联合国政府间气候变化专门委员会(IPCC, 2007)指出, 伴随着全球变暖, 氮沉降的现象也日益加剧。 通过野外控制实验, 使用红外辐射器增温(+2　℃)和人工添加NH4NO3(+10 g N·m-2·a-1), 模拟未来气候变暖与氮沉降状态, 设计对照(CK)、 增温(IR)、 施氮(N)、 增温施氮(IRN)四种处理, 结合ICP-AES法研究气候变暖与氮沉降对传统蒙药材——阿给12种必需元素在生殖(营养)部位中分配的影响。 结果表明: 增温与施氮处理改变阿给对必需元素的吸收与分配。 增温条件下12种元素含量虽有波动, 但基本上呈现出负效应大于正效应的趋势。 施氮处理明显改善磷、 锰的吸收。 同时, 增温与施氮处理之间的交互作用不显著。 生殖枝与营养枝之间, 只有氮、 钾、 钙、 镁四种元素表现出显著性差异。

The UN Intergovernmental Panel on Climate Change (IPCC) pointed out that nitrogen deposition was being increasingly intensified along with climate warming. In this paper, we conducted a multi-factor experiment from 2005 using Artemisia frigida, a Mongolian traditional medicinal plant in Inner Mongolia steppe, to study the effect of simulated warming and nitrogen addition on 12 essential element contents and their allocation in reproductive branches (vegetative branches) by ICP-AES. The four treatments were: CK (ambient), IR (warming), N (nitrogen addition) and IRN (warming plus nitrogen addition). The simulated warming was 2 ℃, and the total amount of added NH4NO3 was 10 g N·m-2·a-1. In this study, our result showed that warming and nitrogen addition influenced the essential element absorption and distribution. Compared to ambient, there were different variations in 12 essential element contents at warming condition, but the negative effects were more than the positive effects. Nitrogen deposition significantly increased absorption of P and Mn, but no interactive effect of warming, Nitrogen deposition, and different part on all of 12 element contents. In addition, absorption and allocation of N, K, Ca and Mg were significantly different between reproductive branches and vegetative branches (P<0.05).