3种常见观赏草的持水性能比较

Comparison of Water Holding Capacities of 3 Normal Ornamental Grasses

以福州市比较常见的3种观赏草:银边沿阶草、鸢尾、金娃娃萱草作为研究对象,应用室内浸泡法分别测定3种观赏草的根、茎叶的吸水速率、持水率。结果表明:3种观赏草根、茎叶持水率存在显著差异(P<0.05)。在浸泡16 h时,持水率达到最大值,其中鸢尾根部的持水率最高,而茎叶持水率则以银边沿阶草最高。银边沿阶草不同部位的吸水速率均最高。3种观赏草随着浸泡时间的延长,持水率呈上升趋势,表现为极显著正相关;而吸水速率呈下降趋势,表现为负相关关系。3种观赏草均有良好的持水性能,可供城市园林造景和生态保护中应用。

3 common ornamental grasses Ophiopogon intermedius cv.Argenteo,Iris tectorum and Hemerocallis fuava in Fuzhou were studied and the soaking method was applied in determining the water-holding capacities of their roots , stems and leaves .The results showed that the water-holding rate about different parts of the grasses had significant differences (P<0.05).When soaked for 16 h, Iris tectorum was proved to have the highest water -holding rate in the root part ,Ophiopogon intermedius cv.Argenteo was proved to have higher warter-holding rate than other two ornamental grasses .Ophiopogon intermedius cv.Argenteo in stem and leaf parts showed higher water-absorbing rate than others .Ophiopogon intermedius cv.Argenteo in different parts showed the highest water-holding rate .The water-holding rates had positive correlation with the soaking time while the water-absorbing rate showed negative correlation when it showed the decreasing tendency .3 ornamental grass had good water-holding capacity .So they could be used for the urban landscaping and ecological protection .