Chin J Plan Ecolo ›› 2017, Vol. 41 ›› Issue (3): 311-324.DOI: 10.17521/cjpe.2016.0267

• Research Articles • Previous Articles     Next Articles

Effects of microorganism on carbon, nitrogen and phosphorus of Dodonaea viscosa and the soils from different elevations in Yuanmou, Yunnan, China

Xue-Mei WANG1,2, Bang-Guo YAN1,2,3, Guang ZHAO1,2, Liang-Tao SHI3, Gang-Cai LIU1, Hai-Dong FANG3,*()   

  1. 1Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu 610041, China

    2University of Chinese Academy of Sciences, Beijing 100049, China
    and
    3Institute of Tropical Eco-Agriculture, Yunnan Academy of Agricultural Sciences, Yuanmou, Yunnan 651300, China
  • Online:2017-03-10 Published:2017-04-12
  • Contact: Hai-Dong FANG
  • About author:

    KANG Jing-yao(1991-), E-mail: kangjingyao_nj@163.com

Abstract:

Aims Understanding the effects of soil microorganism at different elevations on plant C:N:P stoichiometry can help us to understand the plant-soil interactions in the context of climate change. Our aim was to quantify the independent and interactive effects of soil microbial communities and temperatures on the C, N, and P in the leaves of Dodonaea viscosa—a global widespread species. Methods Rhizosphere soils of D. viscosa were collected from two elevation zones in Yuanmou County, Yunnan Province. A 2 × 3 factorial experiment with six replications was conducted using climate chambers. The leaf C, N and P contents and the soil properties were measured after three months of the treatments. Important findings Compared with the autoclaved treatment, inoculated rhizosphere soils from both high and low elevations had higher nutrient absorption, especially P uptake. Temperature produced no significant effect on leaf C:N:P stoichiometry, but the interactive effect of temperature and microbial treatment appeared significant. For inoculated rhizosphere soils from high elevation, temperature had no significant effect on leaf C:N:P stoichiometry. For inoculated rhizosphere soils from low elevation, leaf N and P contents under low temperature were significantly lower than those with warmer soils. The promoting effect of soil microorganisms on nutrient uptake may be due to the direct effect of beneficial microorganisms (e.g., mycorrhizal fungi), but not through the alteration of nutrient cycling process. Because D. viscosa in the inoculated rhizosphere soils absorbed more N and P from the soil than those in autoclaved soil, the available N and P in inoculated rhizosphere soils were lower than those in autoclaved soils. As predicted future temperature will be lower in the studied region, the growth of D. viscosa may be negatively affected through plant-microbe feedbacks.

Key words: ecological stoichiometry, soil microorganisms, plant-soil feedback, climate change, Dodonaea viscosa