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徐钧杰 , 陈旭, 刘宗悦, 庞春梅, 余树全. 天目山常绿阔叶林土壤养分的空间异质性与植物组成之间的关系[J]. 浙江林业科技, 2022, 42(3): 33-41. DOI: 10.3969/j.issn.1001-3776.2022.03.005
引用本文: 徐钧杰 , 陈旭, 刘宗悦, 庞春梅, 余树全. 天目山常绿阔叶林土壤养分的空间异质性与植物组成之间的关系[J]. 浙江林业科技, 2022, 42(3): 33-41. DOI: 10.3969/j.issn.1001-3776.2022.03.005
XU Jun-jie, CHEN Xu, LIU Zong-yue, PANG Chun-mei, YU Shu-quan. Relationship between Spatial Heterogeneity of Soil Nutrients and Plant Composition in the Evergreen Broad-leaved Forest of Tianmu Mountain[J]. Journal of Zhejiang Forestry Science and Technology, 2022, 42(3): 33-41. DOI: 10.3969/j.issn.1001-3776.2022.03.005
Citation: XU Jun-jie, CHEN Xu, LIU Zong-yue, PANG Chun-mei, YU Shu-quan. Relationship between Spatial Heterogeneity of Soil Nutrients and Plant Composition in the Evergreen Broad-leaved Forest of Tianmu Mountain[J]. Journal of Zhejiang Forestry Science and Technology, 2022, 42(3): 33-41. DOI: 10.3969/j.issn.1001-3776.2022.03.005

天目山常绿阔叶林土壤养分的空间异质性与植物组成之间的关系

Relationship between Spatial Heterogeneity of Soil Nutrients and Plant Composition in the Evergreen Broad-leaved Forest of Tianmu Mountain

  • 摘要: 研究常绿阔叶林下土壤养分的空间异质性与植物组成的关系,有利于揭示土壤空间异质性的形成原因,更 好地理解植物与土壤之间的相互影响,为森林生态系统的恢复重建提供科学依据。以浙江省天目山国家级自然保 护区常绿阔叶林为研究对象,采集了61 个土壤样品进行pH 值和7 种土壤养分指标测定,并对样地内胸径≥1 cm 的植物个体进行每木检尺,运用地统计学和Kriging 插值等方法,分析了土壤养分的空间异质性及其与植物组成 的关系。结果表明:土壤pH、有机质(SOM)、全氮(TN)、全磷(TP)和全钾(TK)含量的变异系数在10%~30% 之间,属于中等变异,而碱解氮(AN)、速效磷(AP)和速效钾(AK)含量的变异系数>30%,呈现高度变异; 土壤pH、TN、TP、TK、AP 和AK 含量的块基比均<0.25,呈强烈的空间自相关,而SOM 和AN 的块基比在0.25 ~ 0.75 之间,为中等程度的空间自相关。从Pearson 相关性分析结果来看,土壤pH 和TP、TK、AK 含量与 Shannon-Wiener 多样性指数、Margalef 丰富度指数均呈显著的负相关;落叶树种重要值与土壤SOM、TN、AN、 AP 和AK 含量有显著的正相关关系,而常绿树种则相反;针叶树种重要值与土壤pH、SOM、TN、AN 和AP 含 量存在显著的负相关关系,阔叶树种则相反。冗余分析结果表明,土壤pH 是影响研究区植物分布的最重要因素。 以上研究结果表明,天目山常绿阔叶林土壤养分具有明显的空间异质性,且植物组成是影响土壤养分空间异质性 的重要因素。

     

    Abstract: In October 2020, 25 sample plots with area of 20m×20m were established in the evergreen broad-leaved forest in the Tianmu Mountain National Nature Reserve of Zhejiang province. Tally was made on plants with DBH ≥ 1cm, and soil samples were collected for pH and 7 soil nutrient content determination. Spatial heterogeneity of soil nutrient content and its relationship with plant composition was analyzed by geostatistics and Kriging interpolation. The results showed that the variation coefficients of soil pH, organic matter (SOM), total nitrogen (TN), total phosphorus (TP) and total potassium (TK) content ranged from 10% to 30%, while that of available nitrogen (AN), available phosphorus (AP) and available potassium (AK) content were higher than 30%. Soil pH, TN, TP, TK, AP and AK showed strong spatial autocorrelation with C0/(C0+C)<0.25, while SOM and AN showed moderate spatial autocorrelation with C0/(C0+C) between 0.25 and 0.75. Pearson correlation analysis showed that soil pH, TP, TK and AK content was significantly negatively correlated with diversity and richness index. The importance values of deciduous tree species were positively correlated with soil SOM, TN, AN, AP, and AK content, while those of evergreen tree species were on the contrary. There was a significant negative correlation between the important value of coniferous species and soil pH, SOM, TN, AN, and AP content, while that of broad-leaved species was the opposite. The redundancy analysis showed that soil pH was the most important factor affecting vegetation distribution in the study area.

     

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