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冰缘地区
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  periglacial area
     Meiotic chromosome numbers are determined for fifty-eight species of the pernnialherbceous angiosperm in alpine periglacial area of the North-East Qinghai-XizangPlateau and neighbor lower altitude area.
     对青藏高原东北部高山冰缘地区和相邻低海拔地区59种多年生草本被子植物进行了染色体计数。
短句来源
     l. ,the polyploid frequency are 55. 6% -70. 4%. 2. Most of the neopolyploidscorrelated always with endemic taxa (included endemic genus,endemic subgenus and endemic species)in alpine periglacial area.
     4000-5200m以上的高山冰缘地区,多倍体频率达55.6%-70.4%.(2)高山冰缘地区新多倍体较多,并且与青藏高原上特有的植物类群(特有属、亚属或特有种)相关联。
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     The results indicate that chemical weathering of rocks on the earth surface in the Gread Wall Station area is relatively strong from 4000 to 3000aBP, which is suggestive of a comparatively warm period, and this warm period is also imprinted in some sedimental records such as lake and marine sediments. It is proved that palaeogoe sediments can be regarded as a new geological carrier by which we can research palaeoenvironmental evolution history in the ice-free and periglacial area, Antarctica.
     结果表明 ,距今 40 0 0— 30 0 0年长城站区地表岩石化学风化作用较强烈 ,处于一个相对温暖的时期 ,这与湖泊沉积物、海洋沉积物等古环境记录载体的研究结果是一致的 ,证明古海蚀龛沉积可以作为研究南极无冰区和冰缘地区古环境演化历史的一种新的地质载体。
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  “冰缘地区”译为未确定词的双语例句
     The Problems to Destroy Geology of Subgrade in Frost Area
     冰缘地区破坏路基的环境地质问题
短句来源
     The forma-tion age of the Xining loess is about 1. 2 Ma B. P. The Xining loess originated mainly from ice sheet, glacier and periglacial district ofQuaternary in Qinghai-Tibet Plateau.
     本区黄土主要来源于青藏高原第四纪局部冰盖、冰川及其外围广大冰缘地区所产生的粉砂物质。 西宁大墩岭黄土剖面详细地记录了1.2MaB·P.
短句来源
     The paper discussed problem of geology calamity in frost area,and put forward relevant prevention and cure measure.
     本文论述了冰缘地区几个重要环境地质问题给路基建设和养护带来的地质灾害 ,并提出了相应的防治措施
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     Crushed rock layers are distributed widely in periglacial environment.
     碎石层在冰缘地区有广泛分布.
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  相似匹配句对
     Characteristics of Periglacial Landforms in Bogda Area, Tian Shan
     天山博格达峰地区现代冰缘地貌特征
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     A Study on Cryergic in Middle Inner Mongolia
     内蒙古中部地区冰缘研究
短句来源
     Regional Construction
     地区建造
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     regional blockade;
     地区封锁;
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     PERIGLACIAL LANDFORMS OF THE CHANGBAI SHAN
     长白山冰缘地貌
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  periglacial area
Sediments from maar lakes in the periglacial area were analysed to obtain information about the limnetic fauna of Pleniglacial lakes.
      


Meiotic chromosome numbers are determined for fifty-eight species of the pernnialherbceous angiosperm in alpine periglacial area of the North-East Qinghai-XizangPlateau and neighbor lower altitude area. The chromosome numbers include counts forforty-five species that have not previously been investigated cytologically. The polyploidy are analysed and studied for the plants distributed on periglacial area and lower different altitude area below periglacial area. The result as follow t 1. The frequency of polyploid...

Meiotic chromosome numbers are determined for fifty-eight species of the pernnialherbceous angiosperm in alpine periglacial area of the North-East Qinghai-XizangPlateau and neighbor lower altitude area. The chromosome numbers include counts forforty-five species that have not previously been investigated cytologically. The polyploidy are analysed and studied for the plants distributed on periglacial area and lower different altitude area below periglacial area. The result as follow t 1. The frequency of polyploid inceases with a rise of altitude for pernnial herbceous angiosperm in North-EastQinghai-Xizang Plateau, in the forest area between 2000- 3000m a. s. 1., 29. 4% - 47.1 % are the percentage of polyploid;in the bush-meadow area between 3000-4000m a.s. 1.,polyploid percentage is 33. 3% - 53. 3% ;in the alpine periglacial area above 40005200m a. s. l.,the polyploid frequency are 55. 6% -70. 4%. 2. Most of the neopolyploidscorrelated always with endemic taxa (included endemic genus,endemic subgenus and endemic species)in alpine periglacial area. 3. The polyploid widespread species distributedto periglacial area are usually early polyplod of more primitive taxa,probably they hadalredy been produced and had alredy been divided into some ecological type before theQinghai-Xizang Plateau was rised. After the plateau had been intensely rised and preiglacial environment had been formed,the ecological types which laid stress on adaptingto propagation mechanism (r-type selective mechanism) have pioneered new habitat inthe periglacial area of Qinghai-Xizang Plateau,anothe ecological types which deperdedon adapting to nutritive growing preponderance (k-type selective mechanism) havewildely destributed in the mature stable habitat of other area. 4. Below to palaeopolyploid or secondary polyploid, that originated in forest flora of the Chinese southwestmoutains and Qin Ling and North China,then have spread towards the edge of the Qinghai-Xizang Plateau.

