青藏高原禾草混播对土壤微生物多样性的影响

姜鑫, 牛克昌

Effects of grass mixed-sowing on soil microbial diversity on the Qingzang (Tibetan) Plateau

JIANG Xin, NIU Ke-Chang

表3 广义线性混合模型检验土壤微生物多样性与各土壤理化因子及植物群落的相关关系(平均值±标准误)

Table 3 Association of soil microbial diversity with edaphic factors and plant community tested by generalized linear mixed effect model (mean ± SE)

固定因子 Fixed factor 细菌丰富度(Chao1) Bacterial richness (Chao1) R2 = 0.57* 细菌Shannon多样性 Bacterial Shannon diversity R2 = 0.57* 真菌丰富度(Chao1) Fungal richness (Chao1) R2 = 0.35 真菌Shannon多样性 Fungal Shannon diversity R2 = 0.19 土壤理化因子 soil edaphic factor 土壤pH Soil pH -15.24 ± 13.55 -0.10 ± 0.09 -9.79 ± 12.88 0.05 ± 0.18 土壤湿度 Soil humidity -25.96 ± 11.78* -0.09 ± 0.08 -21.80 ± 11.20 -0.13 ± 0.16 土壤全氮含量 Soil total nitrogen content 5.62 ± 19.72 0.13 ± 0.13 23.13 ± 19.02 0.04 ± 0.27 土壤全磷含量 Soil total phosphorus content -3.28 ± 13.36 -0.04 ± 0.08 -16.29 ± 12.92 -0.11 ± 0.18 土壤有效氮含量 Soil available nitrogen content -13.50 ± 9.53 -0.09 ± 0.06 3.67 ± 9.01 0.12 ± 0.13 土壤速效磷含量 Soil available phosphorus content 28.74 ± 11.99* 0.11 ± 0.08 1.07 ± 11.48 0.03 ± 0.17 土壤有机碳含量 Soil organic carbon content -0.25 ± 9.82 0.01 ± 0.06 -24.04 ± 9.38* -0.05 ± 0.14 植物群落 Plant community 植物地上生物量 Plant aboveground biomass -4.35 ± 10.83 -0.10 ± 0.07 -14.30 ± 10.47 -0.13 ± 0.15 植物物种丰富度 Plant species richness -23.85 ± 10.77* -0.14 ± 0.07 5.89 ± 10.18 -0.07 ± 0.15 处理影响 Treatment effect 混播 Mixed-sowing -91.07 ± 38.55* -0.47 ± 0.24 13.46 ± 38.35 -0.13 ± 0.53 施肥 Fertilized -103.52 ± 34.32* -0.37 ± 0.22 10.27 ± 32.62 -0.20 ± 0.48