土壤机械组成

采用2m×2m均匀栅格取样方式和等级次序地统计学方法，研究了面积为200m2褐土耕层土壤机械组成的空间变异性。

Regular square grids with 2 m spacing was adopted to study the spatial variability of the cinnamon soil mechanical composition in a 10 m × 20 m plot .

土壤机械组成：与农耕地相比，各种模式中的上层（0～20cm）土层中砂粒含量明显低于农耕地砂粒含量，而细粒径中粘粒、物理性粘粒含量显著高于农耕地。

Soil mechanical composition : In the top soil ( 0 ~ 20cm ), the amounts of sand of different patterns of converting lands into forests was lower than that of farmland , while the amounts of clay and physical clay was higher than that of farmland .

土壤机械组成是最基本的土壤参数之一。

Soil mechanical composition is an important parameter in soil science research .

贵州省地面组成物质对土壤机械组成的影响

Impact of ground substance on mechanical composition of soil in Guizhou Province

艾比湖流域土壤机械组成测定与分析

The Soil Mechanical Composition Determination and Analysis in The Ebinur Lake Basin

应用激光粒度仪分析土壤机械组成的实验研究

An Experiment Study on Employing Laser Grain-size Analyzer to Analyze Soil Mechanical Composition

总之，运用激光粒度分析土壤机械组成是可行的。

In sum , using laser grain-size analysis in studying soil mechanical composition was feasible .

土壤机械组成及容重对水分特征参数影响模拟试验研究驱动型土壤耕作机械

Simulated Experiment on Effects of Soil Mechanical Composition and Soil Bulk Density on Soil Water Characteristic Parameters tillage machine with power-driven working parts

5免耕农田、退耕草地和封育草地三种土地利用方式下，土壤机械组成比较稳定，短时间内变化不明显。

The soil mechanical compositions were relatively stable under three land use types of no-tillage farmland , enclosed meadows and farming-withdrawn grassland and were changed less .

以陕北农牧交错带为研究对象，通过对不同人工植被下的土壤机械组成、土壤养分、土壤微生物、土壤酶活性的变化进行分析，得到不同植被对土壤质量的影响结果。

Based on the study of soil mechanical composition , soil fertility , soil microorganism and soil enzyme activities'changes in the agriculture and animal interlace zone of Northern Shaanxi .

土壤机械组成分析就是指土壤粒径分析，即测定组成土壤的不同直径颗粒的含量。

The analysis of soil mechanical component is to analyze soil grain diameter . That is to say , it is to measure the content which composed the different diameter particle .

2该地区旱砂地农田土壤机械组成以砂粒和砾石为主，分别在60%和20%左右，构成了多砾质砂土。

The soil mechanical composition of dry-sandy farmland in this region was mainly sand and gravel that the contents are stable , which respectively were about 60 % and 20 % .

结果表明，4种红壤的持水和透水性能存在不同程度差异，其原因是不同成土母质的土壤机械组成、土壤结构的变化造成的。

The results show that varying differences exist between the four soils in water-holding capacity and permeability because of differences in soil mechanic composition and soil structure as a result of their difference in parent material .

结果表明，在高寒草地沙化进程中，存在着土壤机械组成不断变粗、土壤容重不同程度增加而孔隙度相应减小的变化趋势。

The results showed that : in the desertification process of the alpine meadow , the soil mechanical constitution tended to gradually become rougher , the weight per unit volume increased to some extent while soil porosity decreased accordingly .

本文以重庆市典型岩溶山地为例，探讨了岩溶生态系统土地利用方式与土壤机械组成、土壤水稳性团聚体、土壤有机质、土壤种子库、植被类型的关系。

This paper chooses the typical karst mountains in Chongqing as an example to discuss the impact of different land use patterns on mechanical composition of soil , water stable aggregates , soil organic matter , the compositions of soil seed banks and bio diversity of karst eco system .

