黄土的

This paper explain the results and suggests that the upper part of the section is normal loess/paleosol series, while the lower part is redeposited loess and paleosols.

结合该剖面的岩石磁学性质与该区域其他剖面以及洛川剖面的对比，本文的解释是该剖面上部为正常的黄土古土壤序列，而底部为再搬运沉积的黄土古土壤。

Combined a large number of on -site investigate and survey data of loess area in the north of Shaanxi Province, the paper analyzed the influence factors and interrelationship of slope erosion, then put forward the main influence factors , the peculiarity of outwash destructions the main style and protective measures about slope erosion of highway in loess area. The first: the emphasis about protective measures of cut-slope are the selection of rate of grade, the place of plain stage of slope, the slope protection; the second: the emphases about drainage of cut-slope is the rational installation and mating of drainage establishment; And following this principle: the effective holding up , the rapid obviating, the smooth articulation, the seepage prevention and prevent erosion.

根据陕北黄土地区公路的大量现场调查和实测资料，分析了公路边坡冲蚀的影响因素及其相互关系，提出了黄土地区公路边坡冲蚀的主要影响因素、冲蚀破坏特点、主要类型与防护对策，得出：1、路堑边坡坡面冲蚀防护重点是坡率选择、边坡平台设置、边坡防护；2、路堑边坡排水重点是排水设施的合理设置与配套；并遵循有效拦截、迅速排除、衔接顺畅、防渗防冲等原则。

In loess hilly-gully region covered by sheet sand,soil water erosion process is different from typical loess hilly-gully region because of worse natural environment and loose land surface material.

文摘：在片沙覆盖的黄土丘陵区，由于恶劣的自然环境及松散的地表组成物质，土壤的水蚀过程明显地不同于典型的黄土丘陵区。

It not only arains natural resources day by day and decreases the biological diversity,but also seriously prevents the Loess platean's area econnomy from developing continuingly,then threatens the local people's living and development,thus,the study and governing of biological degeneration should be regarded seriously.

中文摘要：摘要：生态退化是目前黄土高原所面临的主要环境问题，它不仅使自然资源日益枯竭、生物多样性不断减少，而且还严重阻碍黄土高原地区经济的持续发展，进而威胁当地人民的生存和发展，因此，对生态退化的研究和治理应给予万分的重视。

Balladry civilian is a day with feeding, chinese farmer is forever on loess ground rehabilitate, they use their arduous sweat, dare be with laborious He Yong in loess ground dig is fed, they are like willing ox on loess ground hard land is cultivated, sow, breath, the hope trades the get one's own back of a land, long to come the joyance of the bumper harvest.

民谣民以食为天，中国的农民世世代代在黄土地上休养生息，他们用自己辛勤的汗水，用勤劳和勇敢在黄土地里刨食，他们又像老黄牛一样在黄土地上艰难地耕耘、播种、喘息，希望换来一份土地的回报，盼来丰收的喜悦。

The lithologic characters changed from fluviolacustrine sandstone to aeolian Red Clay with thin interval of greyish-white sand layers at the depth of 602 m. It can be inferred from the rock strata and age that the development age of aeolian sequence in Lanzhou area was 7 Ma at least, which is in accordance with the bottom age (7~8 Ma) of the aeolian sequence of the eastern and central Loess Plateau, suggesting that their accumulation processes are unitary.

皋兰山剖面深度602 m处出现由河湖相砂岩向以风成红粘土为主常夹有薄层砂岩的地层转变，通过岩性地层及年代的推断，兰州地区的风尘序列堆积发育的年代至少为7 Ma，与黄土高原风尘序列堆积底界8～7 Ma基本一致，说明了兰州地区与黄土高原在风尘序列堆积过程中具有统一性。

In order to study the finger flow phenomenon during ponded infiltration process in layered soil, an experimental study was carried out to observe the occurrence, mechanism and environment of finger flow in six soil columns which have different grain sized sands overlain by loess soil.

根据层状结构土壤在积水入渗过程中存在发生指流的现象，该文针对黄土地区&垆盖砂&的土壤条件，在室内以西安黄土为主体，对6种不同粒径的砂质双层结构土壤进行积水入渗试验，以观测研究发生指流的现象、机理与条件。

Planted forests can deplete deep soil water, forming an obstacle to sustainable land use in the semi-arid area of Loess Plateau. The purpose of this study was to examine effects of grazing and cropping on replenishment of deep soil water where forest plantations had depleted soil moisture at depths of 2～9.9 m. We compared soil moisture on plantation plots with that on plots where plantations were replaced by crops, grazed grassland, and ungrazed grassland seperately.

为了研究黄土丘陵半干旱区人工林迹地土壤水分恢复情况，该文以正在生长的人工林土壤水分含量为人工林迹地土壤水分恢复的起点，并分别以持续农地和持续放牧荒坡的土壤含水量为林后农地和草地土壤水分恢复的上限，对位于黄土丘陵半干旱区绥德县境内的人工林迹地土壤水分恢复情况进行了研究。

On the basis of long-term experiment, changes in soil organic C, N and dynamics of soil NO〓-N of cropping systems were investigated in gully area of the Loess Plateau by means of analysis of the 15-year soil samples, crop yield in following crop systems: 1 continuous winter wheat with unmanured , nitrogen, organic manure , phosphorus and organic manure , nitrogen and phosphorus , nitrogen, phosphorus and organic manure , 2 continuous alfalfa, 3 pea-winter wheat rotation, winter wheat-sainfoin rotation, and 4 bare fallow. A model was developed according to the organic C dynamics, and was tested by the long-term experiment.

本文以中国科学院长武试验站的长期试验（始于1985年）为依托，通过对典型处理8-15年的土壤养分、作物产量以及同期降水量等的系统分析，揭示了黄土旱塬区不同种植体系中土壤有机碳、氮的演变规律；阐明了长期施肥条件下土壤硝态氮的迁移积累机理；提出了目前水肥条件下黄土旱塬区冬小麦生产潜力及其提高途径。

Therefore, doing research of the nutrient balance in the loessplateau has its practical signification. Using the long-term rotation and fertilization experiment that disposed in dry land on theloess plateau, the paper has studied nutrients in rainfall import to farmland ecosystem andAmmonia volatilization losses and nutrients disbursal of crop, also estimated the balance ofnutrients in farmland soil.

本文利用设在黄土高原旱地上的长期轮作与施肥试验，主要研究了黄土高原农田生态系统养分的降水带入、作物地上部分的氨挥发损失和作物的养分支出，并进行了 N、P、K 养分平衡评价。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。