查询词典 Picea

The system of somatic embryogenesis and plantlet regeneration had been established in Picea meyeri Rehd.

本文以白杆的合子胚为材料，建立了体细胞胚胎发生及其植株再生系统。

The result of factor analysis can provide the changes of relative precipitation and temperature variations. In trace elements, Cu, As, Zn, Pb and Ni were apparently enrichmented in soil layers and are sensitive to climatic changes. Carbon isotope is more sensitive to climatic changes than that of oxygen isotope in loess stratigraphy. The heavy mineral are varified in the loess stratigraphy, but their content differences between loess and palaeosol is little. Though the palynologic analyses results reveal that pollens and spores are fewer in the loess stratigraphy, they differ greatly in loess layer and palaeosol layer not only in species but also in types, i. e., the pollens and spores indicating warm and moist climate, such as Lles, Podocarpus, Polopydium, Pteris grerilliana Wall, Pterocarya and Juglans appear in palaeosol layers, while those indicating cold and dry climate such as Ephedra, Artemisia, Chinopodiaceae, Picea and Abies exist mainly in loess layers. The pollen content of broad-leaved tree mainly consisting of Pterocarya is up to 60% in palaeosol 〓, while the content of Ephedra is more than 50% in 〓 loess layer, showing that the environment differed greatly when 〓 and 〓 were formed.

当然，常量元素氧化物的组合因子分析结果可提供相对降水与相对温度在剖面的变化，因而来反映气候状况更为理想；微量元素中Cu、As、Zn、Pb与Ni在成土过程中富集明显，亦较好地反映了气候变化；稳定同位素中的碳同位素比氧同位素更能敏感记录气候的变化；研究区黄土地层中重矿物种类较多，但黄土层与古土壤层中含量差异不大；孢粉分析结果揭示，尽管研究区黄土层中孢粉总量相对较为贫乏，但黄土层与古土壤层中孢粉种属相差较大：在古土壤层内出现了指示相对暖湿环境的冬青属、罗汉松属、水龙骨属、林下凤尾蕨、枫杨、胡桃等植物孢粉，而黄土层中麻黄、藜科、蒿属及冷杉、云杉含量较高。

On the basis of pollen analysis of surface sample in North China, polynomial function analysis method was applied to establish pollen climate response surface of Pinus, Betula, Quercus, Artemisia, Chenopodiaceae, Compositae, Picea, Ephedra, Gramineae in North China, therefore an easy and applicable method for reconstructing palaeoclimate and palaeoenvironment with data of fossil pollen was founded; Multi-analysis method was applied to analyse the principal elements of surface sample pollen in central Inner Mongolia Steppe, the assemblages of surface sample pollen in steppe area and its relationship with vegetation type were discussed with helps from spore-pollen analysis of a peat section in Chasuqi, Inner Mongolia and 〓C chronometer, fossil pollen data were obtained with high resolution on the peat section in Chasuqi. Vegetation succession and environmental changes since Holocene at resolution of 70 years were primarily reconstructed in south Mount Daqingshan and Plain Tumete. The changes in the area were copmared with those in the neighbouring areas during the same period. It was found that Holocene environmental change had undergone the following stages: cold-arid, temperate-wet, warm-wet, temperate-arid and cold-arid, and the climatical optimum period occurred in 5000-4100 aB.

本文在对中国北方表土花粉研究的基础上，采用多项式函数回归方法建造了中国北方松属、桦属、栎属、蒿属、藜科、菊科、云杉属、麻黄属、禾本科等的花粉——气候趋势面，从而为利用化石花粉资料直接恢复古气候、古环境提供了一种方便易行的方法；采用多元分析方法对内蒙古中部草原区表土花粉进行了主成分分析，探讨了草原区表土花粉组合的规律及与植被类型的关系；本文还应用孢粉分析方法，结合〓C测年技术，通过内蒙古中部察素齐泥炭剖面高分辨率的化石花粉数据，初步恢复了大青山山地南部及土默特平原地区分辨率为70年的全新世以来植被演替和环境变迁的状况，并与邻近地区的全新世古气候、古环境进行了对比研究，研究发现，本区域全新世古环境的变迁序列基本上可以与周围地区及华北地区进行对比，其环境变迁经历了凉干～温湿～暖湿～温干～凉干的变化，且气候最适宜期出现在5000～4100aB.P。

Langner working with Picea omorica, obtained results that may best be interpreted as a return to self-fertilization

研究塞尔维亚云杉的兰纳得到了最好看成是恢复自花受精的结果。

Based on synthetically analysis of ecological characteristics and dispersal of spruce pollen, the abundance of Picea is influenced by treeline moving upward, valley wind and glacier ablation.

通过对云杉属生态习性、传播特性等综合分析，认为剖面中的云杉丰值可能与林线上移、山谷风搬运以及冰川退缩等有一定的相关性。

Around 30 ka, taiga of dominant Picea coexisted with Larix, Pinus and Abies was distributed in both islands under relatively colder and drier climate than at present.

两个岛上3万年前后以云杉与落叶松共生的森林为主，松和冷杉出现在比现代相对较冷和干的气候条件下。

The Aesculus chinensis,Euptelea pleiospermum,Cercidiphyllum japonicum,Taxus chinensis,Picea brachytyla and Emmenopterys henryi Oliv compose and stand structure of were studied,and the comparability matrix among those main woods distribution were studied,and the protection propagation countermeasures were put forward.which are important for researching and protecting these rare woods in Fun...

经调查，基本摸清了国家保护植物七叶树林、领春木树林、连香树林、红豆杉树林、云杉树林、香果树林6种珍稀树种林分的组成与结构，研究了主要林分之间的相似性矩阵，同时提出了保护繁育对策，对开展研究和保护珍稀树种具有重要意义。

We took Picea mongolica forest in Baiyinaobao natural preserve InnerMongolia Autonomous Region as the research object,studied its environment,autecology,population ecology,community ecology,ecosystem ecology and socialecology systematically.

本文以内蒙古白音敖包自然保护区的沙地云杉林为研究对象，通过大量的野外调查、室内分析和资料收集，从保护生态学的观点出发，对沙地云杉林的环境、个体生态、种群生态、群落生态和生态系统生态以及社会生态进行了全面系统的研究。

The results indicated that the aqueous extracts from the litter of Picea schrenkiana had autotoxicity on its seed germination and seedling growth.

结果表明：天山云杉凋落物水浸提取液对其种子萌发和幼苗生长存在自毒作用。

These vegetation types are (1) Yushania niitakayamensis thicket (2) Juniperus squamata-Rhododendron pseudochrysanthum thicket (3) Abies Kawakamii forest (4) Tsuga chinensis forest (5) Abies Kawakamii-Tsuga chinensis forest (6) Picea morrisonicola forest (7) Chamaecyparis formosana forest (8) Pinus taiwanensis forest and (9) Evergreen broad-leaved forest.

使用双向指标种分析法与列表比较法将100个样区切分成9个植被类型，分别为玉山箭竹矮灌丛(6)、玉山圆柏-玉山杜鹃灌丛(3)、台湾冷杉林(7)、台湾铁杉林(3)、台湾冷杉-台湾铁杉林(9)、台湾云杉林(2)、桧木林(4)、台湾二叶松林(12)、针阔叶混合林(41)、常绿阔叶林(13)。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。