Study on evapotranspiration of three coldseason turfgrasses by using SPAC

The evapotranspiration dynamic of three coldseason turfgrasses (Lolium perenne, Poa pratensis, Festuca arundinacea) were studied in Beijing area using field test combined with laboratory analysis. The results showed that the evapotranspiration dynamic of 3 coldseason turfgrasses with 15 days interval kept a similar tendency. The evapotranspiration of L. perenne was higher than others except for the period from late April to early May. The evapotranspiration of 3 turfgrasses was obvious different among different seasons, the highest value appeared in mid June, and followed by that in late August and mid September, and the lowest value appeared before winter. The KC of L. perenne was the largest (1.03), and followed by F. arundinacea (0.89) and P. pratensis (0.87).