遮阴对草地早熟禾和紫羊茅种子萌发特性的影响

Effects of shading on seed germination of Poa pratensis and Festuca rubra

以冷季型草坪草草地早熟禾(Poa pratensis)的优异(Merit)、新哥来德(Nu Glade)和肯塔基(K.B.G)3个品种和紫羊茅(Festuca rubra)的两个品种宝瑞(Boreal)和梦神(Rubra),共5个品种草坪草为研究对象,在人工遮阴控制下,对其耐阴性进行了比较,试验设置的遮阴处理分别是遮阴度22%、45%、66%、83%,以不遮阴的全光照为对照(CK)。结果表明,遮阴显著提高了各试验品种种子发芽率、发芽势(P<0.05),并且随遮阴度增加而增加;胚根长随遮阴增加而减小,而胚芽长度随遮阴增加而增长。

The present study evaluated the effects of shading on germination of different cultivars of Poa pratensis( Merit,Nu Glade and K. B. G) and Festuca rubra( Boreal and Rubra). The shading treatments including 22%,45%,66% and 83% of shading and no shading as control. The results showed that shading treatments significantly increased( P < 0. 05) the germination percentage,the germination power,the germination index and the vigor index which also increased with the increasing of shading. But the length of radicle decreased and the length of germ increased with the increasing of shading.