河北省主要土壤的机械组成及其地理分布规律

The mechanical composition of soils and its general principles of geographical distribution in Hebei Province

土壤的机械组成逐渐由粘土向粗粉、中粉和细粉转化，土壤结构良好，通气透水性能加大。

The component of soil gradually transformed clayey soils into coarse soils , middle granule and fine soils .

通过分析贵州喀斯特地区土壤的机械组成、物质成分、理化性质和微生物特性，探讨了土壤石漠化的本质。

Soil mechanical composition , physical features , chemical properties , microbial feature and chemical composition of soils were measured for studying the Karst rocky desertification .

研究结果表明：（1）大庆市不同类型土壤表层机械组成分布呈现砂粒含量较多，粉粒和粘粒含量较少的趋势。

The results showed : ( 1 ) Mechanical composition distribution of different types of soil surface showed a more sand , less silt and clay trend .

本文根据230个土壤剖面的机械组成数据绘制了海宁县土壤质地图。

The soil texture chart of Haining County was mapped based on data of mechanical composition of 230 soil profiles .

结皮的物理特性主要体现在（1）土壤结皮的机械组成以细砂和粗粉砂为主，但总量低于同种对照土壤；小于0.01mm的物理性粘粒结皮含量高于对照；

Characteristic of Crust : ( 1 ) The main composition of soil crust is fine sand and coarse mealy sand , while their contents are lower than comparison soil and the contents of the crust with physically clay ( < 0.01mm ) are higher than comparison soil .

通过激光法和吸管法对9个土壤样品的土壤机械组成对比测试分析，探讨了应用激光粒度仪分析土壤机械组成的可行性与实验条件；

The feasibility and experimental conditions of soil particle size analyzing by the laser particle-size analysis was discussed , based on the comparison results of nine soil samples by the laser particle-size analysis and traditional pipette and sieve analysis .

土壤入渗过程受土壤机械组成、微团聚体和孔隙组成的综合影响。

Soil infiltration process is influenced comprehensively by soil PSD , ASD and SPD .

冻融作用对土壤水分、密度、有机质和土壤的机械组成等因素都有不同程度的影响。

Freeze-thaw action can effect in varying degrees to factors such as soil moisture , density , organic quality and soil machinery composition .

研究了风沙化土地葡萄园土壤温度、光照强度、风况及土壤机械组成、养分与水分状况等环境效应，为葡萄园间作套种及设施高效栽培提供理论依据。

The environmental efficiencies of factors such as soil temperature , intensity of illu-minance , wind in sand grapery , and composition , water and nutrient of soil , are analyzed . The results are conductive to intercropping , interplanting and facility planting in sand grapery .

在水稻生长季节，测量了多种中国南方水田土壤的有关参数，给出了部分典型南方水田土壤机械组成、含水量、土壤强度和软泥层深度的数据。

Various paddy field soils in South China were measured during the rice growing season and numerous data were collected concerning soil composition , water content soil strength and depth of soft soil layer .

利用XRD、粒度分析、土壤风化模拟试验等方法，对黄土区土壤有效硅含量分布、土壤机械组成、粘粒矿物种类及含量分布、土壤溶液pH值和土壤矿物风化过程中硅的析出规律进行研究。

The content and distribution of available silicon , grain size , clay minerals in the soil , pH of soil solution , and silicon solubility in the weathering process were studied by means of XRD , grain-size analysis and simulating experiment on soil weathering .

最后通过灭菌与不灭菌条件下的土壤培养，采用湿筛、氯仿熏蒸等方法，进一步研究了碳源物质、土壤机械组成对菌株在土壤中的生长以及对土壤水稳性团聚体形成的影响。

Subsequently through the soil ( sterilized or not ) culture , the effects of carbon source and soil structure on the isolated bacteria growth and formation of WSA were studied by wet sieve and chloroform fumigation extraction methods .

土壤性状对植物群落特征变化的响应程度表现为土壤水分含量与客重最为敏感，土壤养分含量较为敏感，而土壤机械组成则最不敏感。

With the increase of enclosing time , the responsive degree of soil properties to the change of plant community characters was : water contents and bulk densities > nutrient contents > mechanical compositions .