西南亚高山针叶林主要树种互作及增温对根区土壤微生物群落的影响

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罗林¹^,³, 黄艳¹^,³, 梁进¹, 汪恩涛⁴, 胡君¹, 贺合亮¹^,³, 赵春章²^,^*(

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Effects of plant interspecific interaction and warming on soil microbial community in root zone soil of two dominant tree species in the subalpine coniferous forest in southwestern China

LUO Lin¹^,³, HUANG Yan¹^,³, LIANG Jin¹, WANG En-Tao⁴, HU Jun¹, HE He-Liang¹^,³, ZHAO Chun-Zhang²^,^*(

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图1. 未增温和增温时不同栽种处理根区土壤各微生物群落磷脂脂肪酸(PLFAs)含量(平均值±标准误差)。A, 总PLFAs和细菌的PLFAs含量。B, 革兰氏阴性菌(GN)和革兰氏阳性菌(GP)的PLFAs含量。C, 真菌(F)和放线菌(AC)的PLFAs含量。U, 未增温; W, 增温。C, 裸地; Y, 云杉单种; L, 冷杉单种; H, 混种; Fp, 树种效应; Fw, 增温效应; Fp × w, 树种和增温的交互效应; *, p < 0.05; **, p < 0.01; ***, p < 0.001; ns, p > 0.05。不同小写字母表示未增温和增温时不同栽种处理根区土壤微生物群落PLFAs含量有显著差异(p < 0.05)。柱下*表示t检验有显著差异(p < 0.05)。

Fig. 1. Contents of phospholipid fatty acids (PLFAs) (mean ± SE) in root zone soil of different planting treatments with/ without warming. A, The content of total and bacteria PLFAs. B, The content of PLFAs of gram-negative bacteria (GN) and gram-positive bacteria (GP). C, The content of PLFAs of fungi (F) and actinomycetes (AC). U, unwarming; W, warming. C, unplanted area; Y, Picea asperata; L, Abies faxoniana; H, mixed; Fp, plant types effect; Fw, warming effect; Fp × w, plant types × warming interaction effect; *, p < 0.05; **, p < 0.01; ***, p < 0.001; ns, p > 0.05. Different lowercase letters indicate significant differences in PLFAs content in root zone of different planting treatments with and without warming (p < 0.05). * under the column indicates a significant difference in the t-test (p < 0.05).