践踏对野生结缕草品系外观质量的影响

Effects of Different Trample on Turf Intenstity Quality of Wild Zoysia

为了了解一种野生结缕草(Wild Zoysia)的耐践踏性,采用湖南省普遍用于运动场的草种——杂交狗牙根[天堂草328(Tifgreen)]为对照,研究践踏对它们外观质量的影响。结果表明:野生结缕草的叶片宽度、盖度、密度大于杂交狗牙根,但相同鲜叶重的叶绿素含量小于杂交狗牙根。两种草坪草在不同践踏处理之间的叶绿素含量均达极显著差异水平(P>0.01),但盖度、质地和密度差异因草种而异。践踏对杂交狗牙根的色泽、盖度影响较大,对其叶片质地和密度影响较小;重度践踏对野生结缕草色泽、叶片质地和密度影响较大,轻度践踏对野生结缕草各形态指标影响较小,甚至有利于该草坪草的分蘖生长及叶绿素含量的积累,说明该野生结缕草对践踏胁迫的适应性较强,比杂交狗牙根具有更强的耐践踏性,具有较高的开发利用价值。

Tramp-tolerance characters of wild zoysia and tifgreen （CK） were evaluated under different trample intensity. Results showed that leaf blades, coverage and density of wild zoysia higher than those of tifgreen, but the chlorophy Ⅱ content was lower. The content of chlorophy Ⅱ of tifgreen and wild zoysiz had significant difference （ P 〈 0. 01 ） with different trample intensity treatments, while coverage, texture and density varied with species. The results also showed that the color and cover rate of tifgreen were affected seriously at trampling intensity, while texture and density were affected lightly. The color, coverage and density changed little under light trampling intensity, which could improve the tiller growth and accumulate the chlorophy Ⅱ of wild zoysia. It indicated that wild zoysia has the higher turf quality and tramp tolerance characters than tifgreen.