亚热带湿润区野生草地早熟禾生长特性及坪用价值研究

Study on Growth Characteristics and Turf Quality of Wild Poa pratensis Populations in Subtropical Humid Area

以午夜（Midnight）和巴润（Baron）草地早熟禾品种为对照，于2005～2007年对源自西南地区13份野生草地早熟禾的生长适应性及坪用价值进行研究，结果表明：①不同野生草地早熟禾地上茎生长速度差异极显著（P〈0．01），其中，05P13生长最快，为3．98mm／d；05P06最慢，仅为0．12mm／d；单株总分蘖数变异范围为38．0～161．33蘖/株；地下根茎生长表现为强、中、弱三类。②根据“五分制”草坪质量评价体系对供试材料坪用价值进行综合评价。其中，CK1和05P04全年综合得分最高，皆为4.25分，总体表现为草坪颜色蓝绿，密度大，形成的草坪均匀一致，抗病性和耐热性均较好；表现较好的有05P03和05P06，得分为4分；05P02和05P07表现最差，得分仅为2．75分和3．125分，其余材料表现中等。

The growth rate was significantly （ P 〈 0.01） different among the tested P. pratensis populations. The highest was 05P13 （3.98 mm/d） ; the lowest was 05P06 （0.12 mm/d）. The total tiller number among the tested P. pratensis varied from 38.0 to 161.33 tillers/plant. The rhizome characteristics were divided into 3 groups by cluster analysis method based on rhizome number, rhizome length and rhizome diameter parameters, and the 15 materials were classified by strong, medium and weak rhizome types. Take 8 indices about texture, density, uniformity, color, maturate time, green period, rust disease resistance and heat resistance to comprehensively evaluate turf characters, the results indicated that the maximum comprehensive value evaluated on turf characters included CK1 （4.25） and 05P04 （4.25）, the minimum included 05P02 （2.75） and 05P07 （3.13） because of weak rust disease resistance and heat resistance and the others were medium.