Since 1987, active in building a financial anti-desertification projects, seed bases, animal breeding, one equivalent to the desert eco-tourism eco-engineering model of the desert zone, present in this model around the region to carry out wildlife conservation work and the edge of the desert governance "China desert safari park" has begun to take shape.

自1987年以來亚洲一级二级三级在线观看，積極建設(shè)一個(gè)融防沙治沙工程、種苗基地建設(shè)激情小说激情图片乱伦电影、動(dòng)物繁育在线看性爱视频网站、沙漠生態(tài)旅游等于一體的沙漠生態(tài)工程示范區(qū)，目前在這個(gè)示范區(qū)內(nèi)圍繞開展野生動(dòng)物保護(hù)工作和沙漠邊緣治理的"神州荒漠野生動(dòng)物園"已初具規(guī)模亚洲,欧洲,乱伦。

Centralized states thus surrounded the desert on the north and east, it remained outside of the control of these states. Raids from the nomadic Berber people of the desert were a constant concern of those living on the edge of the desert.

中央集權(quán)的國(guó)家只分布在沙漠的北部和東部邊緣思思热99视频，他們的權(quán)力達(dá)不到沙漠腹地，所以這些生活在沙漠邊緣的人經(jīng)常受到在沙漠中游牧的柏柏爾人的襲擊人人操AⅤ。

Researches on the strata and their sedimentary facies in the Sandy Desert Area of China since 150000aBP., fossil verteberates, mollusks and sporo-pollen, and the remains of fossil man activities and the analysis resultes of grain-sizes, detrital heavy minerals, clay minerals, chemical elements and CaCO〓as well as the susceptibility values of the strata comprehensively show that the afore-named four sandy desert areas since that time, all had ever undergone intensely developing sandy desert processes but they did not all evolve towards uniform this environment, and the content and form between them were different.

通過對(duì)中國(guó)沙區(qū)15萬年來的地層及其沉積相人人在线人人操九、古脊椎動(dòng)物、軟體動(dòng)物化石人妻一区二区三区,亚洲一级性生活视频、孢粉亚洲欧美日韩欧美、古人類活動(dòng)遺存與顆粒、碎屑重礦物91精品国产自产在线观看直、粘土礦物曰韩美女一级视频、化學(xué)元素、CaCO〓分析結(jié)果和地層磁化率值等的研究老熟妇操B视频，表明從那時(shí)以來上述四大沙區(qū)都曾經(jīng)有過強(qiáng)烈的沙漠發(fā)展過程人人操人人模人人操，但這幾個(gè)沙區(qū)沙漠環(huán)境的發(fā)展并不都是朝著一個(gè)方向，且?guī)渍唛g地質(zhì)過程的內(nèi)容與形式是不同的免费精品国产自产拍在线观看。

The water resources change is a leading factor in the vegetation degeneration there; The swamp vegetation was based on the background of large-scale lakes and rivers; the halophyte meadow was based on the background of dry lakes and riverside, and desert vegetation was based on the background of desert; desert vegetation was based on the background of desert at present.

水資源的變化是決定當(dāng)?shù)刂脖煌嘶闹鲗?dǎo)因子国产人人艹人人干，在大面積湖泊、河流背景上是沼澤植被免费看无码视频进入口，在干涸湖泊欧美性爱一,二,三区、河床背景上的是鹽生草甸植被，在沙質(zhì)荒漠背景上的是荒漠植被午夜性色一区二区免费视频。

In this paper the key points discussed were that, under the condition of a sharp hypsography of desert areas of Ordos basin, we used some new geophysical methods in the investigation of surface structure to obtain high accurate surface structure data and provide reliable scientific foundation for data acquisition and process; we dealt with the optimum coupling of surface geophones and the digital realization technique in desert areas, dug into a method of high frequency compensation according to attenuations by absorption near surface, adopted data processing and correction technique, solved high frequency attenuation and geophone coupling, eliminated the influences of sharply transverse fluctuation of hypsography in desert area on the seismic data, enhanced the fidelity and SNR of seismic section, and finally picked up more geologic information on the seismic profile and improved the precision of the lateral prediction for the reservoir beds.

本文旨在研究鄂爾多斯盆地沙漠區(qū)地表變化比較大的情況下国产一级毛片无码一区二区，在表層結(jié)構(gòu)調(diào)查中通過應(yīng)用一些地球物理新方法，以獲取高精度的表層結(jié)構(gòu)數(shù)據(jù)性爱视频人妻，為資料采集和數(shù)據(jù)處理提供更科學(xué)的依據(jù)老妇女棚户区卖淫对白视频；研究在沙漠區(qū)地表檢波器最佳耦合的方式與數(shù)字實(shí)現(xiàn)技術(shù)，研究通過近地表的吸收衰減規(guī)律進(jìn)行高頻補(bǔ)償?shù)姆椒ㄐ愿忻琅悠担捎脭?shù)據(jù)處理校正技術(shù)无码永久免费网站三级片，解決高頻吸收及檢波器耦合，消除沙漠區(qū)表層橫向劇烈變化對(duì)地震資料的影響日日摸夜夜摸人人看亚洲综合，提高地震剖面的保真度和信噪比大片A，從而使更多的地質(zhì)信息能夠從地震剖面中反映出來，提高儲(chǔ)層橫向預(yù)測(cè)的精度大线香蕉在线视频网站观看。

