After the analysis of morphological variation of P.pratensis is SYRRL,it can be divided by three types:Jiuzhi type,Dari type and Maqin type.

对三江源区草地早熟禾种群形态差异的分析，可将5个地区的草地早熟禾分为久治型、达日型和玛沁型。

The Poa pratensis is graminaceous rhizome needle grass,its rhizome are very stronger,the nutrition value is very higher.Now it is used as grass seed to conserve water and soil,graze and mow grassland and degraded grassland restoration.

草地早熟禾为禾本科多年生根茎下繁草，根茎发达，营养价值丰富，常被作为水土保持草种、放牧及刈割草场草种、草地退化恢复的先锋草种。

The P.pratensis community is in the phase of herbs and forbs of degraded alpine meadow.At the same time the P.pratensis population is in the dominant spices position,subordinate spices position and company spices position.So,we can replant P.pratensis and other grass seed to change the structure and composition of plant community,improve community environment,cause it to develop to subclimax community succession,reach the stabler state.We can apply fertilizer,improve soil nutrition condition,enable degraded grassland with the link of soil and vegetation system together to reach the stabler subclimax and climax state.

草地早熟禾群落处于高寒草甸退化的禾草杂类草阶段，草地早熟禾种群在群落中处于优势种地位、次优势种地位和伴生种地位，因此，可通过补播草地早熟禾和其他禾草草种，改变植物群落结构和组成，改善群落环境，使其向亚顶级群落演替，达到较稳定的状态；也可通过撒施肥料，改善土壤养分状况，使土壤与植被系统共同作用将退化草地演替为较稳定的亚顶级或顶级状态。

The principal factors of P.pratensis geographical distribution is organic material、organic carbon and total phosphorus,the chemical factor is the Ph value.The type of distribution of P.pratensis in the SRYYL is P.pratensis+ Geranium spp.,P.pratensis+Elymus nutans,Potentilla anserina+P.pratensis, Ligularia virgaurea+P.pratensis,P.anserina+ Aconitum tanguticum+P.pratensis, Deyeuxia spp.+P.pratensis,E.nutans+P.pratensis, Carex moocroftii+P.pratensis,P.pratensis+Capsellabursa-pastoris,P.anserina+L.virgurea,P.pratensis+ Polygonum sibiricum,P.fruticosa+ Scirpus distigmaticus.

对三江源区草地早熟禾种群调查，主要分布的草地类型有：草地早熟禾+老鹳草草地型，草地早熟禾+垂穗披碱草草地型，鹅绒委陵菜+草地早熟禾草地型，黄帚橐吾+草地早熟禾草地型，鹅绒委陵菜+唐古特乌头+草地早熟禾草地型，野青茅+草地早熟禾草地型，垂穗披碱草+草地早熟禾草地型，青藏苔草+草地早熟禾草地型，草地早熟禾+荠草地型，鹅绒委陵菜+黄帚橐吾草地型，草地早熟禾+西伯利亚蓼草地型，金露梅+双柱头镳草草地型。

The results showed that soil copper contamination did not significantly affect the leaf growth of Bermuda grass and its influence on root biomass and leaf chlorophyll content in Bermuda grass were also less than that in zoysiagrass.

结果表明：铜污染处理对狗牙根草坪的地上部分叶片生长量的影响不显著，对根系生长量和叶绿素含量的影响也明显小于结缕草；铜污染处理未引起冷季型草坪的叶绿素含量的下降，对高羊茅草坪的密度影响不显著，对叶片生长量的影响也明显小于草地早熟禾和多年生黑麦草，而草地早熟禾虽然叶片生长受到了严重的抑制，但根系生长未受到显著影响，也表现出了对土壤铜污染的一定的耐性。

The introduction adaptation of Kentucky bluegrass varieties in Beijing is summarized. Indices including growing habit, turf quality, turf duration, winter and summer survival, disease resistance were analyzed.

该文根据3a多的试验，分析了草地早熟禾的生长特征和特性，以及形成草坪的质量、持续年限、越冬越夏性和抗病性等结果表明，草地早熟禾各品种差异十分明显，大多数品种比较适宜北京种植。

The wholecharacteristic behavior of kentucky bluegrass is better than that of tall fescue and perennial ryegrass; while tall fescue is better than perennial ryegrass.

关联度分析结果表明，草地早熟禾的整体坪用性状表现要比高羊茅和多年生黑麦草好，而高羊茅比多年生草地早熟禾好。

The whole characteristic behavior of kentucky bluegrass is better than that of tall fescue and perennial ryegrass; while tall fescue is better than perennial ryegrass.""""

关联度分析结果表明，草地早熟禾的整体坪用性状表现要比高羊茅和多年生黑麦草好，而高羊茅比多年生草地早熟禾好。

Transformation of glucose oxidase gene from Aspergillus niger into Kentucky bluegrass Abstract Kentucky bluegrass Poa pratensis L.

黑曲霉葡萄糖氧化酶基因转化草地早熟禾的研究摘要草地早熟禾Poa pratensis L。

The published Kentucky bluegrass transformation system has many disadvantages including the diffculty of regeneration, high frequency of somaclonal, long-time transformation period and low efficiency of transformation.

现有的草地早熟禾遗传转化体系存在着植株再生困难、体细胞无性系变异发生频率高以及转化周期长、效率低等缺点，严重制约了早熟禾基因工程育种研究的发展。