The littoral wetland in Qinhuangdao area is a representative sandy coast wetland in China,and its main wetland types are sandy coast wetland,rocky coast wetland,estuarine wetland,lagoonal wetland,shallow sea wetland and artificial wetland.

秦皇島地區(qū)濱海濕地是我國(guó)最具代表性的沙質(zhì)海岸濕地分布區(qū)黄色激情视频一区，主要濕地類型為沙質(zhì)海岸濕地操美女视频在线网站、巖石性海岸濕地18岁以上才能看的视频网站、河口濕地最新看片地址、湖濕地、淺海水域和人工濕地欧美的性爱。

The result shows that well developed microbiotic crust results in less invalidation precipitation than sandy soil, but sandy soil conserves 18% precipitation in deeper layer when the soil covered with microbiotic crust had been dry completely.

結(jié)果表明欧美老妇人与小伙子性生交，結(jié)皮和流沙地表的蒸發(fā)速率隨時(shí)間的變化趨勢(shì)基本相同，但在不同的蒸發(fā)階段具有各自不同的特點(diǎn)欧美生生活视频AAA，總的說(shuō)來(lái)国产美女精品一区在线观看，發(fā)育良好的苔蘚結(jié)皮導(dǎo)致相對(duì)較少的無(wú)效降水，但在更長(zhǎng)的時(shí)間維持較高的蒸發(fā)速率；流沙和初步發(fā)育的降塵結(jié)皮導(dǎo)致了較多的無(wú)效降水日韩图片高清中文字幕，但由于降水的入滲深度相對(duì)較深性XXXXX大片免费视频，需要更長(zhǎng)的時(shí)間完成蒸發(fā)過(guò)程。

Member it wash＇ t the Low Veldt, or the Bush Veldt, or the Sour Veldt, but the ＇ sclusively bare, hot, shiny High Veldt, where there was sand and sandy- coloured rock and ＇ sclusively tufts of sandy-yellowish grass.

請(qǐng)記住欧美丰满熟妇大aqq，那不是&低低草原&人人干人人看人人插人人操，不是&灌木草原&，也不是&濕冷草原&国产精品午夜国产小视频，而是光禿禿欧美性爱xxxx在线视频、熱烘烘、亮閃閃的高高草原成年网站在线观看播放器视频。

Artemisia intramongolica is a kind of dominant shrub on sandy land in the typical grassland area o our country. It has been suitable to the hot and xeric habitat on sandy land for a long time and has formed series of characteristics that are adaptive to its habitat.

褐沙蒿是分布于我國(guó)典型草原帶沙地中的優(yōu)勢(shì)灌木伊人久久大香焦，由于長(zhǎng)期生長(zhǎng)在草原區(qū)沙地高溫、干旱的環(huán)境中网色网站大全cao，形成了一系列與環(huán)境相適應(yīng)的生物學(xué)特性久久99国产高清丝袜免费费。

By measuring the longitudinal dispersivity α〓 of several sandy media with different grain size distribution in different transform distance L through sandy column; the formula of α〓=α〓 is obtained, this provides a method of solving scale-effect in the numerical model and in the practical application.

3通過(guò)砂柱試驗(yàn)測(cè)定了幾種粒徑分布不同的砂性介質(zhì)在不同運(yùn)移距離處的縱向彌散率，并得到計(jì)算不同粒徑砂性介質(zhì)隨運(yùn)移距離變化的縱向彌散率公式亚洲视频色网站，在實(shí)際應(yīng)用和數(shù)學(xué)模型中可作為解決尺度效應(yīng)問(wèn)題的一種方法

The result showed that the spatial variability of the soil bulkinthis area was complicated and there was not a certain variation.The soil bulk density of loamy soil was(1.55±0.09)g/cm3,the soil bulk density of sandy soil was(1.43±0.16)g/cm3 and the soil bulk density of clayey soil was(1.54±0.07)g/cm3.The soil bulk density of the cross-bedding soil composed by sandy soil and clayey soil was(1.47±0.12)g/cm3.The soil showed a tendencyto be compacted.

結(jié)果顯示家庭乱伦小说亚洲色图，研究區(qū)域土壤容重的空間變異情況復(fù)雜，無(wú)確定的變化規(guī)律国产小视频激情；壤質(zhì)類土壤的容重值為(1.55±0.09)g/cm3，砂質(zhì)類土壤的容重值為(1.43±0.16)g/cm3我要看国产免弗一级黄色作爱色性作爱旡遮挡，粘質(zhì)類土壤的容重值為(1.54±0.07)g/cm3在线你懂的亚洲国产，粘砂交錯(cuò)層的土壤容重值為(1.47±0.12)g/cm3，土壤呈緊實(shí)趨勢(shì)色呦呦二区亚洲。

The purple heather still extends for miles, with its barrows and aerial spectacles, intersected with sandy uneven roads, just as it did then; towards the west, where broad streams run into the bays, are marshes and meadows encircled by lofty, sandy hills, which, like a chain of Alps, raise their pointed summits near the sea; they are only broken by high ridges of clay, from which the sea, year by year, bites out great mouthfuls, so that the overhanging banks fall down as if by the shock of an earthquake.

現(xiàn)在的尤蘭仍然和那時(shí)一樣99爱久久爱国产视频在线，它深黃色的荒地，它的古冢黄片在线看啊啊啊啊啊啊，它的海市蜃樓和它的一些交叉的acc片毛片免费视频、多沙的、高低不平的道路日本免费观看黄站，向天際展開(kāi)去黄色成年人网站天堂版免费看。朝西走，許多河流向海灣流去91免费高清国产自产拍，擴(kuò)展成為沼澤地和草原国产综合色视频。環(huán)繞著它們的一起沙丘，像峰巒起伏的阿爾卑斯山脈一樣妓女网妓女网站，聳立在海的周圍啪啪啪免费视频网站，只有那些粘土形成的高高的海岸線才把它們切斷。浪濤每年在這兒咬去幾口，使得那些懸崖絕壁下塌在线观看色污网站，好像被地震搖撼過(guò)一次似的欧美视屏在线视频。

Throug the study on irrigation quota and irrigation times for licorice root planted in arid sandy land of middle Ningxia, the result shows: by increasing irrigation frequency and irrigation fixed quantity properly, it can play a positive role in the conserving and increasing water-holding capacity in arid-belt sandy area.

摘要通過(guò)對(duì)寧夏中部干旱帶沙地種植甘草的不同灌水定額及次數(shù)的研究，結(jié)果表明亚洲无码高清播放黄色，適當(dāng)?shù)脑黾庸嗨螖?shù)和灌水定額對(duì)于保持和增加干旱帶沙壤土持水率具有積極的作用国产欧美日韩区一区二，有利于植物的生長(zhǎng)發(fā)育。

In order to get sandy alumina ,the new technics of producing sandy alumina with two-stage precipitation of high concentration sodium aluminate solution.

采用高濃度鋁酸鈉溶液研究了添加劑存在的條件下兩段法生產(chǎn)砂狀氧化鋁的新工藝亚洲最新h在线。

The Rhizosphere effect of soil bacteria of Artemisia halodendron was the most obvious on shifting sandy land, that of semi- withered Artemisia halodendron was the least on fixed sandy land because it had lost basically physiological active, and the roots had mostly withered.

隨著土壤質(zhì)地的變化流動(dòng)沙地上差巴嘎蒿根際微生物的根際效應(yīng)最為明顯欧美五区，而固定沙地瀕臨死亡的差巴嘎蒿已基本喪失生理活性，根系大部分枯死超碰人人白浆国产五十，根際效應(yīng)最小97超人碰人人艹人人摸人人干。