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poa sp
相关语句
  早熟禾
     , Poa sp.and Elymus sp.are very common, but the powdery mildew from R.
     、早熟禾一种(Poa sp.)
短句来源
     So spraying 0.3% B9 and 0.2% PP333 can increase drought resistance of Poa sp., also make sense in turf water-saving (irrigation. )
     因此 ,在早熟禾生长时期叶面喷施 0 3%B9与 0 2 %多效唑 ,可以提高早熟禾在干旱条件下的抗旱性。 对草坪节水灌溉也有重要意义
短句来源
     A New Disease Caused by Puccinia coronate Corda var. coronate on Poa sp. in Jilin Province
     吉林省的一种新病害——由冠柄锈菌引起的早熟禾锈病
短句来源
     The results showed that the relation of the species diversity of the plant communities and the Poa sp.dominance on harmful rats density in each correlation analysis were all closest,their correlative degrees were 0.823 and 0.886 respectively.
     分析结果表明,植物群落物种多样性和早熟禾优势度在各自的关联分析中对害鼠(高原鼠兔)密度的关联度分别是0.823和0.886。
短句来源
  相似匹配句对
     sp. ,L.
     、漂浮隔膜水母(L.neustonan.sp.)
短句来源
     sp. .
     sp.lilii Wang
短句来源
     THE STUDY ON ECOLOGICAL AND BIOLOGICAL CHARACTERISTICS OF AGROSTIS SP. AND POA CRYMOPHILA
     本特剪股颖与冷地早熟禾的生态生物学特性
短句来源
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The present paper deals with the studies of the host range of wheat rosette disease (northern ce-real mosaic virus)which is transmited by Laodelphax striatella. Diagnosis was made both withelectron-microscopic studies and biological assays. As a result, it was demonstrated that 12 speciesnamely: Eragrostis piloso (L) Beauv, Eragrostis cilianensis (All) Link, Eleusine indica (L)Gaerth, Chloria virgata Swartz, Avena sativa L, Setaria italics (L) Beauv, Setaria viridis (L)Beauv, Setaria luiesens (Weigel)F.T. Hubb,...

The present paper deals with the studies of the host range of wheat rosette disease (northern ce-real mosaic virus)which is transmited by Laodelphax striatella. Diagnosis was made both withelectron-microscopic studies and biological assays. As a result, it was demonstrated that 12 speciesnamely: Eragrostis piloso (L) Beauv, Eragrostis cilianensis (All) Link, Eleusine indica (L)Gaerth, Chloria virgata Swartz, Avena sativa L, Setaria italics (L) Beauv, Setaria viridis (L)Beauv, Setaria luiesens (Weigel)F.T. Hubb, Hordeum vulgare L. Triticum aestivum L. (Win-ter wheat and Spring wheat) Sorghum vulgare Pers. are hosts, while Oryza sativa L, Zea naysL, Lolium perenne L, Digitaria sanguinalis (L) Scop var.Ciliaris (Retz) Parl. and Gossypiumhirstum L. usually suspected to be hosts of the virus, was demonstrated as non-host. Echinochloacrusagalli (L) Beauv and Poa sp need further tests on their ausceptibity to the virus.

通过生物测试和电镜检查,明确小麦丛矮病的病毒感染寄主植物是小麦、春麦、燕麦、大麦、谷子、高粱、画眉草、大画眉草、牛筋草、狗尾草、金色狗尾草、虎尾草等十二种。非感染植物是水稻、玉米、毛马唐、黑麦草及棉花。稗草和早熟禾待进一步研究。

The results of greenhous inoculation indicate that 18 grass species dis-tributed over 6 genera except genus Triticum have been shown to be hosts of Blumeria graminis f.sp.tritici ( =Erysiphe graminis f.sp. tritici ) , Among them 1 7 species of 6 genera are new records of host of this fungus in China.Field survey shows that the occurrences, of powdery mildew on Roegneria ciliaris(Trin)Nevski, Bromus japonicus Thunb., Poa sp.and Elymus sp.are very common, but the powdery mildew from R.ciliaris...

The results of greenhous inoculation indicate that 18 grass species dis-tributed over 6 genera except genus Triticum have been shown to be hosts of Blumeria graminis f.sp.tritici ( =Erysiphe graminis f.sp. tritici ) , Among them 1 7 species of 6 genera are new records of host of this fungus in China.Field survey shows that the occurrences, of powdery mildew on Roegneria ciliaris(Trin)Nevski, Bromus japonicus Thunb., Poa sp.and Elymus sp.are very common, but the powdery mildew from R.ciliaris and B.japonicus cann't infect the wheat varieties which are very susceptible to E.g. f.sp. tritici.The ability of the powdrey mildew from P.sp.and E.sp.to infect these wheat varieties has not been determ-ined.The results of inoculation with isolates from Henan andShanxi province indicate that the susceptibility of one gerass species differs to different isolates.The role of wild gnass species which can be infected by B.g.f.sp.tritici inthe epidemic of wheat powdery mildew needs to be investigated in further studies.

温室接种试验证明,小麦白粉病能成功地侵染小麦属以外的6属18种禾草,其中6属17种为国内首次报道的该菌寄主。野外调查中发现,纤毛鹅观草(Roegneria ciliaris(Trin.)Nevski)雀麦(Bromus japonicusThunb.)、早熟禾一种(Poa sp.)和披碱草属一种(Elymus sp.)上的白粉菌发生严重,但室内试验证实前两种禾草上的白粉菌与小麦白粉病无关,后两种禾草上的白粉菌需进一步研究。用小麦白粉菌河南菌系和陕西菌系分别接种同一物种的禾草,所得结果不尽一致。关于野生禾草在小麦白粉病流行中的作用,尚需进一步研究。

Using a method of the principal components analysis we researched the succession of the plant communities damaged by the plateau zokors,and took classification of the plant communities.The results show that composition of the plant community is related to the density of zokors.Through ordination the quadrats are separted into four groups in two-dimensional space,they respectively indicate the different plant communities.The contents of the Elymus dahuricus and Stipa in these quatrats are a stan- dard to distinguish...

Using a method of the principal components analysis we researched the succession of the plant communities damaged by the plateau zokors,and took classification of the plant communities.The results show that composition of the plant community is related to the density of zokors.Through ordination the quadrats are separted into four groups in two-dimensional space,they respectively indicate the different plant communities.The contents of the Elymus dahuricus and Stipa in these quatrats are a stan- dard to distinguish different plant communities.With the increase of zodor density,the failing succession of the plant communi- ties develops along Kobresia humilis+stipa sp.+ Elymus dahuricus+Saussurea superba→Ajania tenuifolia+Elymus dahuricus +Taraxacum sp.+ Kobresia humilis→Potentilla anserina+Poa sp.→Potentilla anserina+Elsholtzia calycocarpa. On the basis of the correlation matrix analysis it is found that the distributions have intense repelling action between the fine forage grass and weeds.The correlation coefficient is smaller among the most of species.

本文采用主分量分析研究高原鼢鼠危害下的植物群落的演替及分类.结果表明:鼢鼠危害的程度严重影响着植物群落的组成,随着鼠密度的增高,植物群落沿矮嵩草+针茅+垂穗披硷草+美丽风毛菊群落→艾菊+垂穗披硷草+蒲公英+矮蒿草群落→鹅绒委陵菜群落(鹅绒委陵菜+早熟禾阶段→鹅绒委陵菜+萼果香薷阶段)的方向演替.

 
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