文献类型：期刊文献

中文题名：不同恢复模式下土壤化学性质及物种多样性的差异

英文题名：Differences in Soil Chemical Properties and Species Diversity under Different Restoration Modes

作者：杨泽凡[1] 李浩[1] 宋玉林[1] 陈洁[2]

第一作者：杨泽凡

机构：[1]广州市林业和园林科学研究院,广州510405;[2]中国林业科学研究院热带林业研究所

年份：2024

卷号：52

期号：11

起止页码：108-116

中文期刊名：东北林业大学学报

外文期刊名：Journal of Northeast Forestry University

收录：CSTPCD;;北大核心:【北大核心2023】；CSCD:【CSCD_E2023_2024】；

基金：广州市森林质量提升项目(2023-440118-000098)。

语种：中文

中文关键词：土壤化学性质;物种多样性;生态化学计量;森林恢复模式

外文关键词：Soil chemical properties;Species diversity;Ecological stoichiometry;Forest restoration model

分类号：S718.5

摘要：为了揭示不同恢复模式(人工恢复、天然恢复)对土壤化学性质及物种多样性的影响,以及生态系统恢复的关键机制。以广州市增城区为研究区,通过野外采样和实验室分析,比较不同恢复模式下,不同土壤深度的化学性质、生态化学计量比及植物物种多样性的差异。结果表明:不同恢复模式(人工恢复林、天然恢复林)的乔木层辛普森(Simpson)优势度指数差异显著(P<0.05),天然恢复林乔木层辛普森优势度指数为0.22,人工恢复林乔木层辛普森优势度指数为0.31;其他多样性指数无显著差异。不同恢复模式(人工恢复林、天然恢复林)的土壤全磷(TP)质量分数差异显著(P<0.05),天然恢复林土壤全磷(TP)质量分数为0.33 g/kg,人工恢复林土壤总磷(TP)质量分数为0.39 g/kg;土壤其他化学性质差异不显著。天然恢复林的土壤化学计量比显著高于人工恢复林(P<0.05),天然恢复林和人工恢复林的碳磷质量分数比(w(C)∶w(P))分别为120、100,氮磷质量分数比(w(N)∶w(P))分别为12、10。人工恢复林土壤速效钾(AK)对草本层物种多样性的影响正相关,土壤有效磷(AP)对所有层次的物种多样性的影响负相关;天然恢复林土壤pH、电导率(EC)、总钾(TK)质量分数和有机碳(SOC)质量分数对草本层物种多样性的影响具有显著的正相关(P<0.05)。土壤碳磷质量分数比(w(C)∶w(P))和氮磷质量分数比(w(N)∶w(P))是变异的主要来源;土壤碳磷质量分数比(w(C)∶w(P))和氮磷质量分数比(w(N)∶w(P))对第一主成分(PC1)的贡献率为21.6%,对第二主成分(PC2)的贡献率为16%。
To reveal the effects of different restoration modes(artificial restoration and natural restoration)on soil chemical properties and species diversity,as well as the key mechanisms of ecosystem recovery,this study was conducted in Zengcheng District,Guangzhou City.Through field sampling and laboratory analysis,we compared the differences in chemical properties,ecological stoichiometry,and plant species diversity at different soil depths under varying restoration modes.The results showed that there was a significant difference(P<0.05)in the Simpson dominance index of the tree layer between different restoration modes(artificial restoration forest and natural restoration forest),with the natural restoration forest having a Simpson dominance index of 0.22 and the artificial restoration forest a value of 0.31.No significant differences were observed for other diversity indices.There was also a notable difference in total phosphorous(TP)content(P<0.05)between the two restoration modes.The TP content in the soil of the natural restoration forest was 0.33 g/kg,while that in the artificial restoration forest was 0.39 g/kg.However,other soil chemical properties showed no significant differences.The ecological stoichiometry of the natural restoration forest was significantly higher than that of the artificial restoration forest(P<0.05),with carbon-to-phosphorous ratios(w(C)∶w(P))of 120 and 100,and nitrogen-to-phosphorous ratios(w(N)∶w(P))of 12 and 10 respectively.In addition,the soil’s available potassium(AK)positively correlated with the species diversity of the herbaceous layer,whereas available phosphorous(AP)negatively affected species diversity across all layers.Soil pH,electrical conductivity(EC),total potassium(TK)content,and soil organic carbon(SOC)content in the natural restoration forest had significant positive correlations(P<0.05)with the species diversity of the herbaceous layer.The carbon-to-phosphorous ratio(w(C)∶w(P))and nitrogen-to-phosphorous ratio(w(N)∶w(P))were identified as the main sources of variation,contributing 21.6% to the first principal component(PC1)and 16% to the second principal component(PC2).