Ecological Research

, Volume 31, Issue 4, pp 579–587 | Cite as

Can litter addition mediate plant productivity responses to increased precipitation and nitrogen deposition in a typical steppe?

  • Yue Shen
  • Wenqing Chen
  • Gaowen Yang
  • Xin Yang
  • Nan Liu
  • Xiao Sun
  • Jishan Chen
  • Yingjun Zhang
Original Article

Abstract

Plant litter is a key component of grassland and plays a major role in terrestrial ecosystem processes. Global climate change has been shown to considerably alter litter inputs to soils, which may feed back to the grassland ecosystem responses to climate change. In order to explore whether litter addition could mediate above and belowground productivity responses to short-term increases in growing-season precipitation and nitrogen deposition, we conducted a two-year study on water, nitrogen and litter addition in Inner Mongolia grassland. After two years of treatments, our results showed that water, nitrogen, and litter addition increased aboveground biomass (AB) and belowground net primary productivity (BNPP). Besides, litter addition increased BNPP responses to water addition. These litter addition effects could be attributed to the influence of litter on soil moisture and soil nitrogen availability, ultimately increasing belowground water use efficiency (WUEBNPP) and plant nitrogen uptake (NUPBNPP). However, litter addition suppressed the aboveground biomass (AB) responses to nitrogen addition under ambient precipitation conditions by affecting soil moisture. In conclusion, our results suggest that ecosystem responses to short-term increases in growing-season precipitation and nitrogen deposition could be mediated by the increased litter input caused by climate change.

Keywords

Litter Global change Productivity Resource use efficiency Leymus chinensis 

Notes

Acknowledgements

This study was supported by Modern Agro-industry Technology Research System (CARS-35) and National Natural Science Foundation of China (31472137). We thank Professor Taogetao Baoyin and Inner Mongolia University for providing the experimental facilities.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

11284_2016_1368_MOESM1_ESM.docx (175 kb)
Supplementary material 1 (DOCX 174 kb)

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Copyright information

© The Ecological Society of Japan 2016

Authors and Affiliations

  • Yue Shen
    • 1
  • Wenqing Chen
    • 2
  • Gaowen Yang
    • 3
  • Xin Yang
    • 1
  • Nan Liu
    • 1
  • Xiao Sun
    • 3
  • Jishan Chen
    • 1
    • 4
  • Yingjun Zhang
    • 1
  1. 1.Department of Grassland ScienceChina Agricultural UniversityBeijingChina
  2. 2.Department of Grassland ScienceNorthwest A&F UniversityYanglingChina
  3. 3.College of Agro-grassland ScienceNanjing Agricultural UniversityNanjingChina
  4. 4.Institute of Prata Cultural ScienceHeilongjiang Academy of Agricultural ScienceHarbinChina

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