一.为什么要了解土壤有机质? 二土壤有机质是什么?有多少? 三.土壤中有机质如何转化? 四.土壤腐殖质如何存在? 五.土壤腐殖质有什么作用?如何更好地发挥这种作用?

Section 1 The types of soil water and measuring soil moisture a

Section 1 Soil colloidal surface nature Surface types of the soil colloid (一) Siloxane surface (二) Hydrous oxide surface (三)Organic matter surface

Chapter 9 Soil acid-base and redox reaction Section 1 The formation of soil acid-base The acid-base reaction of soil The acid-base reaction of soil is change in soil pH. Soil pH is probably the single most important chemical charecteristic of a soil. The knowledge of ph is needed to understand important chemical processes such as ion

Section 1 Soil air 一、 Composition of soil air Compare soil air with atmosphere( Volume % Atmosphere

Section 1 Soil three phases Constitution Soil density and bulk density (- Soil density (or Particle density Soil density is the density of the solid soil particles only; the measurement does not include water weight or pore(air)space. The dominant soil minerals- quartz, feldspars, micas, and clay minerals

Section 1 The chemical and mineral constitutes of soil parent minerals The chemical constitutes of soil parent minerals

Introduction to soil science By Genxing pan Department of Soil Science, Inst Resources, Ecosystem Environment of Agriculture(Ireea) www.ireea.kyig.njau.edu.cn

1. 土壤有机质概述 2.土壤有机质的转化 3.土壤腐殖质的形成 4.土壤有机质对土壤肥力的影响 5.提高土壤有机质的原则和途径 第一节 土壤有机质的来源、含量及其组成 第二节 土壤有机质的分解和转化 第三节 土壤腐殖物质的形成和性质 第四节 土壤有机质的作用及管理

1.土壤三相组成(重点) 2.土壤质地与结构(重点) 3.土壤孔性和土体构造