查询词典 soil

The study show that the frozen earth in this area is mainly silty clay. The content of the dissolvable solt is relative high,which is 12.01%, and the main salinity is NaCL and KCL. The research also revealed that frozen intensity would ascend jumpily when the water contend in the soil reached its optimization( 10.61%) and kept rising,and this phenomena got more obvious with the decrease of the temperature. Between 0C and 10C, the frozen intensity vared very obviously, when the temperature is under -10C, the variety of frozen intensity got gently, and the change is not obvious. The frozen strength was influenced by the solution thickness in the soil hole.when the thickness increased, the frozen intensity decreased.

研究表明：那曲河地区冻土区冻土主要为颗粒较细小的粉质粘土：土样易溶盐含量较高，为12.01％，主要盐分为氯化钠NaCL和氯化钾KCL；该地区冻土土内水分达到最优含水率10.61％并继续增大时，冻结强度有个跳跃式的上升，这种现象随着温度的降低而愈明显；由0℃到-10℃时，冻结强度变化十分明显，温度下降到-10℃以后，冻结强度变化趋于平缓，变化不甚明显；冻结强度受土样孔隙中盐溶液浓度的影响，盐溶液浓度增加，冻结强度减小。

Exploiting new water and soil resources, improving water and soil use efficiency and digging up the potential of water and soil are important to develop modem forest production. The common feature of building new shelter belt system in different areas with extra emphasis on different facets of forestry is to combine ecologic benefit, economic benefi and social benefit into one. It fully gives expression to the common requirement of modem oasis forestry and modem agriculture.

开发新的水土资源，提高水土资源的利用效率，挖掘水土潜力发展现代林业生产；将生态效益与经济、社会效益结合，不同地区又有所侧重，是建立新防护林体系的共同特点，充分体现出现代绿洲林业及现代农业的共同要求。

Taking a winter wheat field (4 400 m2) of Jinghai county seed farm as experimental plot,sampling by regular grid with with 10 m ×10 m grids,48 sample points were oriented by GPS receipt machine to analyze soil water content at the depth of 0~20 and 20~40 cm in pri-winter,jointing stage and filling stage of winter wheat.The spatial distribution map of soil water of the winter wheat field using geostatistical analyst model of ARC/INFO was drew.And the spatial variability of soil water in vertical and horizontal direction was analyzed.The results could offer scientific evidence for the deciding of the exact time and quantity for winter irrigation.

以天津市静海县良种场内一块长约110m，宽约40m的冬小麦田作为试验区，采用规则格网采样，按照10 m ×10m设置格网，共设48个采样点，通过GPS手持机进行定位，分别于小麦越冬前、拔节期、灌浆期，利用便携式土壤湿度数据采集器对试验地各个采样点0~20、20~40 cm 2种深度土壤含水量进行了测定，利用ARC/INFO的地统计分析模块绘制了冬小麦3个不同生育期试验区土壤水分空间分布图，并分析了其垂直和水平方向的空间变异特征，以期为确定最佳灌溉时机和灌溉量提供科学依据。

The results indicated that the surface salt contents in the spring of 2006 were the highest among the three samplings, the surface soil salt contents declined from spring to summer of 2006, and the change of surface soil salt contents was not obvious from summer to autumn/winter of 2006. The variation of surface soil salt contents was related to rainfall greatly.

土壤盐分浓度的变化与降雨量有密切关系，虽然2006年降雨偏多，但佛山市南海区农业集约化水平较高，部分菜地连年种植蔬菜、复种指数极高、化肥施用量偏大，从而在遇到干旱年份和季节，集约化露天菜地土壤仍有发生次生盐渍化的风险。

Uses the soil bonsai to carry on the root nodule bacteria and the alfalfa highly effectiveparagenesis match experiment, in the simulation production practice the big field soil environment,conducts the research to the root nodule bacteria in soil compatibility.

