查询词典 sand dune

The Changyeh forest park is situated at middle the Gansu Corridor oasis plain, is in the unique environment, northern side has prospect Long Shoushan to work as the household, encircles in the northern countryside rural cottage link, south side prospect Qilian is boundless, the scenery sand dune is continuous, but south side the Jiulong Jiang narrow-leaved oleaster forest is green and luxuriant, in the garden the sand beach, the sunlight, the forest, the lake water and so on abut the urban district, from, the environment is graceful all day long, the ideal condition profound, is the ideal botanical garden good.

张掖森林公园地处河西走廊绿洲平原中部，处于独特的自然地理环境，北面有远景龙首山当户，在北部田园村舍环围，南面远景祁连茫茫，中景沙丘连绵，而南面九龙江沙枣林郁郁葱葱，园内沙滩、阳光、森林、湖水等紧靠市区，自成天地、环境优雅、意境深邃、是理想的园林佳地。

The purpose of this study is to reveal the change characteristics of biological properties of sandy soil and its development trend under the establishment of C. microphylla plantations in flowing sand dune. With semi-moving sand dune and natural community as controls, the activities of phosphomonoesterase, saccharase, protease, urease, dehydrogenase and the Contents of microbial biomass C, N, P of the soil in an age sequence (5-, 10-, 22-year) of C.

为探讨采用小叶锦鸡儿固定流沙后，土壤生物活性的变化特点和发展趋势，选取5、10、22年生小叶锦鸡儿人工固沙群落为对象，以半流动沙丘和天然群落为对照，研究了人工固沙群落发育过程中土壤磷酸单酯酶、蔗糖酶、蛋白酶、脲酶、脱氢酶的活性和微生物生物量C、N、P质量分数的变化特征。

An area of 290 hectares throughout the garden, located in a sand dune, this is a "palace on the sand dunes," said.

整个园林占地290公顷，座落在一座沙丘上，故也有"沙丘上的宫殿"之称。

The results show that: comparing the contrast community(formed by enclosure management for restoring vegetation naturaly on sand-dune for 7 years),some positive aspects of the artificial communities were showed as follows: 1 The level of the species diversity was more higher;2the vertical structure was so complicated that the surface of sand-dune was covered by multiple layers of plants;3 t...

结果表明：1利用植物再生沙障治理流动沙丘可以形成具有多物种、多层片、多层次垂直结构的沙障群落，其水平结构呈网格状沙障结构与障间小群落在空间上镶嵌互补，均衡分布的格局，具有很好的防风固沙和植被恢复效果；2再生沙障建植后第5年开始，沙障群落进入了衰退时期，适时采取科学的经营管理措施对于维持沙障群落的稳定，保障其效益的长期发挥是非常重要的。

The sand dune landscape was not caused by tectonic movement,but by wind and different erosion,and the peat layers were formed in limnological environment in the wind-accumulating dune area.

该区沙山地貌并非新构造运动所致，属差异侵蚀作用的结果，泥炭层由风积地区沙丘间湖沼沉积形成。

Using the survey data of several indexes as well as field experimental data of soil hydrology of microbiotic crusts in artificial vegetation-fixed sand dunes in Shapotou area, the impacts of microbiotic crusts on soil hydrological processes which included the penetration, interception and evaporation processes of precipitation were examined, and their mechanisms were also studied. The security problem of vegetation-fixing system due to the changed soil water environment in fixed sand dune area was analyzed further.

本文在上面的立意下，我们对沙坡头人工植被固沙区对微生物结皮的若干指标进行了详细的调查和试验，并安排了一系列微生物结皮土壤水文过程试验，从不同的角度揭示了微生物结皮在降雨渗透、拦截和蒸发过程中的作用，及其对降水在沙丘土壤剖面中的水分分配过程和格局的影响，并进一步分析了微生物结皮对固沙区土壤水环境的影响和植被固沙体系的安全问题。

Patterns in Nature: Sand A ridged sand dune sparkles under the Nevada sun.

一处山脊沙丘火花在内华达州太阳之下。

Surface-consistent deconvolution using variable prediction step, and suppression of sand dune ringing;2. Spatiotemporal distribution of moisture content in sand dune s of the unirrigated forestation along the southern marginal zone of Gurbantunggut Desert;3. The concepts of sand land, sand dune and desertified land etc.

在实地调查和多年定位研究的基础上，根据目前沙漠化过程研究的需要，介绍了沙地、沙丘、沙漠化土地等相关概念及其主要区别，阐述了沙地、沙丘、沙漠化土地类型的划分标准以及类型互换使用中应该注意的问题；通过分析影响沙漠化发展方向和过程的关键因素，建立了沙漠化正、逆发展过程的地面判别指标体系，并讨论了不同类型沙丘的主要来源、发展方向及转换过程的判别方法。

Approximately 30,000 years ago, long on stable sand dune plant root, passes through the long time the decency, has formed the limestone, after the plant dies, the sand dune unceasing migration, causes these calcifications the limestone to reveal the surface, has formed the stalagmite which the present sees.

大约在3万年前，长在稳定的沙丘上的植物根部，经过长时间的风化，形成了石灰岩，植物死后，沙丘的不断移动，使这些钙化的石灰岩露出地表，形成了现在所看到的石笋。

In the fixed sand dune and half fixed sand dune in shallow groundwater, there are four districts among the soil from the underground watertable to the soil surface.

地下水埋深较大的固定半固定沙丘土壤含水量的总体变化趋势是由上到下逐渐增大。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。