对青藏高原东北部高山冰缘地区和相邻低海拔地区59种多年生草本被子植物进行了染色体计数。其中,45个种的染色体记数为首次报道,并确定其信性.对分布于高山冰缘地区和冰缘以下不同海拔地区植物染色体的多倍性进行分析研究,结果如下:(1)多年生草本被子植物多倍体频率随海拔高度上升而增加:海拔2000-3000m,多倍体频率为29.4%-47.1%.3000-3800(4000)m(高寒灌丛-草甸区),多倍体频率为33.3%-53.3%;4000-5200m以上的高山冰缘地区,多倍体频率达55.6%-70.4%.(2)高山冰缘地区新多倍体较多,并且与青藏高原上特有的植物类群(特有属、亚属或特有种)相关联。(3)分布在冰缘地区的多倍体广布种,通常都是较原始类群的古多倍体,它们可能在青藏高原强烈隆升以前就已经形成,并分化出许多生态型,在高原强烈隆升并出现高山冰缘环境以后,某些生态型突出繁殖适应机制(r型选择机制),能开拓新生境而在新出现的严酷而不稳定的冰缘地区繁衍,其它一些生态型则依靠营养生长优势(K型选择机制)广泛分布在其稳定、成熟的生境中.(4)冰缘...

对青藏高原东北部高山冰缘地区和相邻低海拔地区59种多年生草本被子植物进行了染色体计数。其中,45个种的染色体记数为首次报道,并确定其信性.对分布于高山冰缘地区和冰缘以下不同海拔地区植物染色体的多倍性进行分析研究,结果如下:(1)多年生草本被子植物多倍体频率随海拔高度上升而增加:海拔2000-3000m,多倍体频率为29.4%-47.1%.3000-3800(4000)m(高寒灌丛-草甸区),多倍体频率为33.3%-53.3%;4000-5200m以上的高山冰缘地区,多倍体频率达55.6%-70.4%.(2)高山冰缘地区新多倍体较多,并且与青藏高原上特有的植物类群(特有属、亚属或特有种)相关联。(3)分布在冰缘地区的多倍体广布种,通常都是较原始类群的古多倍体,它们可能在青藏高原强烈隆升以前就已经形成,并分化出许多生态型,在高原强烈隆升并出现高山冰缘环境以后,某些生态型突出繁殖适应机制(r型选择机制),能开拓新生境而在新出现的严酷而不稳定的冰缘地区繁衍,其它一些生态型则依靠营养生长优势(K型选择机制)广泛分布在其稳定、成熟的生境中.(4)冰缘以下地区的多倍体特有种多数属于古多倍体或次生多倍体.它们多数可能是由西?

Based on the analyzed results of paleomagetic measurement, susceptibility, grainsize, heavy mineral and the surface texture of quartz sand in loess, the authors conclude thatthe Xining loess stratigraphy possesses continuous loess-paleosol sequence from S_0 to L_(17),which consisted of Holocene loess, Malan loess, Lishi loess and Wucheng loess. The forma-tion age of the Xining loess is about 1. 2 Ma B. P. The Xining loess originated mainly from ice sheet, glacier and periglacial district ofQuaternary in Qinghai-Tibet...

Based on the analyzed results of paleomagetic measurement, susceptibility, grainsize, heavy mineral and the surface texture of quartz sand in loess, the authors conclude thatthe Xining loess stratigraphy possesses continuous loess-paleosol sequence from S_0 to L_(17),which consisted of Holocene loess, Malan loess, Lishi loess and Wucheng loess. The forma-tion age of the Xining loess is about 1. 2 Ma B. P. The Xining loess originated mainly from ice sheet, glacier and periglacial district ofQuaternary in Qinghai-Tibet Plateau. Dadunling loess profile in Xining recorded rich information of environment changes inQuaternary, among which the aeolian sand layers in L_2 and L_(15) loess reflected the coldest anddriest periods and paleosolS_1, S_3 and S_4 might reflect the warmest and moistest periods inXining area since 1. 2 Ma B. P.

