贡嘎山树线过渡带土壤胞外酶活性及其化学计量比特征

[an error occurred while processing this directive]

李东¹^,², 田秋香², 赵小祥²^,³, 林巧玲²^,³, 岳朋芸²^,³, 姜庆虎², 刘峰²^,^*(

)

Soil extracellular enzyme activities and their stoichiometric ratio in the alpine treeline ecotones in Gongga Mountain, China

LI Dong¹^,², TIAN Qiu-Xiang², ZHAO Xiao-Xiang²^,³, LIN Qiao-Ling²^,³, YUE Peng-Yun²^,³, JIANG Qing-Hu², LIU Feng²^,^*(

)

图4. 贡嘎山树线过渡带土壤胞外酶化学计量比的变化(平均值±标准误)。CQI₁、CQI₂表示碳质量指数; E_cn1、E_cn2表示微生物碳、氮酶活性计量比。F1、F2、F3为树线下方的森林样方; S1、S2、S3为灌丛样方; Treeline为树线处样方。不同小写字母表示过渡带不同位置(植被类型)差异显著(p < 0.05)。

Fig. 4. Soil extracellular enzyme stoichiometry at different locations in the treeline ecotone in Gongga Mountain (mean ± SE). CQI₁, CQI₂ indicate carbon quality index; E_cn1, E_cn2 indicate microbial carbon and nitrogen enzyme activity stoichiometry ratios. F1, F2, F3 are the forest samples; S1, S2, S3 are the shrub samples; Treeline is the sample at the tree line. Different lowercase letters indicate significant differences (p < 0.05) between different locations or vegetation types in the treeline ecotone.