亚热带人工林下植被根际土壤酶化学计量特征

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高雨秋^1,²,戴晓琴^1,^2,^3,^*(

),王建雷¹,付晓莉^1,^2,³,寇亮^1,^2,³,王辉民^1,^2,^3,⁴

Characteristics of soil enzymes stoichiometry in rhizosphere of understory vegetation in subtropical forest plantations

GAO Yu-Qiu^1,²,DAI Xiao-Qin^1,^2,^3,^*(

),WANG Jian-Lei¹,FU Xiao-Li^1,^2,³,KOU Liang^1,^2,³,WANG Hui-Min^1,^2,^3,⁴

图4. 亚热带人工林土壤酶活性及计量比的主成分分析(PCA)。相同取样季节, 林下植被土壤的酶活性及计量比PCA坐标平均值表征取样季节效应。同一林分类型下, 林下植被土壤酶的活性及计量比PCA坐标平均值表征林分类型的效应。同一林下植被类型土壤酶活性及计量比PCA坐标平均值为林下植被类型的效应。颜色代表林分: 红色, 杉木林; 绿色, 马尾松林; 蓝色, 湿地松林。CL, 杉木林; PM, 马尾松林; PE, 湿地松林; LC, 檵木; AM, 杨桐; EM, 格药柃; WJ, 狗脊蕨; DA, 暗鳞鳞毛蕨。

Fig. 4. Principal component analysis (PCA) of soil enzyme activities and ecoenzymatic stoichiometry in subtropical plantations. The effect of sampling seasons is from the average of PCA scores of soil enzyme activities and ecoenzymatic stoichiometry of understory vegetation within the same season. The effect of forest stand types is from the average of PCA scores of soil enzyme activities and ecoenzymatic stoichiometry of understory vegetation within the same forest stand type. The effect of understory species is from the average of PCA site scores of soil enzyme activities and ecoenzymatic stoichiometry of the same understory species. The colors represent the forest stand types: red symbols, Cunninghamia lanceolata forest; green symbols, Pinus massoniana forest; blue symbols, Pinus elliottii forest. CL, Cunninghamia lanceolata forest; PM, Pinus massoniana forest; PE, Pinus elliottii forest; LC, Loropetalum chinense; AM, Adinandra millettii; EM, Eurya muricata; WJ, Woodwardia japonica; DA, Dryopteris atrata.