基于地质建造的土壤营养元素空间分布特征研究--以大凉山区为例

Study on Spatial Distribution Characteristics of Soil Nutrient Elements Based on Geological Construction--Take Daliangshan Region as an Example

为探索中-高山地区植物生长必需的土壤营养元素空间分布状况,以具有多元地貌的大凉山区为研究区,按照不同成土母质的岩石成因类型将研究区划分为8个地质建造,在该基础上选取植物生长所必需的5种营养元素Cu、Zn、Mn、Mo、B,开展了研究区基于地质建造的土壤营养元素含量空间分布特征研究。结果表明:研究区8个地质建造内土壤中Cu、Zn、Mn、Mo元素都基本可以满足植物生长的需求,其中前震旦纪中酸性岩建造内土壤中相对缺乏Cu、Mo元素,应该注意土壤中Cu、Mo元的适当补给;二叠纪陆内基性-超基性岩建造内土壤中Cu、Zn元素含量过高,应注意农林业植物适宜性选种;8个地质建造内土壤中B元素均处于缺乏—稍缺水平,应注意土壤中B元素的补给。本研究成果对当地土地利用与规划和生态环境保护具有一定的理论意义和参考价值。

In order to explore the spatial distribution of soil nutrient elements necessary for plant growth in middle-alpine areas,Daliangshan Region with multiple landforms is taken as the study area.According to the rock genetic types of different soil parent materials,we divide the study area into eight geological formations,and selecte 5 kinds of nutrient elements necessary for plant growth,namely,Cu,Zn,Mn,Mo and B,and study the spatial distribution characteristics of micronutrient elements based on geological formation in the study area.The results show that the elements of Cu,Zn,Mn and Mo in the 8 geological formations of the study area basically meet the needs of plant growth.Among them,the soil in pre Sinian intermediate acid rock formation is relatively short of Cu and Mo elements,so appropriate recharge should be paid attention to;the contents of Cu and Zn in Permian continental basic ultrabasic rock formation are too high,so attention should be paid to the suitability selection of agroforestry plants;the content of element B in the 8 geological formations is at lack-slightly lack level,and attention should be paid to the supply of element B.The research results have certain theoretical significance and reference value for local land utilization,planning and ecological environment protection.