The most economical irrigation amount and evapotranspiration of the turfgrasses in Beijing City, China

Under different water conditions the evapotranspiration (ET) of Kentucky bluegrass, tall fescue, perennial ryegrass, buffalograss, Japanese lawngrass and Bermudagrass were studied in the field using the microlysimeter method. The results indicated that the ET of six turfgrasses was mainly influenced by turfgrass species, and affected by water condition too. Then the consumed water of turfgrass was valued by comparing its crop coefficient (Kc) with that of the popular crops in Beijing. The most economical irrigation amount of six turfgrasses in Beijing City was estimated according to ET which was determined in this experiment and annual precipitation, and they are: tall fescue (391.8 mm) > Kentucky bluegrass (368.3 mm) > perennial ryegrass (315.1 mm) > Bermudagrass (300.7 mm) > buffalograss (184.0 mm) > Japanese lawngrass (110.5 mm). At last water conservation capacity of the turfgrass in Beijing City was estimated too.