冷季型草坪草幼苗形态观测

试验观测了多年生黑麦草、紫羊茅、高羊茅分别与草地早熟禾混播建植的幼坪中的这4种冷地型草坪草种的生育期、株高、分蘖节须根数及主根顶端须根数以及播深等指标。草坪草苗期形态表现为一叶期到四叶期，之后进入分蘖期；随着发育进程，分蘖节须根数明显增加，而主根顶端须根数基本不变；从生长发育的速率来看，多年生黑麦草、紫羊茅的生长速率最快，高羊茅次之，草地早熟禾最慢。

Morphology of Seedling on Cold Season Turfgrass

The growth period, height, the numbers of roots at tiller node and sowing depth of Lolium perenne, Festuca arundinaeea, Festuca rubra and Poa pratensis were observed among their mixture turfgrass. The gramineae turfgrass seedling time was from emergence to four leaves stage then to the tiller, During growth period, there was obvious increase of the numbers of roots at tiller node, but the numbers of roots at embryo was invariant; It showed the nutrition absorption depended on the roots at tiller node. Seeds sowing in the same time, while sowing depth was not remarkable difference among the different growth period of turfgrasses; Seeds sowing in the same time, growth speed of Lolium perenne and Festuca rubra were the fastest, then Festuca arundinacea was medium, Poa pratensis was slow.