Among the species we measured, the maximum water holding specie is Abelia chinensis, and the minimum is Cudrania tricuspidata, and the water holding capacity of Abelia chinensis is three times as Cudrania tricuspidata. The shrub and herbage amount of six forest types is Shrubbery and grass land, Pinus massoniana forest, Mixed conifer forest, Conifer and broadleaf forest, Broadleaf forest and Cupressus funebris forest in order. And the water holding amount of shrub and herbage have positive relative with their amounts.

6種森林類型林下凋落物存儲量從大到小依次是柏木林一个人免费色哟哟在线视频观看、針闊混交林玖玖视频免费网址、闊葉林92婬黄看大片、針葉混交林欧美性爱一级片A片、灌草地和馬尾松林欧美人人艹；各種森林類型的凋落物都以半分解層為主啊啊啊插下面，凋落物的組成以葉子為主枝條為輔，并雜有一些果實(shí)ww黄片、樹皮及芽鱗等精品人妖一区二区三区四区；凋落物持水量從大到小依次是闊葉林、柏木林影音先锋99日韩在线观看、針闊混交林观看在线精品在线、針葉混交林、灌木林和馬尾松林国产XXXX在线观看免费视频，主要原因是除了受凋落物數(shù)量的影響外欧美xxxxA片，還受凋落物成分的影響。

Results showed that the best antibacterial growth on Huaihai West Road was a tree layer of Zelkova schneideriana and Cedrus deodara, a shrub layer of Cercis chinensis and Buxus sinica, and a ground cover of Zephyranthes candida with an antibacterial effect of 51.9%. On Beijing North Road a tree layer of Magnolia grandiflora and a shrub layer of Photinia serrulata revealed an antibacterial effect of 47.1%. Thus, depending on the arrangement, antibacterial effect can improve the urban street-side environment in autumn and winter.

結(jié)果表明H纯肉无遮挡3d动漫在线，秋季10月上旬不同植物群落均具有一定的抑菌作用激情视频永久在线；淮海西路處理2-5（喬木層為大葉櫸樹Zelkova schneideriana和雪松Cedrus deodara，灌木層為紫荊Cercis chinensis和黃楊Buxus sinica一级一片免费观看视频完整版，地被為蔥蘭Zenhyranthes candida）和北京北路處理1-4（喬木層為廣玉蘭Magnolia grandiflora手机看黄av免费网址，灌木層為石楠Photinia serrulata）復(fù)層配置植物群落的抑菌效果最佳，抑菌率分別達(dá)51.93%和47.10%合理的植物群落配置的抑菌效果在秋冬季節(jié)對改善街道空氣質(zhì)量具有積極意義色系视频网站大全免费。

The process of natural succession of restoring vegetation in central Guizhou after rocky desertification in Karst area was divided into the herbosa stage, the stage of herbosa-shrub, the stage of vine-shrub, the stage of subaltern tree forest and the climax stage.

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The maximum of seeds come forth with the shrub of three coppice shoots remained, but the natural coppiced shrub have the biggest weight of single seed.

程度最輕的調(diào)控3克隆株/叢在增加果實(shí)數(shù)量方面最有效果黄色网站免费打开，果實(shí)的單粒重卻以自然狀態(tài)萌生叢為最大人人拍人人操。

Different shrub tree were differente in proper soil nutrients of plant ecesis and improvement of soil nutrients. Shrub community was better than herb community in soil nutrient. The process of vegetation secondary succession has an improved trend of soil nutrient.

不同灌木種群所需的適宜土壤養(yǎng)分條件和對土壤養(yǎng)分的改善效應(yīng)存在較大差異；植被次生演替灌叢階段的土壤養(yǎng)分明顯優(yōu)于草本階段，植被次生演替過程土壤養(yǎng)分呈逐步改善的趨勢亚洲字幕中文丝袜在线。

Habitat selection of goral was mainly influenced by distance to human disturbance, altitude, distance to forest edge, distance to water source, slope position, shrub canopy cover, shrub height, level of concealment, slope aspect and wind direction.

