查询词典 soil

After comparison of 30 and 50℃ treatments, AQDS were added into 3 kinds of microorganism biocoenosis from Jiling, Tianjin and Sichuan paddy soil, and it showed that AQDS could accelerate the reduction of Fe 10%-288%, meanwhile, temperature could accelerate the reduction of Fe 6%-17%. In axenic culture treatment of 6 kinds of bacterial strains from Sichuan and Jiangxi paddy soil, the maximum accumulation amount of Fe reduction rate was constant, the maximum reaction rate and ferric reduction rate of ferric strain JX-a08 all increased as temperature rose, which showed that bacterial strain JX-a08 were suitable to 50℃.

在30和50℃培养温度下，来源于吉林、天津和四川的3种水稻土微生物群落添加AQDS可使Fe还原的反应速率常数增加10%~288%，而温度变化的增加幅度仅为6%~17%；对分离自四川和江西水稻土中的6株铁还原菌的纯培养试验发现，菌株JX-a08的Fe最大累积量、还原速率常数、最大反应速率及铁还原率均随培养温度的升高明显增加，表明菌株JX-a08更适于在50℃下生长。

5 kinds of paddy soil treatments were studied, then each microorganism biocoenosis was extracted or bacterial strain was dissociated. Artificial synthesis ferric oxide was considered only electron acceptor, which inoculated soil leaching liquor or bacterial strain with reduction function in mineral salt culture system under anaerobic constant temperature condition. After different temperature treatments towards leaching liquor, temperature was controlled and AQDS added into culture system in order to discuss the effect of temperature and AQDS on ferric oxide microorganism reduction process.

采用5种水稻土为供试材料，分别提取微生物群落或分离铁还原菌株；以人工合成氧化铁作为惟－电子受体，在无机盐培养体系中接种土壤浸提液或具有铁还原功能的菌株，厌氧恒温培养；通过对接种液的不同温度处理(40， 50， 60， 70℃)、对培养温度的控制（30和50℃）以及向体系中添加AQDS，探讨温度及AQDS对氧化铁微生物还原过程的影响。

The relation between soil acidification and nitrogen cycle disturbed by man made factors was studied from the viewpoint of biogeochemical cycle, and the mechanism of soil acidification induced by disturbed nitrogen cycle was probed.

从生物地球化学循环的观点出发，研究了 N 循环的人为干扰与土壤酸化的关系，并探讨了 N 循环扰动下导致土壤酸化的机理。

Water and soil resource are important substantial basic of people's subsistence and development,especially are essential conditions of agriculture production, a mass of water and soil loss became a global bionomics question.

水土资源是人类生存和发展的重要物质基础，是进行农业生产的基本条件，大量的水土流失已经成为不可忽视的全球性生态问题。

Soil biota can change the physical, chemical and biological characters of soil in different ways.

土壤生物以不同的方式改变着土壤的物理、化学和生物学特性。

In this paper, effects of exotic plant invasions on soil biota and soil nutrient cycling processes are reviewed, and the mechanisms that underlie these impacts are discussed.

随着科学家对生态系统地下部分的重视，评价外来植物入侵对土壤生态系统的影响成为当前入侵生态学领域的研究热点之一。

As the important consitutional component of soil biota, fungi play an important role in the process of soil fertilization, structural formation and microbial balancing.

保护地的集约化栽培管理措施对土壤真菌的种类和区系分布也具有明显的影响。

The authors mainly analyzed the cause of formation and the status of soil and water loss in blackland, and using the grey system theory to build a model to forecast the rate of the change about physical and chemical of blacksoil. At the same time,the prevention and cure measures and new technology of monitoring soil and water loss on sloping land in blackland are presented.

就黑土区水土流失的成因及现状进行分析，利用灰色系统理论，对黑土区土壤的主要物理化学性状进行建模预测，预测出未来黑土区土壤的理化性状的变化趋势，同时论述黑土区水土流失的防治及监测的技术研究进展。

At one time, we emphasized the solar radiation transfer mechanics. To advance the estimation precision, in this paper, we classed land cover into four layer, canopy of Robinia pseudoacacia L ,top of Melilotus albus Desr,bottome of Melilotus albus Desr and layer of soil, separately estimated their fluxes of moisture, heat and CO2 ,actualized the separated simulation for each composement in soil-vegetation-atmosphere contimuum.

同时，本次研究强调了太阳辐射在冠层间的辐射传输机制，为了提高估算精度，本文把地表覆盖分为刺槐冠层，草木樨上层、草木樨下层及土壤层四个层面来分别估算其水热及CO2通量，做到了土壤-植被-大气连续体能量及物质通量的分离模拟。

Soil Erosion Assessment and Its Verification Using the Universal Soil Loss Equation and Geographic Information System:A Case Study at Boun,Korea.

地理信息系统在国内外的应用现状。计算机与现代化，1999，61(3)： 52-58。［2］张利华，薛重生。"3S"技术在土壤侵蚀研究中的应用--以湖北省东北地区为例。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。