植物群

In this research, swainsonine contents of three Oxytropis species were determined by the high performance liquid chromatography coupled to mass spectrometry. The population genetic diversity was also studied and the swainsonine related molecular markers were screened by ISSR. In vitro fungi cultures from the individual plant of O. glabra were performed and microbiological morphology of the colony and the conidiophore were investigated. The 5.8S rDNA/ITS sequences of fungi amplified from total DNA in both plants and fungal endophytes were studied. These sequences were analysed and compared, and they were also compared to the 5.8S rDNA/ITS sequence of fungal enduphyte Embellisia sp. L12 from the O.lambertii, O.sericea and A.mollisimus distributed in USA.

本研究采用高效液相色谱-质谱联用法测定了三种棘豆植物的苦马豆素含量；通过ISSR分子标记技术对三种棘豆种群遗传多样性及其苦马豆素相关标记进行了研究；将小花棘豆植物单株进行体外真菌培养，研究了菌落和分生孢子的微生物形态学特性，从植物总DNA和相同植株培养的真菌总DNA扩增真菌的5.8SrDNA/ITS区，进行了DNA序列分析与排序；联系单株小花棘豆的苦马豆素含量测定和内生真菌ITS序列分析结果，与从美国分布的二种棘豆(O.lambertii、O.sericea)和一种黄芪(A.mollisimus)中分离的内生真菌埃里砖格孢属Embellisia sp.L12株得到的结果进行了比较。

Lam. and its related species are called plants of Ipomoea section batatas, which are classified into two groups based on the cross-compatibility with sweetpotato: Group I cross-compatible with sweetpotato and Group II cross-incompatible with sweetpotato.

根据同甘薯的杂交亲和性，将甘薯组植物分为两个群：同甘薯杂交亲和的第Ⅰ群和同甘薯杂交不亲和的第Ⅱ群。

Megachile desertorum Morawitz is an important pollinator of many endangered species and constructive desert plants in West Erdos Region.

沙漠石蜂 Megachile desertorum Morawitz为多种植物的传粉昆虫，在西鄂尔多斯地区是多种濒危植物和荒漠建群植物的重要传粉者。

The research results showed that the effects of the Chenopodiaceae functional group on productivity were greater than other functional groups in shifting, semi-shifting and semi-fixed sandy grasslands.

结果表明：在流动、半流动和半固定沙地中，藜科植物的作用比较明显，而其他功能群植物的作用较弱；在固定沙地中，禾本科、豆科植物的作用明显增强。

The results show that, firstly, Stellera chamaejasme L, which rely on their developed axial root system in the 10～40cm soil layer to occupy the competitive priority of volume, length, surface area and so on, in the case of their adaptive faculty to poor surroundings resulting from fruit picking, trampling and overgrazing as well as with the phenomenon of restrained growth among various plants, gradually become the dominant plant in the herbaceous community; secondly, this kind of degraded grassland has not displayed any general characteristic of degradation such as surface exposure, accumulative quantity of vegetation reduced, water loss, soil erosion and so on, therefor, it should be dealt with distinguishingly; thirdly, if"Stellera chamaejasme L Killer"and"Oxytropis ochrocephala Killer"invented by CAS are taken advantage of respectively in the bloom period of Stellera chamaejasme L and at the beginning of florescence of Oxytropis ochrocephala bunge by ultra-low volume spray of 1. 05L/hm〓 and 1. 35～165L/hm〓 dosage separately, the death rates of poisonous herbs may achieve above 95% and 92% correspondently; fourthly, this technology with the characteristics of high work efficiency, exclusive selectivity and convenient operation, is safe to non-target plants and other animals, and has no toxic or side-effect to environment; furthermore, an execution of"Stellera chamaejasme L Killer"spray and a two-year grazing prohibition can be effectively applied on degraded grasslands of"Weed and Poisonous plants Type".

