土壤学双语教学 (2).ppt

Chapter 1 Soil Mineral Material
Section 1 The chemical and mineral constitutes of soil parent minerals
一、The chemical constitutes of soil parent minerals
Soil
Mineral Material
38%,(95%)
Organic matter
12%,(5%)
Solution
(15-35%)
Air
(15-35%)
Distributive law
(1)The oxygen( O) and silicon( Si) are main two elements in the earth crust. The second elements are iron and aluminum. Four elements occupy about % weight of the earth crust.
(2)The essential elements for plant growing are very low and distribute unbalance in earth crust.
二、The mineral constitutes in the soil
According to the crystallize appearance of the mineral, the mineral can be divided into:
Crystallization mineral and no-crystallization mineral
According to the source of the mineral, the mineral can be divided into:
Primary mineral and secondary mineral
二、The mineral constitutes in the soil
Primary mineral formed from cooling the molten(lava) rock.
①The silicate and aluminosilicates are positions in the primary mineral.
② The feldspar and quartz are main mineral in the primary mineral.
③The primary mineral is an important source of the plant nutrient .