土壤生源要素空间分布格局及其影响因素 |
| Spatial variation and influencing factors of soil biogenic elements distribution in Hongqi town of Yixun River Basin in Chengde City |
| 投稿时间：2020-01-15 |
| DOI： |
| 中文关键词: 生源要素 土壤养分 空间变异 伊逊河 承德 河北 |
| 英文关键词: biogenic elements soil nutrient spatial variation Yixun River Basin Chengde Hebei Province |
| 基金项目:中国地质调查局项目承德市生态文明示范区综合地质调查(编号:DD20160229-01;DD20190822)资助。 |
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| 中文摘要: |
| 土壤生源要素的含量和空间分布特征对指导土壤肥力调控，优化土地利用具有重要意义。以承德市伊逊河红旗周边地区为例，采集不同深度和典型剖面土壤样品，综合运用描述性统计、地统计半方差函数模型和冗余分析等方法，论述了研究区土壤生源要素碳、氮、磷和钾的空间分布格局与影响因素。结果表明，研究区表层土壤 TN含量平均为 848.74 mg/kg，总体较为缺乏；土壤 Corg平均含量为 1.35%，总体属中度水平； TP和 TK含量相对丰富。 TN、 Corg、 TP和 TK土地质量地球化学等级属较丰富以上水平的样品占比分别为 7.71%、 26.18%、 35.08%和 77.85%。深层土壤 TN和 TP含量显著低于表层土壤，垂向分布上 TN和 TP含量总体呈随深度增加而降低的趋势， TK含量呈先下降后上升的趋势。土壤 TP和 TK空间分异以结构性变异为主，具有强烈的空间自相关性； TN和 Corg分布具有中度的自相关性，空间分布受土地利用类型控制，也受农业活动等人为因素影响；土壤 TP空间分布受成土母质和矿业活动因素共同影响，土壤 TK空间分布则主要受成土母质自然因素控制。 |
| 英文摘要: |
| Soil biogenic elements including organic carbon, nitrogen, phosphorus and potassium are of great signi.cance to soil fertility improving and land resource optimization. Soil samples of di.erent depths and typical pro.les were collected in in the small-scale drainage catchment of Yixun River Basin of Hongqi town in Chengde City. Furthermore, the spatial structure and distribution characteristics of the biogenic elements were assessed based on descriptive statistical method and geostatistical analysis, while the in.uencing factors of soil biogenic elements distribution were identi.ed by redundancy analysis. The results indicated that the average content of soil TN and Corg was 848.74 mg/kg and 1.35% respectively. The geochemical grade of land quality of total nitrogen was categorized as insu.cient level while the Corg categorized as moderate level, TPand TK categorized as rich level. The proportion of TN, Corg, TP and TK samples categorized above relatively rich geochemical grade was 7.71%, 26.18%, 35.08% and 77.85%, respectively. The contents of TN and TP in deep soil were significantly lower than those in surface soil. In the vertical distribution, the contents of TN and TP were generally decreased with the increase of depth, while the content of TK was .rstly decreased and then increased. The spatial variation of soil TP and TK exhibited strong spatial autocorrelation with a structural variation. The spatial distribution of TN and Corg was controlled by land use types, and a.ected by agricultural activities, while the distribution of soil TP was a.ected by both parent materials and mining activities, and the soil TK mainly controlled by natural factors of parent materials. |
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