沙地的

Otindag Sandland is one of the main sandlands and among the most seriously desertificated region in semiarid area of China.

浑善达克沙地是我国北方干旱半干旱区的主要沙地和严重荒漠化地区之一。

In order to explore the grain-size distribution characteristics and geo-genetic types of land desertification in Mo Us desert, the research on the grain-size characteristics of sediments since late Pleistocene has been carried out in the desert area and neighboring area such as inside desert, sand covered loess plateau, loess plateau and river valley. The research result shows that sediments of different geologic genetic types are the fundamental material source of sandy desertification in these areas and the distinguishing of different types of the sediments is the theoretical basis of classification of different geogenetic type of sandy desertification. The contribution of different geological roles on the land desertification and its significance to prevent and deal with the land desertification have also discussed.

为了研究毛乌素沙地沉积物的粒度特征与土地沙漠化的地质成因类型，通过系统研究沙地及相邻地区晚更新世以来在沙地内部、覆沙黄土区、黄土高原和河流谷地与湖泊等不同地质构造地貌条件下所形成的沉积物粒度特征，指出不同地质成因类型的沉积物是这些地区土地沙漠化的物质基础，区分不同类型的沉积物也是构成不同地质成因类型土地沙漠化分类的理论基础，探讨了不同地质作用对土地沙漠化的贡献及其对土地沙漠化防治方面的意义。

It can provide some theoretic gist for resource value of water and soil in sandy land to indicate the change and law of soil moisture character, as well as the water circulation and balance mechanism in sandy land, at the same time, it have important practical significance to protect limited water resource, improve using efficiency of water resource,control desertification, choose and educate sand binding plant, renew and restore degraded ecosystem, as well as the economy benefit of irrigative agriculture and intending trend of development.

揭示沙地土壤水分特征的变化规律以及沙地水循环和平衡机理，可以为沙地水土资源评价提供一定的理论依据，同时对于保护当地有限的水资源和提高水资源的利用效率，以及沙漠化防治，固沙植物的选育，退化生态系统的恢复与重建，灌溉农业的经济效益和未来的发展趋势都具有重要的实践意义。

Picea mongolica is a rare and endangered species in the world, which is conferred to the tide of "biology gene bank" and "living fossil", and mainly distributes in Baiyinaobao sandy land of Chifeng.

沙地云杉是世界上罕见的树种，也是世界珍稀濒危树种之一，有&生物基因库&和&活化石&之称，集中分布在赤峰市白音敖包沙地。

The aim of this research is to understand the ecological relationship between sand vegetation and environment, adaption charactristics of psammophilous plants to sandy environment and feature of plant resources in Otindag Sand Land, and further to provide theory evidence for selection optimal sand-fixation species and planning feasible process of vegetation restoration in desertification control.

本论文的目的是了解沙地植被与环境的生态关系、沙生植物适应沙地环境的特点以及沙地植物资源特征，为在沙漠化防治中选择合适的治沙物种、制定合理的植被恢复方案提供理论依据。

Caragana intermedia is a psammophilous shrub and one of the commonly occurred species in fixed and semi-fixed sand dunes in Otindag Sand Land and MU US Sand Land.

中间锦鸡儿是浑善达克沙地和毛乌素沙地固定和半固定沙丘上常见的一种沙生灌木。

In this thesis, the adaptive strategies of the psammophyte plants in Otindag Sandland to the sand moisture, sand burial and environmental heterogeneity are investigated using both field and greenhouse experiments.

本文应用实验生态学方法研究了沙地植物对水分、沙埋和养分异质性环境的生态适应对策。浑善达克沙地属于半干旱区域。

I ran up and down the beach in both dry, soft sand, and the firmer sand. Kicked the soft sand around as well, making sure the the gaiters were had sand on them.

我在海滩的干燥软沙地和硬沙地上来回地跑，并且四处踢软沙子，确保鞋罩沾上沙子。

As a result, getting the following results:1Soil of Horqin sandy land mostly belongs to the eclipsed soil,there are the remarkable difference and regulational change about its machine constitutions, the physics and chemistry characteristics in different geography types.2A different geography of plant evolution is divided into follows:①livings of the sand②the wet living③the wasteland④livings of the salt⑤pasturing⑥natural wood.

据此，分析出以下结果：1）科尔沁沙地土壤大多属于高危风蚀土壤，其机械组成、物理化学性质在不同地貌类型中存在着显著差异并具有规律性的变化特征。2）沙地不同地貌类型区植被演替系列共分为：①沙生、②湿生、③撂荒地、④盐生、⑤放牧、⑥天然林这6个演替系列。

Picea mongolica is an endemic and endangered tree species in sandy forest steppe ecotone in eastern Inner Mongolia Autonomous Region of China, and P.

沙地云杉是我国内蒙东部沙地森林草原过渡带的特有濒危树种。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。