模拟根系分泌物C:N化学计量特征对川西亚高山森林土壤碳动态和微生物群落结构的影响

梁儒彪, 梁进, 乔明锋, 徐振锋, 刘庆, 尹华军

Effects of simulated exudate C:N stoichiometry on dynamics of carbon and microbial community composition in a subalpine coniferous forest of western Sichuan, China

LIANG Ru-Biao,LIANG Jin,QIAO Ming-Feng,XU Zhen-Feng,LIU Qing,YIN Hua-Jun

表2 不同C:N化学计量特征的根系分泌物模拟溶液的化学组成和含量

Table 2 Chemical components and contents of simulated root exudates in different C:N stoichiometry

处理 Treatment 葡萄糖 Glucose (g) 柠檬酸 Citric acid (g) 谷氨酸 Glutamic acid (g) 氯化铵 NH4Cl (g) 去离子水 Deionized water (mL) 对照 Control (CK) - - - - 1 000 仅添加N N-only - - - 0.022 9 1 000 C:N = 10 0.075 3 0.075 3 0.016 8 0.016 8 1 000 C:N = 50 0.083 0 0.083 0 0.003 4 0.003 4 1 000 C:N = 100 0.084 0 0.084 0 0.001 7 0.001 7 1 000 仅添加C C-only 0.085 0 0.085 0 - - 1 000