结果表明：狼毒凭借发达的轴根系在10～40cm土层中形成的体积、长度、表面积等竞争优势，以及对采食、践踏、过度放牧所形成的不良环境的适应能力和异株克生现象的存在，逐步成为草群中的优势植物；毒杂草型退化草地没有表现出地表裸露、植物蓄积量减少、水土流失等一般性退化特征，对该类草地的治理应区别对待；应用中科院研制的'灭狼毒'和'灭棘豆'分别在狼毒盛花期和黄花棘豆初花期，以1.05L/hm〓、1.35～165L/hm〓的施用量超低容量喷雾，毒草的死亡率可达到95％、92％以上；该技术具有工效高、选择性专一、灭效高、操作简便，对非靶标植物和其它动物安全，对环境无毒副作用的特点；采用喷施'灭狼毒'+短期禁牧措施，可以有效治理毒杂草型退化草地。

The cluster analysis showed that at level 0.73, 77 tested strains were clustered into 4 groups: A1: strains of Lactobacillus casei (35.06% of the strains), A2: strains of Lactobacillus fermentum (61.04% of the strains), A3: strains of Lactobacillus helveticus and A4: strains of Lactobacillus plantarum.

聚类分析表明，在0.73的水平上，77株乳杆菌共分为4大类群：干酪乳杆菌群A1、发酵乳杆菌群A2，瑞士乳杆菌群A3和植物乳杆菌群A4。

Furthermore, there is a great phenotypic diversity among the new strains isolated from the same host. Different groups consisted of the new strains from the same host, some were Rhizobium, some were Bradyrhizobium, such as the new strains isolated from leguminous plants of AMkora Prain, Trifolium repens Lam, Aeachynomene Mica L, Indigofera bungeana Steud.

同时，攀西地区豆科植物根瘤菌的多样性还表现在某些来自同一种寄主植物根瘤菌的多样性方面，如分离自山槐、白车轴草、合萌、铁扫帚上的同一种寄主植物内的根瘤菌分别聚在不同的表观群；且来自山槐、合萌、铁扫帚上的根瘤菌既有快生型，又有慢生型。

A number of microplants with spherical, triangular, polyangular and boat-like shapes have been found both from the early Palaeoproterozoic Dashiling and Qingshicun Formations (ca. 2500- 2400 Ma) of the Doucun Subgroup of the Hutuo Group and the late Palaeoproterozoic Changzhougou and Chuanlinggou Formations (ca. 1800 -1700 Ma) of the Changcheng Group in North China. According to the features of these fossils, such as size, external shape and internal structure, they may belong to unicellular eucaryotic planktons.

在华北地区古元古代滹沱群豆村亚群的大石岭组、青石村组(约2500～2400 Ma)和长城群的常州沟组、串岭沟组(1800～1700 Ma)中存在着大直径的球形和形态呈三角形、多角形及船形微古植物，根据它们的大小、外部形态和内部结构等综合判别，它们可能属于单细胞真核浮游生物。

Plant species were classified into six plant functional groups based on their life forms, that is, trees, shrubs, sub-shrubs, perennial grasses, perennial forbs and annuals.

2依照生活型将锡林河流域主要植物种划分成6个植物功能群：乔木、灌木、半灌木、多年生禾草、多年生杂类草和一年生植物。

The main researching contents included as following:relationships betweenspecies diversity,community richness,vegetation succession,soil volume weight,solu-ble Na+concentration and five soil chemical elements(N、P、K、Ca、Mg)concentrationwith grazing intensities in the grassland.Relationships between concentrations,re-serve pools of plant nutrient materials,including five macroelements(N、P、K、Ca、Mg),crude protein,crude fibre,crude fat and total nonstructural carbohydrate,and their allocations in defferent plant parts with grazing intensities in thegrassland.Effects of grazing on Leymus chinensis population were also examined andthat more attentions were paid on the responses of many biological characteristics ofabove-and below-ground plant modules to different grazing intensities.Furthermore,in the respects of plant production,survival rate,tillering ability,total nonstructuralcarbohydrates content and others,the effects of one years different defoliationpatterns on the vitality of Leymus chinensis population were detected.

主要研究内容有：放牧对羊草草地植被和土壤的影响，致力于物种多样性、群落丰富度、植被演替和植物生产量、以及土壤容重、土壤水溶性Na+含量和五种土壤大量营养元素(N、P、K、Ca、Mg)的含量等土壤理化性状与放牧强度关系的分析，分析了不同放牧强度与羊草草地草群和羊草种群地上和地下各植物部分中多种营养物质的浓度、贮量及其分配的关系；放牧对羊草种群的影响，注重了羊草种群的地上与地下各植物器官对不同放牧强度的反应和适应性变化，最后，从植物生产量、存活率、分蘖能力以及总非结构性碳水化合物含量等方面，探讨了不同人为去叶方式组合对羊草种群当年和次年生活力的效应。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。