关键词: 增温, 增雨, 营养元素, 分配规律, 冷蒿(Artemisia frigida Willd.)

Abstract: In order to reveal the effects of temperature and precipitation increasing on 12 nutrient element contents of different parts (reproductive branches and vegetative branches) in Artemisia frigida Willd.,a field experiment with four treatments,including CK(ambient),IR(+2℃),W(+120mm),IRW(+2℃ and +120mm),was conducted.The experiment was started in April 2005 and harvested in August 2010.12 nutrient element contents of different branches were determined by using ICP AEP.The results showed that W altered significantly the contents and allocation of N,K,Mg,Zn,Fe,Mn and Ni in different parts of Artemisia frigida (P<0.05)comparing to CK,but IR did not affected on all of 12 elements.There was no interactive effect among IR,W and different part on all of 12 element contents.In addition, there was a significant difference on the absorption and allocation of N, K, Mn (P<0.05). The results indicated that long term temperature and precipitation increasing by changing soil moisture, temperature, nutrient status and plant phenology, affected directly or indirectly plant nutrient elements absorption and allocation process.

Key words: Temperature increasing, Precipitation increasing, Nutrient element, Allocation regular, Artemisia frigida Willd