土壤氮磷添加下豆科草本植物生物固氮与磷获取策略的权衡机制

李强, 黄迎新, 周道玮, 丛山

Mechanism of the trade-off between biological nitrogen fixation and phosphorus acquisition strategies of herbaceous legumes under nitrogen and phosphorus addition

LI Qiang, HUANG Ying-Xin, ZHOU Dao-Wei, CONG Shan

表1 氮、磷添加及其交互作用影响的土壤有效氮、磷含量和有效氮磷比例(平均值±标准误)

Table 1 Effect of nitrogen (N) and phosphorus (P) addition and their interaction on available N and P concentration and available N:P ratio in bulk soil (mean ± SE)

处理 Treatment 有效氮 Available N (mg·kg-1) 有效磷 Available P (mg·kg-1) N:P Control 37.05 ± 0.50 5.08 ± 0.07 a 7.31 ± 0.13 c N 72.02 ± 1.15 a 5.11 ± 0.05 a 14.12 ± 0.25 a P 37.65 ± 0.64 b 9.36 ± 0.11 b 4.03 ± 0.07 d NP 71.91 ± 1.02 a 9.18 ± 0.09 b 7.84 ± 0.38 b