PROGRESS IN GEOGRAPHY ›› 2004, Vol. 23 ›› Issue (3): 74-81.doi: 10.11820/dlkxjz.2004.03.010

• Original Articles • Previous Articles     Next Articles

Review about the Carbon Cycle Researches in Grassland Ecosystem

GENG Yuanbo, QI Yuchun, DONG Yunshe   

  1. Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101,China
  • Received:2004-02-01 Revised:2004-04-01 Online:2004-05-25 Published:2004-05-25


The some major research field of the carbon cycle in grassland ecosystem are reviewed that, and some problems are put forward about these researches. These reviews are focused on as follows: 1. The carbon storage in grassland ecosystem, which include the carbon storage in plant carbon pool and soil carbon pool;the distribution and measure on NPP and biomass in grassland. 2. The soil respiration in grassland, it was considered the most important process in the carbon cycle in grassland. 3. The effect of the climate and human activity such as reclamation,graze and fire, upon the carbon cycle in grassland. 4. The potential effect of increasing carbon dioxide in atmosphere on the carbon cycle in grassland. Some major problems are as follows: 1. The measure method and the origin of the data of carbon storage and flux for contrast and statistical analysis in worldwide grasslands are different; 2. It is very difficult distinguishing the four process of soil respiration, namely, three biological process, including soil microbial respiration, root respiration and soil animal respiration, and one abiological process, thus the effect of each process on carbon flux is not very clear; 3. The research on the effect of human activity on carbon cycle in grassland should be intensified.

Key words: carbon cycle, grassland ecosystem, soil respiration