| 摘要: |
| 植物与土壤的化学计量关系是理解植物体各组分的相互作用和环境适应性的关键，对园林植物的养护管理具有重要意义。本研究以茅台酒核心产区20种园林树木叶片和土壤为研究对象，采用方差分析、RDA分析、相关性分析等方法研究了叶片化学计量特征与土壤养分含量特征及其相关性，并对叶片C、N、P含量与比叶重的关系进行了探究。结果表明：20种园林树种叶片平均C、N、P含量分别为435.51 g·kg-1、20.16 g·kg-1、3.66 g·kg-1，C∶N、C∶P、N∶P平均值分别为24.73、138.63、5.81，与其他地区相比，研究区树种C含量较低，N含量正常，P含量较高，植物生长受N元素限制。常绿与落叶树种叶片C、N、P含量及比值存在差异，落叶树种N、P含量较高，常绿树种C含量及C∶N、C∶P较高。植物叶片C、N、P含量及比叶重之间相互关系分析显示：常绿树种C与N、P含量呈负相关性，N与P含量呈正相关性，落叶树种仅N与P含量呈正相关性；常绿与落叶树种比叶重与叶片C含量呈正相关，与N、P含量呈负相关。研究区土壤pH呈弱碱性，SOC平均含量较低，AN、AP、AK平均含量处于丰富水平。RDA分析结果显示，土壤因子对植物叶片指标的总体解释度较低，SOC含量解释能力最大。二者相关性探究发现，叶片C含量、C:P与土壤SOC含量呈显著正相关；叶片N含量与土壤AN含量呈显著正相关，叶片C:N与土壤AN含量呈显著负相关。结合植物叶片及土壤养分现状，建议厂区在后期植物养护中可适当增加有机肥料的施用。 |
| 关键词: 茅台酒核心产区 园林树种叶片 土壤 化学计量特征 |
| DOI： |
| 投稿时间：2025-01-10修订日期：2025-03-02 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| Leaf and soil stoichiometric characteristics of plants of major tree species in the Moutai liquor core production area |
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Tangyunxian1, Huchunming2, Zhuchangjun1, Liujakun1, Fengjiwen1
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| (1.Hebei University of Engineering;2.Research Center for Eco-Environmental Sciences) |
| Abstract: |
| Exploring the stoichiometric relationship between plants and soils is the key to understanding the interactions of plant body components and environmental adaptations, and is of great significance to the conservation and management of landscape plants. Taking the leaves and soils of 20 garden tree in the Moutai Ecological Functional Reserve as the research objects, we investigated the characteristics and correlations between leaf stoichiometry and soil nutrient content by using analysis of variance, RDA analysis, correlation analysis, etc., as well as the relationship between leaf C, N, P content and specific leaf weight. The results showed that the average C, N and P contents of leaves of 20 garden tree species were 435.51 g·kg-1, 20.16 g·kg-1 and 3.66 g·kg-1, respectively, and the average values of C∶N, C∶P and N∶P were 24.73, 138.63 and 5.81, respectively, and that the tree species of the study area had lower C contents, normal N contents and higher P contents compared with land plants in other regions or the country. Plant growth was limited by N element. There were differences in C, N and P content and ratio between evergreen and deciduous tree species, with higher N and P content in the leaves of deciduous tree species and higher C content and C∶N and C∶P in evergreen tree species. The analysis of the correlation between C, N, P contents and specific leaf weight of plant leaves showed that: leaf C of evergreen species was negatively correlated with N and P contents and positively correlated with N and P contents, while only N and P contents of deciduous species were positively correlated; specific leaf weight of both evergreen and deciduous species was positively correlated with leaf C content and negatively correlated with N and P contents.The soil pH in the study area was weakly alkaline, the average SOC content was low, and the average content of HN, AP, and AK was at the abundant level.The results of RDA analysis showed that the overall explanation of soil factors on plant leaf indexes was low, and the SOC content had the greatest explanatory power. The correlation between the two was found that leaf C content, C∶P and soil SOC content were significantly positively correlated; leaf N content was significantly positively correlated with soil HN content, and leaf C∶N was significantly negatively correlated with soil HN content. Combined with the current situation of plant leaves and soil nutrients, it is suggested that the plant can appropriately increase the input of organic fertilizers in the later plant maintenance. |
| Key words: Moutai Liquor core production area garden tree leaves soil stoichiometric characteristics |