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In this paper, as a case of Karamay, we have studied on space-time changement of soil quality in oasis of arid area. We measured quality for different land use types and years in same type by combinativing field sampling for Karamay in Xinjiang and analysis in laboratory, which is directed by former theory of soil quality. Then we did integrated evaluation of soil quality for different land use types, and had drew some conclusions as followed: In four land use types, the soil bulk density of layers(0～15cm) for farmland and tree land is bigger than the other land use types.The organic matter of every layer in manpower Tamarix Bulrush land is bigger; organic matter of Tamarix Bulrush land release efficiency nitrogen which result ration of C/N is higher; total nitrogen of all layers in farmland variety great as being effected by mass use of nitrogen in agriculture; deadwood and defoliation of tree日本超碰在线免费观看一级、shrub and bulrush pooled in 5cm layer to result that quick nitrogen is the biggest among all layers. The total salt of nature shrub tree land for every layer being bigger than farmland explain that nature shrub thee land strongly stand salt and farmland for basification in this area; that the nutrient of face layer is bigger than the ground layer may be explained by that vegetation gather nutrient to be stored in deadwood and defoliation.

本文對以克拉瑪依為例女人16一毛片，對干旱區(qū)綠洲土壤質(zhì)量的時間空間變化進(jìn)行研究，在有關(guān)土壤質(zhì)量的研究理論指導(dǎo)下日本性爱三级片免费在线播放，通過田間調(diào)查取樣和室內(nèi)分析相結(jié)合的方法国产平胸美女在线观看，對新疆克拉瑪依市農(nóng)業(yè)開發(fā)區(qū)的不同土地利用方式及同一土地利用方式下不同利用年限土樣土壤理化性質(zhì)進(jìn)行測定，從而對新墾綠洲不同土地利用類型土壤質(zhì)量進(jìn)行綜合評價五月社社社色区，結(jié)果如下：四種土地利用方式中40分钟视频在线观看免费黄，農(nóng)地、喬木林地表層(0-15cm)土壤容重較大欧美日本大片在线观看黄；各土層人工檉柳蘆葦?shù)氐耐寥烙袡C(jī)質(zhì)含量均較大久久A毛片超清无码一区二区三区；檉柳蘆葦?shù)氐挠袡C(jī)質(zhì)在礦化過程中所釋放出有效氮，導(dǎo)致檉柳蘆葦?shù)氐腃/N比例較高A级黄丝袜网站；受到農(nóng)業(yè)耕作使用大量氮肥的影響国产精品湿润，農(nóng)地各土層全氮含量變異較明顯；喬木欧美另类偷自拍清纯唯美、灌木及蘆葦?shù)目葜β淙~主要集中在5cm范圍之內(nèi)日韩新毛片无码免费看，導(dǎo)致幾種土地利用方式類型下該層土壤速效氮最大；天然灌木林地的土壤總鹽在各層均較大人人操人人干综合网，其次是農(nóng)地yilef.com，說明天然灌木林地的高耐鹽能力，以及該區(qū)農(nóng)業(yè)生產(chǎn)用地的土壤鹽堿化程度較重国产精品视频你懂的97。

Seven different representative vegetation types of alpine grassland in Eastern Qilian Mountains, which were Rhododendron fruticosa shrub land, Salix cupularis fruticosa shrub land, Dasiphoru fruticosa shrub land, Polygonum grassland, Grass steppe, Swamp grassland and Kobresia grassland were selected to be experimental samples.

本文選取東祁連山七種具有代表性的高寒草地植被類型作為試驗樣地国产v欧美v日韩v亚洲老妇，即杜鵑灌叢(Rhododendron fruticosa shrub land)，高山柳灌叢(Salix cupularis fruticosa shrub land)鲁鲁鲁免费视频，金露梅灌叢99久久久国产，珠芽蓼草地，禾草草地国产精品视频区一区二，沼澤草地a片免费资源，嵩草草地。

The effect of wind protection of shrub and half-shrub is the best, and the effect of bush is better than individual shrub's, the that of the trees is the worst.

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P in Shule River Alluvial Fan Oasis in Gansu subsidized by CNSF. Through field geological and environmental observations and sampling, quartz OSL dating, organic carbon ~(14)C dating, as well as analysis of TOC,grain size and Pollen assemblage of the samples from ten sediment profiles in front fine grain sediment zone of the Shule River Fan, the results obtained as follows:(1)The vegetation evolution history on Shule River Alluvial Fan and circumjacent since about 13 ka B.P. could be divided into 6 phases: about 12.1-13.1ka, a sparse coniferous and broadleaf trees - shrub grassland, cold and wet climate; 9.2-12.1ka, shrub grassland, temperature rising but precipitation and humidity getting down; 5.8-9.2ka, sparse forest with the most flourish shrub grassland under the optimal climate; 4.3-5.8ka, coniferous and broadleaf mixed forests -shrub grassland, temperature rising slightly and getting dry; 4.3-2.8ka, grass vegetation and climate became more dry; 2.8-2.3ka, coniferous forests -shrub grassland, precipitation and temperature getting down, but a higher relative humidity.

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