I apo0logise that this presentation was delivered last week but the full written paper has received ROI approval.

We partitioned the components of ecosystem carbon balance the C4 plant Bermuda grass (Cynodon dactylon L.) growing in mesocosms irrigated every 1, 3, and 6 days with a constant amount of water to return the mesocosms to field capacity. We showed that, with increasing water deficit, cumulative soil respiration remained the same but the proportion attributable to soil organic matter decompisition decreased and the proportion attributable to root respiration increased. The findings are part of the PhD thesis by Yuan Li and are helpful for interpreting the response of changes in soil organic carbon stocks in relation to irrigation management.