查询词典 infertile soil

The results show that 42.86% topsoil samples are polluted by Cadmium, soil synthesis pollution index is moderate, Cadmium pollution degree of topsoil correlate with the environment of sampling sites. The results also show that exchangeable Cd, carbonate-bound Cd, organic-bound Cd and residual Cd are found in all soil samples except for Fe-Mn oxide-bound Cd. Furthermore, the concentration of exchangeable Cd and carbonate-bound Cd, both which have high biological validity, is high. Humus has a certain correlation with exchangeable Cd, organic-bound Cd and residual Cd, and has no obvious correlation with other chemical speciations. Any chemical speciation of Cd has no obvious correlation with pH and total Fe of soil samples. Cadmium in topsoil can be eluviated by acid solution, the quantity of Cadmium eluviated by redistilled water is little. With the rise of pH of eluviating solution, eluviated Cadmium quantity decrease. For the same soil sample, the lower pH value of eluviating solution is, the more fast the Cadmium is eluviated, and the more thequantity of Cadmium is eluviated.

研究结果表明：成都市表生土壤样中有42.86%受镉污染，镉综合污染水平达中度污染，成都市表生土壤镉污染程度与采样点周围环境表现出一定的相关性；除铁锰氧化物结合态镉在部分土壤样中未检出外，所有土壤样均含有可交换态镉、碳酸盐结合态镉、有机结合态镉、残留态镉，且生物有效性较高的可交换态镉和碳酸盐结合态镉占总镉量比例较高；成都市表生土壤中的腐殖质与可交换态镉、有机结合态镉、残留态镉有一定相关性，与碳酸盐结合态镉、铁锰氧化物结合态镉相关性不显著；各形态镉与土壤pH值和全铁的相关性均不显著；土壤中的镉可被酸溶液淋出，重蒸馏水淋出镉量十分微小；随着淋滤液pH值的升高，土壤样的镉淋出量下降，且0～5小时时段的镉淋出量占镉总淋出量比例下降，5～30小时时段的镉淋出量占镉总淋出量的比例上升，对同一土壤样而言，酸度大的淋滤液比酸度小的淋滤液淋出镉速度更快，淋出镉量更大。

Results indicated that furrowing can make the soil of the ridge looser and soil porosity larger, so favoring the aeration and water permeability of soil, enlarging the storage capacity of soil water.

结果表明，起垄可使垄背土壤变得疏松，孔隙度增大，有利于土壤通气透水，增加土壤水库容。

5The different intercrops had different effects on soil physic-chemical characteristics. Soil bulk density、soil organic matter and soil available nitrogen were improved significance by intercropped cotton.

不同间作物对林木高生长没有产生显著差异，但对胸径生长的影响达到了显著性差异水平，间作棉花在第一年促进了三倍体毛白杨胸径的生长。

The route of the tunnel traversed three types of soils (I - fill soil underlain by dense sands; II - fill soil underlain by heavy clays; IIIa - fill soil underlain by loose sands; and, IIIb - fill soil underlain by highly plastic clayey loams).

这条路线的隧道走过了三种类型的土壤（I-fill 密集的砂岩土；II-fill重粘土； IIIa-fill松砂土； IIIb-fill高塑性的粘性土）。

It has become the historical task of dynamics of rock and soil mass to study the relationship between synthetic physical properties and dynamic response of rock and soil mass, consummate the theory and methodology of dynamics of rock and soil mass, and accelerate the formation of subject system of dynamics of rock and soil mass crossed and osmosed by many other relative sciences so as to meet the demand of sustainable development of mankind society.

进行工程岩土体的综合物性与动力反应的系统研究，完善工程岩土体动力学的理论和方法，促进多学科交叉渗透的岩土体动力学学科体系的形成，以适应人类社会可持续发展的需要，已成为岩土体动力学研究的历史任务。

Cm.℃.min-1,0.344 J.-1 and 0.311 J.-1.The average thermal diffusivity is 0.244～0.247cm2.min-1.By pressing soil and using lichen coat,the reforesting technique of catchment can lighten the bad effect of nudity soil,and can lower down average topsoil temperature by 0.2～1.5 ℃, maximum topsoil temperature by 2.7～4.0 ℃, topsoil temperature amplitude by 2.5～3.7 ℃, and depress 11%～25%soil thermal flux and 4%～15%soil evaporation.

拍光压实后喷涂引植地衣、苔藓，可有效缓解地表裸露后产生的负影响，在生长季可降低表层均温0.2～1.5 ℃，降低最高表层土温2.7～4.0℃，降低表层土温日较差2.5～3.7 ℃，降低土壤热通量11％～25％，有效降低土壤蒸发4％～15％。

The δ〓C values of soil CO〓 become gradually light with depth increasing and are stable at certain depth; The δ〓C values of soil respired CO〓 are within the δ〓C values of soil CO〓; The δ〓C values of soil respired have same changing pattern with that of plants.

土壤剖面上CO〓的δ〓C值自地表向下逐渐变轻，在一定深度后大致趋于稳定；土壤呼吸CO〓δ〓C值位于土壤CO〓δ〓C值的变化范围；土壤呼吸CO〓δ〓C值的变化规律和植被δ〓C值的变化在空间上具有一致性。

6Moreover measures to control acid rain by liming in polluted area to neutralize resulted in reducing averagely 0.13 pH of soil, and the element content in soil had been improved gradually. The number of microbes had been increased in the No.2, No.3 and No.4 plots in polluted area. The quantity of bacteria had sored to 8.0×109per kilogram soil and N2-fixing bacteria also get 2.5×107per kilogram soil in Spring.

其中最理想的施石灰量为20-30Kg／100m~2，施石灰可中和土壤酸性，pH平均升高0.13，使土壤有机质、有效P、K等增加，并使林下土壤微生物数量增多；在春季，细菌数量达到8.0×10~9个／Kg干土，固氮菌达2.5×10~7个／Kg干土，从而促进了林分生长。

In present study,~(60)Co γ-rays was used to irradiate soil with doses of 3.0 kGy and 25.0 kGy,respectively,to discriminate between arbuscular mycorrhizal fungi and other soil microorganisms,while soil without irradiation was used as control to study the effects of soil microorganisms on uptake of ~(89)Sr by ryegrass and bahia grass.

用3.0和25.0 kGy剂量的60Coγ射线分别对供试土壤进行了辐照处理，以区分土壤中的内生菌根菌和其他土壤微生物；并以未经辐照处理的土壤为对照研究了土壤微生物对黑麦草和百喜草吸收89Sr的影响。

In present study, ^60Co γ-rays was used to irradiate soil with doses of 3.0 kGy and 25.0 kGy, respectively, to discriminate between arbuscular mycorrhizal fungi and other soil microorganisms, while soil without irradiation was used as control to study the effects of soil microorganisms on uptake of ^89Sr by ryegrass and bahia grass.

文章摘要：用3.0和25.0kGy剂量的^60Coγ射线分别对供试土壤进行了辐照处理，以区分土壤中的内生菌根菌和其他土壤微生物；并以未经辐照处理的土壤为对照研究了土壤微生物对黑麦草和百喜草吸收^89Sr的影响。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48