长期人为干扰对桂西北喀斯特草地土壤微生物多样性及群落结构的影响

裴广廷, 孙建飞, 贺同鑫, 胡宝清

Effects of long-term human disturbances on soil microbial diversity and community structure in a karst grassland ecosystem of northwestern Guangxi, China

PEI Guang-Ting, SUN Jian-Fei, HE Tong-Xin, HU Bao-Qing

表4 冗余分析中土壤性质对微生物多样性和群落结构变化的解释率

Table 4 Explain rates for the contribution of soil properties on variations in microbial α diversity and community structure in Redundancy analysis (RDA)

土壤性质 Soil property α多样性 α diversity 群落结构 Community structure 细菌 Bacteria 真菌 Fungi 细菌 Bacteria 真菌 Fungi E (%) p E (%) p E (%) p E (%) p 含水量 Moisture (%) 1.90 0.408 0.40 0.832 4.50 0.202 7.00 0.17 pH 4.50 0.188 0.30 0.852 2.60 0.37 0.60 0.868 有机碳含量 Soil organic carbon content (g·kg-1) 0.20 0.82 5.10 0.188 2.50 0.402 0.10 0.972 总氮含量 Total nitrogen content (g·kg-1) 0.80 0.572 1.40 0.536 1.00 0.728 4.10 0.46 碳氮比 Carbon-nitrogen ratio 5.30 0.166 10.90 0.072 0.50 0.854 1.00 0.784 微生物生物量碳含量 Microbial biomass carbon content (g·kg-1) 29.80 0.012 26.80 0.008 31.70 0.002 1.60 0.744 微生物生物量氮含量 Microbial biomass nitrogen content (g·kg-1) 0.20 0.792 6.30 0.176 3.10 0.322 6.10 0.23 细根生物量 Fine root biomass (g·m-2) 13.90 0.038 1.80 0.474 3.40 0.292 10.30 0.088