氮沉降下西南山地针叶林根际和非根际土壤微生物养分限制特征差异

[an error occurred while processing this directive]

张英¹^,², 张常洪¹^,², 汪其同¹^,^*(

), 朱晓敏¹, 尹华军¹

Difference of microbial nutrient limiting characteristics in rhizosphere and bulk soil of coniferous forests under nitrogen deposition in southwest mountain, China

ZHANG Ying¹^,², ZHANG Chang-Hong¹^,², WANG Qi-Tong¹^,^*(

), ZHU Xiao-Min¹, YIN Hua-Jun¹

图3. 氮添加下西南山地华山松林根际和非根际土壤微生物群落的阈值元素比率与相应土壤有效养分比的关系(平均值±标准误)。CK, 对照处理; N, 施氮处理; S, 土壤位置; S × N, 土壤位置与施氮处理的交互效应。CKB, 非根际土壤对照处理; CKR, 根际土壤对照处理; NB, 非根际土壤施氮处理; NR, 根际土壤施氮处理。*, p < 0.05; **, p < 0.01; ***, p < 0.001; ns, p > 0.05; n = 3。

Fig. 3. Relationships between element ratio threshold of microbial community and soil available nutrient ratio in rhizosphere and bulk soil under nitrogen addition in Pinus armandii forest in southwest mountain, China (mean ± SE). CK, control treatment; N, nitrogen addition treatment; S, soil position; S × N, interaction effect between soil position and nitrogen addition treatment. CKB, control in bulk soil; CKR, control in rhizosphere soil; NB, nitrogen addition in bulk soil; NR, nitrogen addition in rhizosphere soil. *, p < 0.05; **, p < 0.01; ***, p < 0.001; ns, p > 0.05; n = 3.