祁连山狼毒（Stellera chamaejasme）叶片生态化学计量特征对海拔的响应

苏昊海, 张小芳, 牛亚琳, 王海茹, 曹建军

Effects of altitude on leaf ecological stoichiometry of Stellera chamaejasme in the Qilian Mountains

Haohai Su, Xiaofang Zhang, Yalin Niu, Hairu Wang, Jianjun Cao

表1 研究区土壤养分含量、年平均气温和年平均降水量及海拔对土壤养分的影响

Table 1 Soil nutrient content，mean annual temperature and mean annual precipitation in the study area and effects of altitude on soil nutrients

指标 海拔/m F P df 2 400 2 600 2 800 3 000 3 200 SOC/（g·kg-1） 13.64±0.40c 29.67±1.40b 15.08±0.55c 15.23±0.63c 35.60±2.45a 36.01 0.0000 4 STN/（g·kg-1） 1.67±0.24c 2.74±0.96b 1.62±0.34c 1.73±0.55c 3.48±0.97a 38.00 0.0000 4 STP/（g·kg-1） 0.50±0.02b 0.55±0.01a 0.44±0.02c 0.37±0.01d 0.53±0.02ab 31.05 0.0000 4 SOC:STN 8.21±0.13d 10.33±0.22a 9.40±0.18bc 9.02±0.25cd 10.08±0.25ab 10.05 0.0000 4 SOC:STP 28.09±1.32c 53.59±2.43b 35.48±1.77cd 41.94±1.69d 67.50±3.83a 20.02 0.0000 4 STN:STP 3.43±0.17c 4.96±0.15b 3.77±0.17c 4.71±0.18b 6.70±0.34a 21.57 0.0000 4 LONG 100°21′55″ 100°17′15″ 100°14′28″ 100°14′26″ 100°22′35″ — — — LAT 38°37′05″ 38°33′43″ 38°33′09″ 38°33′22″ 38°38′15″ — — — MAT/℃ 2.11 1.02 -0.07 -1.17 -2.28 — — — MAP/mm 307.08 334.37 358.55 382.25 401.77 — — —