自然土壤

在自然土壤中以VA菌根菌接种烟草幼苗，测得叶片中N、P、K、叶绿素含量、硝酸还原酶活性及蛋白质含量均高于对照；

Tobacco seedlings were inoculated with VA mycorrhizal fungi in natural soil .

自然土壤冬春季N2O释放通量与温度间存在指数函数关系。

N 2O flux from natural soil in spring and winter was in exponential function with the temperature .

新形成的HMi、HMc的分子结构比自然土壤简单。

The molecular structure of the new formed HMi and HMc were the simplest .

结果表明，广州公园绿地土壤以酸性（pH4.5~5.5）和中性（pH6.5~7.5）占的比例高，部分土壤呈碱性，土壤pH值较自然土壤有增高的趋势；

The results indicated that the soil pH value was dominated by acid ( pH4.5 ~ 5.5 ) and neutrality ( pH6.5 ~ 7.5 ), and had increase tendency as compared with natural soils ;

自然土壤表层（0～10cm）储存了整个剖面土壤有机碳总量的30%左右。

Some 30 % of total soil organic carbon of natural soil profiles has been stored in the upper horizons ( upper 10 cm ) .

比自然土壤降低96.1%和95.0%。0～60cm土层城市土壤全氮、速效氮降低；

The total nitrogen and rapidly available nitrogen of city soil at the depth of 0 ~ 60cm soil layer was decreased .

垦后Al-P总量较自然土壤增加1.87-35.1%，且从Al-P的绝对量和相对量来看，都有随开垦年限增加的趋势。

The quantity of Al-P was increased 1.87-35.1 % compared to virgin after reclamation . The absolute and relative amount of Al-P was increased with reclamation .

应用美国通用土壤流失方程（USLE）和土壤侵蚀预报模型（WEPP）中的土壤可蚀性K值，对四川各类自然土壤和旱耕地土壤可蚀性特征进行了研究。

It studies the texture of erodibility of varies natural soil and non irrigated soil in Sichuan by applying K value of soil erodibility of USA Universal Soil Loss Equation ( USLE ) and soil erosion forecasting model ( WEPP ) .

指出自然土壤介质下，XCT是根系三维构型定量化分析未来的发展趋势。

It was suggested that applying XCT to quantitatively analyze the three-dimensional root system architecture in natural soil media would be the development trend of related researches in the future .

主要研究结果如下：1.采用自然土壤法，研究Phe、Pyr单一及复合污染对赤子爱胜蚓（Eiseniafoetida）的急性毒性效应。

Effects of combined pollution between Phe and Pyr were also studied . The results are showed as follow : 1.The toxic effects of single and joint stress of Phe and Pyr on earthworms ( Eisenia foetida ) were investigated by natural soil tests .

用导磁粉末模拟自然土壤的实验研究

Experimental study on simulating behavior of natural soil with magnetic powder

自然土壤中苯酚降解菌的分离和系统发育分析

Isolation of Phenol-Degrading Bacteria from Natural Soil and Their Phylogenetic Analysis

自然土壤中碱性磷酸酶活性状况研究

Study on Activity of Alkali Phosphatase in Natural Soil

全球气候变化对自然土壤碳、氮循环的影响

Effects of global climate change on C and N circulation in natural soils

自然土壤环境下脐橙植物体稀土累积特征

Accumulation Features of Rare Earth Elements in Navel Orange Plant and Natural Soil Entironment

四川自然土壤和旱耕地土壤可蚀性特征研究

Study on Characteristics of Erodibility of Natural Soil and Non - Irrigated Soil of Sichuan

公园和街道绿地的土壤酸碱度均高于自然土壤和农业土壤；

The pH of soil in parks and streets are higher than in natural or agricultural soils .

耕作活动导致扰动土壤有机碳储量比自然土壤增加29.35%；

The increase in soil organic carbon storage is about 29.35 % for the disturbed soil after 25-year cultivation ;

与自然土壤相比，物理、化学和生物等性质都发生了显著的变化。

Compared with the natural soils , the physical , chemical and biological properties of the urban soil have occured significant changes .

采用滤纸接触法和自然土壤法研究了毒斯乐对自然蚯蚓的急性毒性。

Two methods ( the contact filter paper method and natural soil method ) were used to study the acute toxicity of chlorpyrifos to earthworms .

水稻土是自然土壤在人为水耕熟化过程中形成的特殊人为湿地土壤，也是我国最重要的农业资源优势与特色。

The paddy soil is one of the most important soil resources of China , which is an artificial wetland soil under long-term paddy management .

研究结果表明：①广州城市街道和公园林地土壤的平均容重明显高于自然土壤的平均容重。

The results showed that : ( 1 ) soil densi-ties of urban roadside and park forests were higher than mean density of natural forest soil .

结果表明，城市土壤磁化率平均值大于非城区自然土壤，而频率磁化率平均值小于非城区自然土壤。

The results showed that the magnetic susceptibility of urban soil was higher , and the frequency-dependent susceptibility was lower as compared with those of natural soil .

农田土壤长期受到人类干预，与自然土壤相比，其与大气之间的碳交换强度更大。

As a kind of special soil , compared with natural soil , cropland is significantly disturbed by human activity , which large consequential carbon stock transfers with atmosphere .

人工土快滤处理技术是在原快滤处理系统上采用人工土作为多孔介质代替原有的自然土壤的污水土地处理技术。

Artificial soil rapid infiltration ( ASRI ) is a kind of newly advanced technology using artificial soil instead of natural soil as porous filter media in the rapid infiltration system .

通过对北京市菜地、稻田、果园、绿化地、麦地以及自然土壤6种土地利用类型共609个土壤样品的调查分析，探讨了不同土地利用方式下土壤铜的积累特征。

To investigate soil copper accumulation under different land use types , Cu concentra-tions of 609 soil samples from vegetable field , paddy field , orchard , greenbelt , cornfield and natural soils in Beijing were taken and analyzed .

由此认为，土壤粗粒矿物的组成特性，尤其是粗粒氧化铁矿物，与粘粒矿物一样反映了相应的土壤发生环境和过程，可作为自然土壤发生分类的一项参考依据。

According to the results obtained , the compositions of soil coarse fraction , especially iron oxide minerals like clay mineral reflected their respective soil environments and genesis of soil , and may be used as a referential index for soil classification .

结果表明，土壤微生物的数量和分布受多方面因素的综合影响，不同土壤类型土壤微生物的数量不同，农田土壤差异不明显，自然土壤中土壤微生物数量有较大差异；

The result showed that quantity and distribution of soil microbe are affected by many factors . Quantity in every kind of type soil is different . The farmland soil difference is not obvious , but it is obvious in nature soil .

自然土壤中，所有浓度组rac-甲霜灵与R-甲霜灵蚯蚓的体重增长率都明显低于人工土壤中。

The weight change rate of earthworms treated with R-metalaxyl was less than that of rac-metalaxyl treatment . In artificial soil , the weight change rate treated with rac-metalaxyl and R-metalaxyl was significantly lower than that in nature soil all the concentration groups . 5 .

在自然土壤中生存着大量的微生物群，它们能较敏感地预测土壤环境的变化，如土壤有机质的变化过程，因此，土壤生物活性常被用作衡量土壤质量的灵敏指标。

There have lots of microbes in the natural soil , and they can forecast sensitively the changes of soil environment , for example , the change course of soil organic matter . So , soil biological activity is regarded as a sensitive index to measure soil quality .