根据古地磁、磁化率、粒度和重矿物分析及电镜扫描石英砂表面特征等测试手段的综合研究,西宁地区的黄土可分出从S_0至L_(17)的连续黄土——古土壤序列。它包括全新世黄土、马兰黄土、离石黄土和午城黄土,形成的时间为1.2MaB·P.。黄土粒度粗,且含有两个风成细砂分层。重矿物以不透明矿物、角闪石为主,次为绿泥石、锆石和金红石等。石英砂颗粒以次棱角状为主,其次为棱角状。石英砂表面机械结构中有众多的冰川作用痕迹和风力作用痕迹。本区黄土主要来源于青藏高原第四纪局部冰盖、冰川及其外围广大冰缘地区所产生的粉砂物质。西宁大墩岭黄土剖面详细地记录了1.2MaB·P.的环境变化信息。其中1.1MaB·P.形成的L_(15)顶部的细砂分层代表1.2Ma以来最为干冷的严酷时期。L_1和L_2是末次冰期和倒数第二次冰期的产物。倒数第二次冰期比末次冰期更为干冷,极盛时期为0.155MaB·P.。S_1S_3和S_4可能代表1.2Ma以来本区最为温暖湿润的时期。

The karyotypes of three endemic species for Ranunculaceae in alpine periglacial area of Qinghai Xizang Plateau are analysed and represented in this paper.Their karyotype formulae (K) (by Levan et al.,1964) and chromosome component of relative length (C.R.L.) (by Kuo et al.,1972) and the index of karyotypic asymmetry (As.K%) (by Arano H,1963) are each presented as folows: Trollius pumilus var. taguticus K(2n)=6m+8sm(2SAT)+2st,C.R.L.=4L+4M 2+4M 1+4S,As.K%= 63.57 ,the karyotype belong to 2B; Aconitum...

The karyotypes of three endemic species for Ranunculaceae in alpine periglacial area of Qinghai Xizang Plateau are analysed and represented in this paper.Their karyotype formulae (K) (by Levan et al.,1964) and chromosome component of relative length (C.R.L.) (by Kuo et al.,1972) and the index of karyotypic asymmetry (As.K%) (by Arano H,1963) are each presented as folows: Trollius pumilus var. taguticus K(2n)=6m+8sm(2SAT)+2st,C.R.L.=4L+4M 2+4M 1+4S,As.K%= 63.57 ,the karyotype belong to 2B; Aconitum tanguticum K(2n)=6m+10sm,C.R.L.=4L+8M 1+4S,As.K%=62.54,belong to 2B; Delphinium candelabrum var. monanthum K(2n)=6m+8sm+2st,C.R.L.=4L+4M 2+2M 1+6S,As.K%=64.34,belong to 3B.Make a comparison for these data with availeble information of close related species,may be show that the karyotypic asymmetry and evolution level of the Trollius pumilus var. tanguticus are lower than T.chinensis ,the karyotypic asymmetry and evolution level of the Aconitum tanguticum are the lowest in its close related taxa (Sect. Aconitum ),the karyotypic asymmetry and evolution level of the Delphinium condelabrum var. monanthum are lower than D.kamaoense var. glabescens and D.maximorwiczii and D.caeruleum that have reported in Sect. Delphinastrum .Above outcome is keeping with the classificatory position of these species in taxonomic system of Chinese Ranunculaceae by W.T.Wang (1979).

对青藏高原高山冰缘地区毛茛科3种特有植物的核型进行了分析。它们的核型公式(K)、染色体相对长度组成(C.R.L.)和核型不对称系数(As.K%)分别为:青藏金莲花Troliuspumilusvar.tanguticus:K(2n)=6m+8sm(2SAT)+2st,C.R.L.=4L+4M2+4M1+4S,As.K%=63.57,核型属2B型;甘青乌头Aconitumtanguticum为K(2n)=6m+10sm,C.R.L.=4L+8M1+4S,As.K%=62.54,2B型;单花翠雀花Delphiniumcandelabrumvar.monanthum为K(2n)=6m+8sm+2st,C.R.L.=4L+4M2+4M1+6S,As.K%=64.34,属3B型。经同相关近缘种核型资料比较,青藏金莲花核型不对称性和进化程度比金莲花T.chinensis低;甘青乌头的核型不对称性和进化程度在其近缘类群(乌头组Sect.Aconitum)已报道的种之内最低;单花翠雀花核型不对称性和进化水平比翠雀组(Sect.Delphinastrum)已报道的展毛翠雀花D.kamaoensevar.glabres...

对青藏高原高山冰缘地区毛茛科3种特有植物的核型进行了分析。它们的核型公式(K)、染色体相对长度组成(C.R.L.)和核型不对称系数(As.K%)分别为:青藏金莲花Troliuspumilusvar.tanguticus:K(2n)=6m+8sm(2SAT)+2st,C.R.L.=4L+4M2+4M1+4S,As.K%=63.57,核型属2B型;甘青乌头Aconitumtanguticum为K(2n)=6m+10sm,C.R.L.=4L+8M1+4S,As.K%=62.54,2B型;单花翠雀花Delphiniumcandelabrumvar.monanthum为K(2n)=6m+8sm+2st,C.R.L.=4L+4M2+4M1+6S,As.K%=64.34,属3B型。经同相关近缘种核型资料比较,青藏金莲花核型不对称性和进化程度比金莲花T.chinensis低;甘青乌头的核型不对称性和进化程度在其近缘类群(乌头组Sect.Aconitum)已报道的种之内最低;单花翠雀花核型不对称性和进化水平比翠雀组(Sect.Delphinastrum)已报道的展毛翠雀花D.kamaoensevar.glabrescens、?

 
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