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对多年生黑麦草Lolium perenne,草地早熟禾Poa pratensis和苇状羊茅Festuca arundinacea3种冷季型草坪草生长季内在田间持水量(FC)30%~50%,50%~70%,70%~90%3个水分梯度下的地上生物量、再生速度及其坪用质量进行了田间测定。结果表明:3种草坪草在FC 30%~50%下的再生速度与50%~70%下的再生速度具有显著性差异,当FC 50%~70%时,再增加水分并不能显著增强草坪草的再生速率。多年生黑麦草、草地早熟禾、苇状羊茅整个试验期间的地上生物量干物质累积在FC 30%~50%,50%~70%之间差异显著,FC 50%~70%与70%~90%下的地上生物量累积差异不明显。3种草坪草叶片组织含水量随着水分梯度的增加而增大,叶片组织含水量对水分梯度的响应基本显著。方差分析结果表明,3种冷季型草坪草在不同的水分梯度下,其坪用质量具有差异显著性(P<0.05),灌水能显著提高草坪草的质量。但在FC 50%~70%的水分梯度下,3种冷季型草坪草都表现理想(得分>6.5)。
In the growing seasons of three perennial ryegrass Lolium perenne, Poa pratensis and Festuca arundinacea, the water holding capacity (FC) was 30% -50%, 50% -70%, 70% -90 Field measurements were performed on aboveground biomass, regeneration rate, and plateau mass using three water gradients. The results showed that the regeneration rate of the three turfgrasses was significantly different from that of the other turfgrass under the condition of FC 30% ~ 50% and the regeneration speed at 50% ~ 70%. When the FC 50% ~ 70%, the addition of water did not significantly enhance the turfgrass Grass regeneration rate. Above-ground biomass dry matter accumulation of perennial ryegrass, bluegrass and tall fescue was significant at FC 30% -50% and 50% -70%, with FC 50% -70% and 70% The above-ground biomass accumulation difference was not obvious at 90%. The leaf water content of three kinds of turf grass increased with the increase of water gradient, and the response of leaf tissue water content to water gradient was basically significant. Analysis of variance showed that the turfgrass quality of three cold-season turfgrasses was significantly different under different water gradients (P <0.05), and irrigation could significantly improve the quality of turfgrass. However, all the three cold-season turfgrasses performed well under the water gradient of 50% ~ 70% FC (score> 6.5).