parent material

The effect of parent material on the newly formed humus

母质对新形成腐殖质的影响

The content and shape of gypsum is not related to soil texture, but to parent material.

石膏含量和形态与母质类型有关，不受质地的影响；

Cytological observation indicates that they belong to 1B/ 1R type which is a kind of antigen parent material hard to ob-tain.

细胞学观察表明，它们均系1B/1R类型，是难得的抗源亲本材料。

The weld will rarely be as strong as the parent material.

焊缝强度通常小于母材强度.

The parent material for the two locations is river alluvial soil.

两个地点土壤母质为河流冲积土.

In arid environment and effects of biology and chemistry, the soils presented certain inheritance and variations to chemical Compositions of bedrock/ parent material.

在较干旱的环境及生物、化学作用影响下，土壤对基岩/母质在化学成分上既表现出一定的继承性，又有一定变异性。

The soil analysis in trial areas with different soil, climate and vegetation conditions implied that the soil in trial areas mainly belongs to drab soil, soil texture belong to light loam and loam soil, soil parent material was mainly granite and gneiss.

研究区不同立地下的土壤分析结果表明，土壤主要为褐土，土壤质地属于轻壤土和壤土类型，土壤母质主要为花岗岩和片麻岩。

Cultivated soil-forming parent material is mainly slope sediments , fluvial and alluvial materials.

耕地成土母质主要是坡积物 、 洪积物和冲积物.

In addition, the big aggregate of parent material layer and bare soils had the biggest slaking index ( RSI) and the cultivated soils ranked the next place. 3.

利用方式中，母质层和荒地土壤的大团聚体消散系数（RSI）最大，其次是耕地。而小团聚体中，耕地的RSI最小。3不同测定方法获得的稳定性指标，土壤稳定性排序不同。

Change of Physical-Chemical Properties and Heavy Mental Element in Soil from Different Parent Material/ Rock

贵阳市乌当区不同母质发育的土壤理化性质和重金属含量差异研究

The various mountain climate, biology, landform and parent material lead to numerous soil types and different distribution of soils in verticality.

多样的山地气候、生物、地形及成土母质，形成了众多的土壤类型以及土壤垂直分布差异。

The weathering of bedrock produces the parent material that soils form from.

基岩风化产生的母质就是土壤形成的来源.

Fertilizer application was the main method of accelerating parent material red soil maturation process.

施肥是加速红壤母质熟化的主要途径和方法.

The main factors that caused corrosion of welding seams were unmatchable welding material and parent material, separation of MnS and roughness of welding seams.

焊接材料与母材的不匹配、焊接时非金属夹杂物MnS的析出以及焊缝的凸起与凹陷，是焊缝腐蚀形成的主要因素。

The parent material can be either transported or residual.

母料可能是转移而来或积聚起来的.