查询词典 loess

The daily dynamics of photosynthetic characteristics of alfalfas grown for different lengths of time in the Loess Plateau were monitored using a Portable LI-6400 Photosynthesis System.

利用Li-6400型光合作用测定系统，测定了不同生长年限苜蓿叶片的光合参数。

Rocky desertification, loess, desert and frozen soil are the fragile ecological area of west China, which astricted the sustainable development of the area.

喀斯特地貌石漠化和黄土、荒漠、冻土等并称为中国西部的四大生态环境脆弱带，是限制可持续发展的一个十分重要的因素。

The design of mixing new additives with loess to promote the efficiency of rainwater catchments materials was put forward.

同时 ，对照其它几种集雨材料，对不同雨强、雨量及坡度下的起流历时、集流效率和材料性能进行了比较。

In this study, we used the hill and gully area of the Loess Plateau, Inner Mongolia, where soil and water erosions continue to be responsible for much of the environmental problems in eastern China because of its fragility and long disturbance history. In this study, we developed an assessment method of indi...

最后，从自然生态学角度，结合研究区的实际情况，对该区域的生态系统健康恢复途径、生态系统管理和可持续发展策略提出了一些具有针对性的建议和措施，并对生态系统健康评价的进一步研究进行了展望。

Soil samples were collected from a 17-year fertilization experiment site in southern Loess Plateau to study the effects of different fertilizations and fallowing on the characteristics of soil nitrogen mineralization, and the transformation of exogenous NO3(superscript -)-N in sterilized and non-sterilized soil samples.

以黄土高原南部17年长期定位试验不同处理土壤为研究对象，研究了不同肥料处理及撂荒条件下土壤氮素矿化特性、灭菌与不灭菌条件下不同肥力土壤对施入外源硝态氮转化的影响。

The paper describes the interior stability analy sis on slope of deep excavation pits in loess soil.

讨论了黄土类深基坑开挖边坡土钉支护结构内部稳定性分析计算和设计方法。

Now some researches in regional LUC are being carried out mainly in the areas of the tropical rain forest, the loess plateau, the karsts and in the economically developed areas; but the researches bearing the global and regional features in the intensive farming areas, Zhujiang Delta and in such economically-developed areas as Suzhou, Wuxi and Changshu are not enough; practically the researches in western ecologically fragile areas in China are much less.

目前正陆续开展一些有关区域土地利用变化的研究项目，这些研究主要集中在热带雨林区、黄土丘壑区、喀斯特地区、经济发达区，但选择兼具全球意义和区域特色的局地进行土地利用变化的研究更少，其主要集中于集约化农区、珠江三角洲和苏锡常经济发达区，很少涉及我国西部生态脆弱区。

The landslips are divided into new, old and ancient ones by periods, and divided into shallow layer loess and deep shearing ones by the material composition, depth and position of the sliding mass.

通过对甘肃中东部大量地震滑坡的成灾机制分析，按形成时代将滑坡分为新滑坡、老滑坡和古滑坡；按物质组成、滑体厚度及滑床位置又可分为浅层黄土滑坡和深层切层滑坡。

Levins's and Shannon-Wiener niche breadth formula and Pianka's niche overlapping formulae are adopted to quantitatively study the niche breadths and overlapping feathers of major plant species in Malan forest standing in the Loess Plateau as well as analyze the niche patterns of these major plant species following their successions.

应用Levins、Shannon-Wiener生态位宽度公式和Pianka生态位重叠公式，定量研究了黄土高原马栏林区主要植物种的生态位宽度和生态位重叠特征，同时对主要种在演替系列上的生态位变化规律进行了分析。

Taking Minhe area, especially the Heifang platform for example, the effect causes by irrigation in are analyzed. And for the sustainable development of agriculture in loess plateau, some agricultural measurers are put forward, such as advanced water saving irrigation techniques, optimizing the agricultural configuration, combining with project to improve the geological environment.

以民和地区，尤其是区内生态地质问题严重的黑方台为例，论述了黄土高原农业灌溉对生态地质环境的影响，提出从治水入手，改进灌溉方式，优化产业结构，并配合工程措施、生物措施以改善农业地质环境，促进黄土高原农业可持续发展。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。