棕壤

总体来看，暗棕壤烟叶化学成分协调性最优。

Overall , the chemical compositions in tobacco leaf were optimal of dark brown forest soil . 6 .

无论是连续浸提还是淋洗两种方式都充分说明暗棕壤中有着相当可观的可被有机酸（草酸和柠檬酸）释放的磷。

Both repeated sequential extraction procedures and leaching procedures could fully show that , considerable P could be released from Dark Brown Forest Soil while extracted by organic acids .

pH对黄棕壤重金属解吸特征的影响

Effect of pH on desorption of heavy metals from yellow brown earth

不同pH下黄棕壤镉的吸附-解吸特征

The characteristics of adsorption-desorption of Cd in yellow brown earth with pH

pH和磷酸根对砷（Ⅴ）在棕壤上吸附解吸的影响

Effect of Phosphate on Arsenate Adsorption by Brown Soil

Cd和Cu在草甸棕壤-植物系统中行为特性的研究

Behavioral characteristics of Cd and Cu in meadow brown soil-plant system

外源水溶性Cd在棕壤中的迁移和形态转化

Transportation and Form Transformation of Water Soluble Cadmium in Brown Earth

中国东北林区棕色针叶林土壤和暗棕壤的N养分差异性

Comparison of Nitrogen Nutrient in Brown Coniferous Forest Soil and Dark Brown Forest Soil in Northeastern China

氮肥对潮棕壤稻田N2O排放和土壤无机氮素的影响

Effects of N fertilization on the N_2O emissions and soil nitrogen in aquic brown soil

土壤保肥-供肥机理及其调节Ⅲ.棕壤型菜园土的N素保持与供应

Mechanism of nutrient preservation and supply by soil and its regulation ⅲ . N preservation and supply by brown earth type vegetable garden soil

采用实验室土柱法研究了外源水溶性Cd在棕壤中的迁移和形态转化。

Transportation and form transformation of water-soluble cadmium in brown earth was simulated by virtue of laboratory soil column test .

将该模型应用于土壤体系，上述参数较好地解释了金属Cu、Zn在红壤、黄棕壤、灰潮土上的吸附特点。

The model was applied to the adsorption of Cu and Zn on red soil , Yellow-brown soil and grey chao soil .

棕壤、暗棕壤及草甸土的H／F值相比较，以暗棕壤最大，草甸土次之，棕壤最小；

The H / F ratio is the highest for dark brown soil , while the smallest for brown soil and intermediate for meadow soil .

应用X射线衍射和化学分析等手段研究了红壤、砖红壤和黄棕壤中氧化铁类型及其与磷吸附和解吸的关系。

The types of Fe oxides and their relation to phosphate adsorption or desorption on clay fractions were investigated by means of XRD and chemical analysis methods .

有机质含量对棕壤表面电荷及NH4~+的吸附解吸特性的影响

Effect of organic matter content on surface electric charge and NH-4 ~ + adsorption-desorption characteristics in brown soil

应用田间试验和盆栽试验，研究Cd、Pb、Cu、Zn、As复合污染在草甸棕壤上对水稻产量及元素含量的影响。

The ecological effects of Cd , Pb , Cu , Zn and As on lowland rice were studied in brown earth in the pot and field experiments .

对暗棕壤和黑土来说，微生物减小了Hu芳香化合物的量，促使Hu的氧化度升高。

Dark Brown Soil and Mollisols , the microorganisms reduce the amount of the Hu aromatic compounds , prompted Hu degree of oxidation increased .

黄棕壤吸附磷酸根后对Cu2＋吸附反应的速率下降；

After phosphate adsorption , for yellow brown soil , the rate of Cu2 + secondary adsorption reaction decreased ;

根据研究结果认为，这种土壤的土体上部黄化是由于古红土中赤铁矿转化为针铁矿引起的。B层有棕化作用和粘化作用，应属棕壤类。

On the basis of present study it was suggested that the color tran - sition of red to yellow in the upper B horizon of the profile be due to the transformation of hematite to goethite .

棕壤各粒级微团聚体及组成成分对Cu～（2+）、Cd～（2+）吸附特性和吸附机制影响的研究

Analysis of Adsorption Character and Mechanism of Cu ~( 2 + ) Cd ~( 2 + ) on Component in Brown Earth and Several Different Particle Fractions of Microaggregates Extracted from It

长期地膜覆盖对棕壤剖面中NH4~+-N和NO3~&N动态变化的影响

Effect of Long-term Covering with Plastic Film on NH_4 ~ + - N and NO_3 ~ & N in Depth Profile of Brown Earth

不同处理下淋溶五次以后，棕红壤淋出液pH低于黄棕壤，可能与土壤pH与CEC含量有关。

After five leaching , leaching solution pH of brown-red soil was lower than yellow-brown , which may be related to the content of pH and CEC in the soil . 3 .

在连续盆栽水稻、小麦的过程中研究了加入黄棕壤的Cu、Cd、Pb的毒性（发光细菌法）。

The toxicity of yellow-brown earth added with Cu , Cd , or Pb was researched using the MICROTOX method in the process of successively growing of paddy and wheat in a pot experiment .

结果表明，pH低的酸雨使棕壤严重酸化且有活性铝测出，但对褐土的影响相对较轻。

The results show that acid rain with low pH can badly acidify brown soil , and activated Al can be detected in the leacheate , but comparatively the effects to cinnamon soil on pH are not obvious .

它导致黄棕壤Al-P减少，O-P和Ca-P增加；

As for yellow brown soil , Al-P decreased , while O-P and Ca-P increased .

除连续2年施用大量有机肥的草甸棕壤土样中Hg对中性磷酸酶有显著的激活作用外（P<0.05），其它土样无显著变化，表明中性磷酸酶活性对Hg污染反应不敏感。

Soil neutral phosphatase was not sensitive to Hg contamination , except that it was significantly activated by Hg in the meadow brown soil applied with plenty of organic fertilizer .

第二部分：在恒温和除氧封闭条件下，通过批式试验研究了红壤、黄棕壤和黑钙土三种土壤对硫化物还原Cr（Ⅵ）的反应动力学。

In chapter ⅱ, at constant temperature and in anaerobic conditions , the kinetics of chromium (ⅵ) reduction by sulfide was studied in three soils ( red soils , yellow-brown soil , chernozem ) in batch experimental systems .

采用Bowman和Cole提出的有机磷分组方法，对施入外源腐殖酸条件下，不同时期棕壤有机磷的组成变化进行测定。

Variation of brown soil organic phosphorus fractions in different periods after application of outside source of humic acid were studied with Bowman-Cole method .

结果表明：经过14d培养后，茶叶轻微降低红壤和盐土的pH，对黄棕壤的pH没有影响；

After 14 d incubation with tea powder and rice straw powder red soil and salt soil showed a slight decrease in the pH value , while yellow brown soil remained the original pH value .

本试验结果表明：在黄棕壤、两合土、沙土3种土壤中均有VA菌根真菌的存在，都以球孢霉属（Glomus）为主，以Gl。

The results of the study showed that VA mycorrhizal fungi were present in all 3 soils . Most species belong to the genus Glomus with Gl .