We will investigate the actuality of stony deserts in Guizhou, and divide their types on the basis of their intensity, covering rate of soil and vegetation and amount of species, and stduy the influence factors of forming different stony desert types in more coercing, and explore the ratio of influence factors in the different stony desert areas and the evolutionary mechanism of different stony desert types. Finally,we will stduy the growing conditions and species of arboreous in different geology, land form,hydrology region for natural lithogenic forest and artificial forest, and the natural conditions for failing in many artificial forest,and the reconstruction mechanism in different stony desert type regions.

對(duì)貴州石漠現(xiàn)狀調(diào)查操操操操操操人人人人人操，并根據(jù)石漠發(fā)育強(qiáng)度、土被日韩综合无码视频一区二区三区、植被覆蓋率和物種多少等進(jìn)行石漠類型分類轻点肏我在线观看91；對(duì)多重脅迫下不同石漠類型形成因子研究婷婷在线综合，探討各影響因子在不同類型石漠區(qū)的權(quán)值；探討各類型石漠演化機(jī)理三级片AAA；選取不同地質(zhì)亚洲欧美性爱片、地貌、水文背景區(qū)的原生巖生森林及人工造林區(qū)對(duì)其喬木的立土條件及物種研究精品在线视频99；選取貴州經(jīng)多次造林失敗的石山的自然條件研究并探索不同類型石漠區(qū)生態(tài)重建機(jī)理中文字幕第几页。

The fossil pollen date showed that vetetation changed from desert steppe dominated by Artemisia in early Holocene, though desert dominated by Chenopodiaceae at 9.0-6.3 ka, desert steppe dominated by Artemisia at 6.3-2.5 ka, to desert dominated by Compositae at 2.5-1.0 ka and Chenopodiaceae after 1.0 ka.

青土湖剖面孢粉分析結(jié)果顯示，該區(qū)9.0ka之前為蒿屬為主的荒漠草原av中文在线一级片，9.0～6.3ka藜科為主的荒漠精品一级黄色视频国产片一区，6.3～2.5ka蒿屬為主的荒漠草原，2.5～1.0ka菊科為主的荒漠国产精品一级黄色毛片，1.0ka之后為以藜科為主的荒漠一区二区视频在线导航。

Aims Spring ephemerals characterized by very short-term growth rhythm and specific biological traits in the Junggar Desert of China play an important role in succession of the desert plant community, maintenance of the desert biological diversity and conservation of water and soil in desert.

準(zhǔn)噶爾荒漠分布的早春短命植物不僅具有十分獨(dú)特的生物學(xué)特點(diǎn)，而且在荒漠植物群落演替淫荡少妇一级性爱视频、物種多樣性維持及土壤改良與防治水上流失等方面具有重要的生態(tài)學(xué)價(jià)值一级特黄aa毛片大片在线。

As pioneer plants, desert spring ephemerals play an important role in community succession, biodiversity maintenance and dune stabilization in desert ecosystems. We studied the diurnal changes in gas exchange of three desert spring ephemerals (Eremopyrum orientale, Malcolmia scorpioides, and Tetracme quadricormis, hereafter the genus names only) under natural conditions in the desert area of the Dzungaria Basin.

采用LI-6400便攜式光合測(cè)定儀亚洲黄色12级视频，在晴天條件下對(duì)準(zhǔn)噶爾荒漠3種典型短命植物東方旱麥草伊甸园永久地址在线2022、卷果澀芥和四齒芥的氣體交換特征的日變化規(guī)律進(jìn)行了研究。

After breakfast, travel to the world, one of the three-Ming Sand Mountain, located in Kubuqi Desert edge of the Xiang Shawan (60) sightseeing, while the surging of the Yellow River, Yellow River Bridge and the spectacular scenes, by cable car across the double Desert, into the desert hinterland to listen to the magic ring for sand, camels, Huasha, skateboards, wandering sand, Shahai walk through the desert learning knowledge.

早餐后国内黄片免费看，乘車赴世界上三大嗚沙山之一亚洲欧美性爱一区，位于庫布齊沙漠邊緣的響沙灣（60）觀光游覽，途中觀洶涌澎湃的黃河及黃河大橋壯觀場(chǎng)面欧美性爱肛交在线观看，乘坐雙人纜車越過沙漠可以直接免费看黄色视频的网址，進(jìn)入沙漠腹地去聆聽神奇響沙、騎駱駝强奸人人操、滑沙免费欧洲毛片在线视频、滑板、溜沙国内精品久久久麻豆精品、沙海漫步日韩色情国内自拍网页，學(xué)習(xí)沙漠知識(shí)。