西南喀斯特石漠化环境适生植物构树细根、根际土壤化学计量特征

胡琪娟, 盛茂银, 殷婕, 白义鑫

Stoichiometric characteristics of fine roots and rhizosphere soil of Broussonetia papyrifera adapted to the karst rocky desertification environment in southwest China

HU Qi-Juan, SHENG Mao-Yin, YIN Jie, BAI Yi-Xin

表3 西南喀斯特石漠化环境构树细根和根际土壤的养分含量及化学计量特征(n = 153)

Table 3 Nutrient contents and stoichiometric characteristics of fine roots and rhizosphere soil of Broussonetia papyrifera in karst rocky desertification environment of Southwest China (n = 153)

项目 Item 细根 Fine root 根际土壤 Rhizosphere soil 平均值 Mean (mg·g-1) 标准偏差 Standard deviation (mg·g-1) 变异系数 Coefficient of variation (%) 平均值 Mean (mg·g-1) 标准偏差 Standard deviation (mg·g-1) 变异系数 Coefficient of variation (%) C 445.61 48.98 10.99 25.79 6.04 23.42 N 5.98 1.08 18.06 2.15 0.26 12.09 P 0.48 0.07 14.58 1.11 0.21 18.92 K 2.71 0.84 31.00 1.88 0.52 27.66 Ca 8.60 3.58 41.63 12.03 2.69 22.36 Mg 0.77 0.27 35.32 1.56 0.55 35.26 C:N 77.98 20.92 26.83 12.07 2.80 23.20 C:P 962.06 222.19 23.10 23.93 6.46 27.00 N:P 12.59 1.90 15.09 1.99 0.37 18.59