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譜-質(zhì)譜聯(lián)用法測定了三種棘豆植物的苦馬豆素含量免费网禁拗女网站；通過ISSR分子標記技術(shù)對三種棘豆種群遺傳多樣性及其苦馬豆素相關(guān)標記進行了研究特黄特硬特黄的黄片；將小花棘豆植物單株進行體外真菌培養(yǎng)十大黄色免费网站，研究了菌落和分生孢子的微生物形態(tài)學特性欧美一级在线看片，從植物總DNA和相同植株培養(yǎng)的真菌總DNA擴增真菌的5.8SrDNA/ITS區(qū)免费欧美在线，進行了DNA序列分析與排序99精品r视频在线观看；聯(lián)系單株小花棘豆的苦馬豆素含量測定和內(nèi)生真菌ITS序列分析結(jié)果，與從美國分布的二種棘豆(O.lambertii黄页网站视频在线看、O.sericea)和一種黃芪(A.mollisimus)中分離的內(nèi)生真菌埃里磚格孢屬Embellisia sp.L12株得到的結(jié)果進行了比較jizz视频。

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.

根據(jù)同甘薯的雜交親和性，將甘薯組植物分為兩個群：同甘薯雜交親和的第Ⅰ群和同甘薯雜交不親和的第Ⅱ群aa精品视频在线观看。

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為多種植物的傳粉昆蟲1024欧美性爱，在西鄂爾多斯地區(qū)是多種瀕危植物和荒漠建群植物的重要傳粉者。

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.

結(jié)果表明：在流動欧美A片久久、半流動和半固定沙地中精品天堂很干视频，藜科植物的作用比較明顯，而其他功能群植物的作用較弱最近免费中文,最近免费中文字幕大全；在固定沙地中人人操两性视，禾本科欧美精品欧美极品欧美视频、豆科植物的作用明顯增強。

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".

結(jié)果表明：狼毒憑借發(fā)達的軸根系在10～40cm土層中形成的體積国产最新黄色网站免费观看、長度熟妇激情内激情内射图片、表面積等競爭優(yōu)勢，以及對采食国产黄色视频高清在线观看、踐踏欧美巨大XXXX做受高清、過度放牧所形成的不良環(huán)境的適應(yīng)能力和異株克生現(xiàn)象的存在，逐步成為草群中的優(yōu)勢植物日韩aⅴ先锋影音资源网；毒雜草型退化草地沒有表現(xiàn)出地表裸露麻豆av免费在线、植物蓄積量減少、水土流失等一般性退化特征亚洲欧美日韩另类，對該類草地的治理應(yīng)區(qū)別對待又黄又粗又长一区二区视频；應(yīng)用中科院研制的'滅狼毒'和'滅棘豆'分別在狼毒盛花期和黃花棘豆初花期，以1.05L/hm〓久99久视频精选、1.35～165L/hm〓的施用量超低容量噴霧久久久这里精品国产，毒草的死亡率可達到95％、92％以上色妓女网站；該技術(shù)具有工效高美女爽到高潮朝喷的视频4399、選擇性專一、滅效高欧美日韩国产黄色、操作簡便黄色网站在线免费。观看，對非靶標植物和其它動物安全，對環(huán)境無毒副作用的特點涩涩网站视频；采用噴施'滅狼毒'+短期禁牧措施五月天丁香婷婷在线综合天堂，可以有效治理毒雜草型退化草地。

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.

聚類分析表明操逼视频网站网站视频网站，在0.73的水平上国产一级婬片A片AAA久久中文，77株乳桿菌共分為4大類群：干酪乳桿菌群A1、發(fā)酵乳桿菌群A2人人人人人人人人人人艹，瑞士乳桿菌群A3和植物乳桿菌群A4天堂www天堂在线资源网爱搞。

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.

同時，攀西地區(qū)豆科植物根瘤菌的多樣性還表現(xiàn)在某些來自同一種寄主植物根瘤菌的多樣性方面国产大全色婷婷五月月天，如分離自山槐A片特黄毛片视频大全、白車軸草、合萌女人腿张开让男人桶爽动态图片、鐵掃帚上的同一種寄主植物內(nèi)的根瘤菌分別聚在不同的表觀群求手机在线看黄色视频的网站；且來自山槐、合萌特级a爱片免费观看、鐵掃帚上的根瘤菌既有快生型wwwzaixianavcom，又有慢生型激情的小说视频。

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.

在華北地區(qū)古元古代滹沱群豆村亞群的大石嶺組、青石村組(約2500～2400 Ma)和長城群的常州溝組亚洲免费视频日韩在线观看、串嶺溝組(1800～1700 Ma)中存在著大直徑的球形和形態(tài)呈三角形亚洲网站A、多角形及船形微古植物，根據(jù)它們的大小亚洲性爱一级视频在线观看、外部形態(tài)和內(nèi)部結(jié)構(gòu)等綜合判別国产小视频一区二区在线播放，它們可能屬于單細胞真核浮游生物。

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依照生活型將錫林河流域主要植物種劃分成6個植物功能群：喬木99/久久精品视频、灌木在线视频区、半灌木、多年生禾草三级片第一页、多年生雜類草和一年生植物1688在线啪国自产视频。

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欧美色屌、K一级黄色电影视频影院、Ca、Mg)concentrationwith grazing intensities in the grassland.Relationships between concentrations,re-serve pools of plant nutrient materials,including five macroelements(N亚洲zaixianguankan、P可以直接免费观看的av毛片、K、Ca一区二区欧美房事、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.

主要研究內(nèi)容有：放牧對羊草草地植被和土壤的影響GOGO全球高清私拍摄影，致力于物種多樣性、群落豐富度日韩精品免费观看大全视频、植被演替和植物生產(chǎn)量又粗又爽又黄操女人视频、以及土壤容重、土壤水溶性Na+含量和五種土壤大量營養(yǎng)元素(N美屄网站、P、K黄色网站久久久、Ca国产原创麻豆高清有码在线、Mg)的含量等土壤理化性狀與放牧強度關(guān)系的分析，分析了不同放牧強度與羊草草地草群和羊草種群地上和地下各植物部分中多種營養(yǎng)物質(zhì)的濃度最近更新中文字幕大全、貯量及其分配的關(guān)系www.黄片动力大一免费看；放牧對羊草種群的影響，注重了羊草種群的地上與地下各植物器官對不同放牧強度的反應(yīng)和適應(yīng)性變化欧美性爱在线免费播放，最后免费看国产老师开裆丝袜喷水，從植物生產(chǎn)量、存活率800在线视频免费观看、分蘗能力以及總非結(jié)構(gòu)性碳水化合物含量等方面一级黄色XXXX，探討了不同人為去葉方式組合對羊草種群當年和次年生活力的效應(yīng)人人上人人插人人操。