水分对三种冷季型草坪草地上生物量的影响

Effect of Soil Water on Biomass of Three Cold-season Turfgrass

研究水分处理对三种草坪草高羊茅、草地早熟禾和多年生黑麦草地上生物量、草坪草再生速度及其叶片含水量的影响情况。结果表明:随着水分的增加三种草坪草在同一时期地上生物量随之增大,三种草坪草的再生速度也随着水分增加而增大,但B3与B4的差异不显著,表明水分过多并不能显著增加其再生速度。三种草坪草的叶片含水大小依次为高羊茅>多年生黑麦草>草地早熟禾。

Aboveground biomass, regeneration rate and the water content of perennial ryegrass, Kentucky bluegrass and tall fescue under different soil moisture gradient were measured under field conditions. The results showed that the content of aboveground biomass accumulation of the three cold season turgrass at the same period were increased along with the increasing of water content. With the increasing of irrigation quota, the regeneration rate of three turfgrass raised.When the soil moisture gradient was B3 and B4, the regenerate rate of the three kinds of cold season turfgass couldn＇ t increase observably along with the enhance of soilmoisture gradient, their water content of leaves were in turn tall Fescue 〉 Perennial Ryegrass 〉 Kentucky Bluegrass.