采用土壤盆栽进行根瘤菌与紫花苜蓿高效共生匹配试验，模拟生产实践中大田的土壤环境，对根瘤菌在土壤中的适应性进行研究。

At growth period of Moso bamboo, because the root has not grown completely and has little influence on rhizosphere soil, so the score was the highest. The score of rhizosphere soil decreases as the growth and root gradual development of Moso bamboo. The rhizosphere soil quality increased at later stage of Moso bamboo because of gradually weakened growth and the increased litter and microorganism activity.3.The demands for nutrients of Moso bamboo at different growth periods were different. It was different in the demand for nutrients of Moso bamboo at different growth period.

成竹期由于根系未完全形成，对其根际土壤的影响较小，因而成竹期得分最高，随着毛竹生长，根系渐渐发达，对其根际土壤的影响日渐扩大，造成根际土壤得分渐低，后期毛竹生长逐渐减弱，对其根际土壤的影响也随之减少，加上林中凋落物的增加和微生物活动增强，其根际土壤的质量有所增加。3、不同生长阶段毛竹对营养元素的需求有所不同。

The spatial heterogeneity of soil water in alpine meadow is found to be the highest, and that of the soil water in alpine shrub is comparatively low. What is more, the spatial heterogeneity of soil mater in desert grassland shows an unstable trend influenced by many outside factors.

结果表明，高寒草甸土壤水分的空间异质性最高；而高寒灌丛的较低；沙化草地的空间异质性受到多方面外界因素的影响而表现出不稳定的态势。

In order to explore the effects of different forest types on soil active carbon pool,the content and density of soil organic carbonwere studied in different soil horizons under typical coniferous and broadleaved forests in the mountainous area of Beijing.

为探讨不同森林植被类型对土壤活性有机碳库的影响，以北京山地典型针叶林和阔叶林为对象，对土壤有机碳含量与密度进行研究。

Its main advantages are: 1 Ploughshares former can Geng Sada narrow, sharp-angle, and then a small field can be competent. 2, spiral Ploughshares high-speed rotation, tillage Shulan soil formation, may omit rake mud, soil and other pressure Suitu site preparation process. 3, spiral Ploughshares work will push the soil later, will pull the machine forward traction, it can effort can be smaller engine-driven. 4, the spiral Ploughshares work itself traction to overcome the original style, to break through resistance to the plow, the machine tray can be fitted with the lower part of farming feet deep mud paddy field. 5, the spiral Ploughshares put on the handling round, you can use the drive shaft Ploughshares handling round, 20-30 cm wide in the small mountain ridge or drive to complete removal. 6, according to the plane of principle, can also be designed as a multi-Ploughshares, or a variety of forms, suitable for large-scale farming machinery Plain.

它的主要优点是：1、犁头在前能耕狭田窄地，田尖地角，再小的田地都可胜任。2、螺旋犁头高速旋转，被耕泥土熟烂平整，可省去耙泥、压土等碎土整地过程。3、螺旋犁头工作时将泥土往后推，有将机器往前拉的牵引力，因此可以省力，可用较小的发动机驱动。4、由于螺旋犁头工作时本身有牵引力，克服了原式华犁的对闯阻力，在机器下部装上托盘就可耕作深泥脚水田。5、把螺旋犁头换上小搬运轮，就可利用犁头轴的动力驱动搬运轮，在20—30厘米宽的小山路或田埂上行驶完成搬运。6、根据该机工作原理，还可设计成多犁头或各种形式，适合平原的大型耕作机械。

SRL was slightly higher of white maize and black maize in Cd and pyrene contaminated soil than that in uncontaminated soil. SRA, ARD and SRV of white maize and black maize decreased in Cd and pyrene contaminated soil compared to control, but the difference was not significant between the two treatments.

与未污染相比，Cd+芘复合污染下白玉米和黑玉米的根长稍有增长，根表面积、根平均直径和根体积减小，但两处理间差异不显著。

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。