青藏高原东缘高山森林-苔原交错带土壤微生物生物量碳、氮和可培养微生物数量的季节动态

刘洋, 张健, 闫帮国, 黄旭, 徐振锋, 吴福忠

Seasonal dynamics in soil microbial biomass carbon and nitrogen and microbial quantity in a forest-alpine tundra ecotone, Eastern Qinghai-Tibetan Plateau, China

LIU Yang, ZHANG Jian, YAN Bang-Guo, HUANG Xu, XU Zhen-Feng, WU Fu-Zhong

图2 高山森林-苔原交错带土壤微生物生物量碳(A)、氮(B)和碳氮比(C)和可培养细菌(D)、真菌(E)、放线菌(F)数量的季节变化(平均值±标准偏差)。不同小写字母表示相同季节里植被之间差异显著(p < 0.05); 不同大写字母表示相同植被在不同季节之间差异显著(p < 0.05)。EGS, 生长季初期; LGS, 生长季末期; MGS, 生长季中期。AM, 高山草甸; DCF, 暗针叶林; DS, 密灌丛; SS, 疏灌丛; Ti, 林线; Tr, 树线。

Fig. 2 Seasonal changes of soil microbial biomass carbon (A), nitrogen (B) and C: N (C), as well as quantity of cultivate bacteria (D), fungi (E) and actinomycetes (F) of soil in forest-alpine tundra ecotone (mean ± SD). Lower case letters indicate significant differences among different vegetations within same season (p < 0.05); upper case letters indicate significant differences among different seasons within same vegetation (p < 0.05). EGS, early in the growing season; LGS, late in the growing season; MGS, middle in the growing season. AM, alpine meadow; DCF, dark-conifer forest; DS, dense shrub; SS, sparse shrub; Ti, timberline; Tr, treeline.